From: Steven Baltakatei Sandoval <baltakatei@gmail.com>
Date: Thu, 4 Jun 2020 01:42:33 +0000 (+0000)
Subject: feature(user) Add legacy user scripts
X-Git-Tag: 0.1.0~19
X-Git-Url: https://zdv2.bktei.com/gitweb/BK-2020-03.git/commitdiff_plain/0d22dfcdb7eab1975d56ed36967885707470c828?ds=inline;hp=--cc

feature(user) Add legacy user scripts

Add legacy user scripts from the existing `~/Sync/baltakatei_bin`
repository.
---

0d22dfcdb7eab1975d56ed36967885707470c828
diff --git a/user/bkdate b/user/bkdate
new file mode 100755
index 0000000..1bf808b
--- /dev/null
+++ b/user/bkdate
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# Date: 2020-02-06T22:51Z
+
+# Description: A simple command line tool to dispay the date in ISO-8601 format.
+
+DATE="$(date --iso-8601=seconds)"
+
+if [[ $DATE =~ "+00:00"$ ]]; then
+    DATE2=${DATE::-6}"Z"
+    echo $DATE2
+    exit 0
+else
+    echo $DATE
+    exit 0
+fi
diff --git a/user/bkdatename b/user/bkdatename
new file mode 100755
index 0000000..ace4e01
--- /dev/null
+++ b/user/bkdatename
@@ -0,0 +1,32 @@
+#!/bin/bash
+
+# Date: 2020-05-10T15:27Z
+# Author: Steven Baltakatei Sandoval
+# License: GPLv3+
+# Ref./Attrib:
+#  [1]: John1024 (2014-08-06). ["linux-shell: renaming files to creation time"](https://stackoverflow.com/a/25153352). Licensed CC BY-SA 4.0.
+#  [2]: Computer Hope (2019-05-04). ["Bash read builtin command"](https://www.computerhope.com/unix/bash/read.htm).
+
+# Description: Preappends modification time to all files in current
+# working directory.
+
+# Usage: bkdatename
+
+# Prompt to change filenames for all files in working directory.
+read -p "Append each file's modification date & time to the start of its name in the current working directory? (y/n)" -n 1 -r
+echo
+if [[ $REPLY =~ ^[Yy]$ ]] # see [2]
+then
+    #Perform renaming operation.
+    for f in *
+    do
+	FILE_NAME="$f"
+	FILE_MDATE="$(date -r "$f" +"%Y%m%dT%H%M%S")" # See [1].
+	FILE_NAME_NEW="$FILE_MDATE".."$FILE_NAME"
+	# Display new file name
+	echo "Renaming $f to:""$FILE_NAME_NEW"
+	cp -p ./"$f" ./"$FILE_NAME_NEW"
+	rm ./"$f"
+    done
+    echo "Done."
+fi
diff --git a/user/bkgit-status b/user/bkgit-status
new file mode 100755
index 0000000..5ec774e
--- /dev/null
+++ b/user/bkgit-status
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Date: 2020-01-02T03:21Z
+
+# Description: A bash script to perform the `git-status` command on
+#all subdirectories within the working directory.
+
+# Source: https://gist.github.com/mzabriskie/6631607
+
+#for d in ./*/ ; do (cd "$d" && echo "========================" && pwd && git status); done
+
+for d in ./*/ ; do
+    (
+	cd "$d"
+	if [ -d ./.git ];
+	then
+	   #echo "========================"
+	   pwd
+	   git status -s
+	else
+	    echo "ERR:No .git dir: "$(pwd)
+	fi
+    );
+done
diff --git a/user/bkhextobin b/user/bkhextobin
new file mode 100755
index 0000000..39a7ae0
--- /dev/null
+++ b/user/bkhextobin
@@ -0,0 +1,5 @@
+#!/bin/bash
+echo "type a hex number"
+read hexNum
+echo -n "The binary value of $hexNum="
+echo "obase=2; ibase=16; $hexNum" | bc
diff --git a/user/bkidle b/user/bkidle
new file mode 100755
index 0000000..66aff23
--- /dev/null
+++ b/user/bkidle
@@ -0,0 +1,17 @@
+#!/bin/bash
+
+# Date: 2020-03-09T04:51Z
+
+# Description: A bash script showing recent edits to a given
+# directory.
+
+# Usage: bkidle [dir]
+
+TARGET_DIR="$1"
+
+while true;
+do
+    find "$1" -readable -mmin -1 -type f -exec b2sum -l 32 '{}' \;;
+    echo "$(date +%Y%m%dT%H%M%S.%N%z)========";
+    sleep 60;
+done
diff --git a/user/bklu b/user/bklu
new file mode 100755
index 0000000..52e2c0d
--- /dev/null
+++ b/user/bklu
@@ -0,0 +1,467 @@
+#!/bin/bash
+
+# Date: 2020-05-04T18:50Z
+# Author: Steven Baltakatei Sandoval
+# Description: Script to lookup file hash from existing hash list.
+# Note: Use hide-show-block function to aid readability. (ex: https://www.emacswiki.org/emacs/HideShow ).
+
+#== Variable Initialization ==
+
+#== Global constants ==
+SCRIPT_TTL=10                   # Limit script life to this in seconds.
+PATH="/usr/local/bin/:$PATH"    # Add user binary executable directory to PATH.
+PATH="/opt/bktei:$PATH"         # Add 'optional' executable directory to PATH.
+SCRIPT_HOSTNAME=$(hostname)     # Save hostname of system running this script.
+SCRIPT_VERSION="bktemplate.sh 0.0.0" # Define version of script. Used by function 'showVersion'.
+SCRIPT_TIME_SHORT="$(date +%Y%m%dT%H%M%S%z)" # Save current date & time in ISO-8601 format (YYYYmmddTHHMMSS+zzzz).
+SCRIPT_DATE_SHORT="$(date +%Y%m%d)"          # Save current date in ISO-8601 format.
+
+#== Function Definitions ==
+echoerr() {
+    # Usage: echo [ arguments ]
+    # Description: Prints provided arguments to stderr.
+    # Input: unspecified
+    # Output: stderr
+    # Script function dependencies: none
+    # External function dependencies: echo
+    # Last modified: 2020-04-11T21:16Z
+    # Last modified by: Steven Baltakatei Sandoval
+    # License: GPLv3+
+    # Ref./Attrib:
+    #  [1]: # Roth, James (2010-06-07). ["How to print text to stderr instead of stdout"](https://stackoverflow.com/a/2990533). Licensed CC BY-SA 4.0.
+    
+    echo "$@" 1>&2; # Define stderr echo function. See [1].
+    return 0; # Function finished.
+} # Define stderr message function.
+vbm() {
+    # Usage: vbm "DEBUG:verbose message here"
+    # Description: Prints verbose message ("vbm") to stderr if OPTION_VERBOSE is set to "true".
+    # Input:
+    #   - OPTION_VERBOSE  variable set by processArguments function. (ex: "true", "false")
+    #   - "$@"            positional arguments fed to this function.
+    # Output: stderr
+    # Script function dependencies: echoerr
+    # External function dependencies: echo
+    # Last modified: 2020-04-11T23:57Z
+    # Last modified by: Steven Baltakatei Sandoval
+    # License: GPLv3+
+    # Ref./Attrib:
+
+    if [ "$OPTION_VERBOSE" == "true" ]; then
+	FUNCTION_TIME=$(date --iso-8601=ns); # Save current time in nano seconds.
+	echoerr "[$FUNCTION_TIME] ""$@"; # Display argument text.
+    fi
+
+    # End function
+    return 0; # Function finished.
+} # Verbose message display function.
+showUsage() {
+    # Usage: showUsage
+    # Description: Displays script usage information.
+    # Input: none
+    # Output: stderr
+    # Script function dependencies: echoerr
+    # External dependencies: bash (5.0.3), echo
+    # Last modified: 2020-05-04T16:58Z
+    # Last modified by: Steven Baltakatei Sandoval
+    # License: GPLv3+
+    # Ref./Attrib.:
+
+    echoerr "USAGE:"
+    echoerr "    bklu [OPTIONS] [FILE]"
+    echoerr
+    echoerr "    [FILE] hash is compared against file contents of directory"
+    echoerr "      specified by --input-dir option or environment variable"
+    echoerr "      BK_FILEHASHLIST_DIR ."
+    echoerr
+    echoerr "OPTIONS:"
+    echoerr "    --digest-algo [ digest name ]"
+    echoerr "            Specify digest command name. Value should be GNU"
+    echoerr "            coreutils commands such as: sha256sum, md5sum, b2sum."
+    echoerr "            Default value is: b2sum"
+    echoerr
+    echoerr "    -h, --help"
+    echoerr "            Display help information."
+    echoerr
+    echoerr "    --version"
+    echoerr "            Display script version."
+    echoerr
+    echoerr "    -v, --verbose"
+    echoerr "            Display debugging info."
+    echoerr
+    echoerr "    -o, --output-file [ file ]"
+    echoerr "            Specify output file."
+    echoerr
+    echoerr "    -i, --input-file [ file ]"
+    echoerr "            Specify input file."
+    echoerr
+    echoerr "    -o, --output-dir [ directory ]"
+    echoerr "            Specify output directory."
+    echoerr
+    echoerr "    -i, --input-dir [ directory ]"
+    echoerr "            Specify input directory."
+    echoerr
+
+
+    # End function
+    return 0; # Function finished.
+} # Display information on how to use this script.
+showVersion() {
+    # Usage: showVersion
+    # Descriptoin: Displays script version and license information.
+    # Input: unspecified
+    # Output: stderr
+    # Script function dependencies: echoerr
+    # External function dependencies: echo
+    # Last modified: 2020-04-11T23:57Z
+    # Last modified by: Steven Baltakatei Sandoval
+    # License: GPLv3+
+    # Ref./Attrib:
+
+    # Initialize function
+    vbm "DEBUG:showVersion function called."
+
+    # Perform work
+    OUTPUT="$SCRIPT_VERSION"
+
+    # Display results
+    echoerr "$OUTPUT";
+
+    # End function
+    vbm "DEBUG:showVersion function ended."
+    return 0; # Function finished.
+} # Display script version.
+processArguments() {
+    # Usage: processArguments "$@"
+    # Description: Processes provided arguments in order to set script option variables useful for
+    #   changing how other functions behave. For example, it may:
+    #   1. Activate verbose mode
+    # Input: "$@"          (list of arguments provided to the function)
+    # Output: Sets following variables used by other functions:
+    #   OPTION_VERBOSE     Indicates verbose mode enable status.  (ex: "true", "false")
+    #   DIROUT1            Path to output directory.
+    #   FILEOUT1           Path to output file.
+    #   DIRIN1             Path to input directory.
+    #   FILEIN1            Path to input file.
+    #   OPTION_FILEOUT1_OVERWRITE Indicates whether file FILEOUT1 should be overwritten (ex: "true", "false')
+    #   DIGEST_ALGO        Name of digest command (unverified).
+    # Script function dependencies:
+    #   - echoerr          Displays messages to stderr.
+    #   - vbm              Displays messsages to stderr if OPTION_VERBOSE set to "true".
+    # External dependencies: bash (5.0.3), echo
+    # Last modified: 2020-05-04T18:13Z
+    # Last modified by: Steven Baltakatei Sandoval
+    # License: GPLv3+
+    # Ref./Attrib.:
+    #  [1]: Marco Aurelio (2014-05-08). "echo that outputs to stderr". https://stackoverflow.com/a/23550347
+
+    # Initialize function
+    #vbm "DEBUG:processArguments function called."
+
+    # Perform work
+    while [ ! $# -eq 0 ]; do   # While number of arguments ($#) is not (!) equal to (-eq) zero (0).
+	#1>&2 echo "DEBUG:Starting processArguments while loop." # Debug stderr message. See [1].
+        #1>&2 echo "DEBUG:Provided arguments are:""$@" # Debug stderr message. See [1].
+	case "$1" in
+	    -h | --help) showUsage; exit 1;; # Display usage.
+	    --version) showVersion; exit 1;; # Show version
+	    -v | --verbose) OPTION_VERBOSE="true"; vbm "DEBUG:Verbose mode enabled.";; # Enable verbose mode. See [1].
+	    -i | --input-file) # Define input file path
+		if [ -f "$2" ]; then # If $2 is file that exists, set FILEIN1 to $2, pop $2.
+		    FILEIN1="$2";
+		    shift;
+		    vbm "DEBUG:Input file FILEIN1 set to:""$2";
+		else
+		    echoerr "ERROR: Specified input file does not exist:""$2";
+		    echoerr "Exiting.";
+		    exit 1;
+		fi ;; 
+	    -I | --input-dir) # Define input directory path.
+		if [ -d "$2" ]; then # If $2 is dir that exists, set DIRIN1 to $2, pop $2.
+		    DIRIN1="$2";
+		    shift;
+		    vbm "DEBUG:Input directory DIRIN1 set to:""$2";
+		else # Display error if $2 is not a valid dir.
+		    echoerr "ERROR:Specified input directory does not exist:""$2";
+		    echoerr "Exiting.";
+		    exit 1;
+		fi ;; 
+	    -o | --output-file) # Define output file path
+		if [ -f "$2" ]; then # If $2 is file that exists, prompt user to continue to overwrite, set FILEOUT1 to $2, pop $2.
+		    echoerr "Specified output file $2 already exists. Overwrite? (y/n):"
+		    read m; case $m in
+				y | Y | yes) OPTION_FILEOUT1_OVERWRITE="true";;
+				n | N | no) OPTION_FILEOUT1_OVERWRITE="false";;
+				*) echoerr "Invalid selection. Exiting."; exit 1;;
+			    esac
+		    if [ "$OPTION_FILEOUT1_OVERWRITE" == "true" ]; then
+			FILEOUT1="$2";
+			shift;
+			vbm "DEBUG:Output file FILEOUT1 set to:""$2";
+		    else
+			echoerr "ERORR:Exiting in order to not overwrite output file:""$FILEOUT1";
+			exit 1;
+		    fi
+		else
+		    FILEOUT1="$2";
+		    shift;
+		    vbm "DEBUG:Output file FILEOUT1 set to:""$2";
+		fi ;;
+	    -O | --output-dir) # Define output directory path
+		if [ -d "$2" ]; then # If $2 is dir that exists, set DIROUT1 to $2, pop $2
+		    DIROUT1="$2";
+		    shift;
+		    vbm "DEBUG:Output directory DIROUT1 set to:""$2";
+		else
+		    echoerr "ERROR:Specified output directory is not valid:""$2";
+		    echoerr "Exiting.";
+		    exit 1;
+		fi ;;
+	    --digest-algo) # Define file digest algorithm command name.
+		if ! [ -z "$2" ]; then # If $2 is non-zero, set DIGEST_ALGO to $2, pop $2
+		    DIGEST_ALGO="$2";
+		    shift;
+		    vbm "DEBUG:DIGEST_ALGO set to:""$DIGEST_ALGO";
+		else
+		    echoerr "ERROR:Cannot set DIGEST_ALGO because no string specified."; echoerr "Exiting."; exit 1;
+		fi ;;
+	    *) if [ -f "$1" ] && ! [ -v FILEIN1 ]; then # If $1 is file and FILEIN1 not set, then set FILEIN1 to $1, pop $1.
+		   FILEIN1="$1";
+		   shift;
+		   vbm "DEBUG:FILEIN1 set to:""$FILEIN1";
+	       else # Handle non-option (ex: [FILE] )
+		   echoerr "ERROR: Unrecognized non-option argument."; echoerr "Exiting."; exit 1;
+	       fi ;;
+	esac
+	shift;
+    done
+
+    # End function
+    vbm "DEBUG:processArguments function ended."
+    return  0; # Function finished.
+} # Evaluate script options from positional arguments (ex: $1, $2, $3, etc.).
+checkExecutables() {
+    # Usage: checkExecutables [ command1 ] [ command2 ] [...] [ commandN ]
+    # Description: Checks that provided commands exist. If one or more do not exist, then display missing commands and exit with error.
+    # Input:
+    #   - command names (arguments)
+    # Output: commands that don't exist (stderr)
+    # Script function dependencies:
+    #   - echoerr          for displaying errors via stderr
+    #   - processArguments for setting OPTION_VERBOSE
+    #   - vbm              for displaying verbose messages if OPTION_VERBOSE is "true"
+    # External dependencies: bash (5.0.3), command
+    # Last modified: 2020-05-04T17:12Z
+    # Last modified by: Steven Baltakatei Sandoval
+    # License: GPLv3+
+    # Ref./Attrib.:
+    #  [1]: SiegeX (2010-12-12). ["Difference between return and exit in Bash functions."](https://stackoverflow.com/a/4419971). Licensed CC BY-SA 4.0.
+    #  [2]: Darryl Hein (2009-12-23). ["Add a new element to an array without specifying the index in Bash"](https://stackoverflow.com/a/1951523). Licensed CC BY-SA 4.0.
+    #  [3]: kojiro (2012-10-03). ["Convert command line arguments into an array in Bash"](https://stackoverflow.com/a/12711853)
+    #  [4]: niieani (2016-01-12). ["How to copy an array in Bash?"](https://stackoverflow.com/a/34733375/10850071). Licensed CC BY-SA 4.0.
+
+    # Initialize function
+    vbm "DEBUG:checkExecutables function called."
+    declare -a candidateCommandsNames # Initialize array for storing positional arguments provided to this function.
+    candidateCommandsNames=("$@") # Save positional arguments to variable as string. See [3].
+    vbm "DEBUG:candidateCommandsNames:""$@"
+    vbm "DEBUG:candidateCommandsNames[0]:""${candidateCommandsNames[0]}"
+    vbm "DEBUG:candidateCommandsNames[1]:""${candidateCommandsNames[1]}"
+    vbm "DEBUG:candidateCommandsNames[2]:""${candidateCommandsNames[2]}"
+    declare -a outputInvalidCommandsArray # Initialize arary for storing names of invalid commands.
+    declare -a outputValidCommandsArray # Initialize array for storing names of valid commands.
+
+    # Perform work
+    for candidateCommandName in "${candidateCommandsNames[@]}"; do  # Search through all space-delimited text for valid commands.
+	if command -v "$candidateCommandName" 1>/dev/null 2>/dev/null; then # Check if a command is valid or not.
+	    outputValidCommandsArray+=("$candidateCommandName") ; # See [2].
+	    vbm "DEBUG:Adding $candidateCommandName to outputValidCommandsArray."
+	else
+	    outputInvalidCommandsArray+=("$candidateCommandName") ; # See [2].
+	    vbm "DEBUG:Adding $candidateCommandName to outputInvalidCommandsArray."
+	fi
+    done
+
+    # Output results
+    if [ ${#outputInvalidCommandsArray[@]} -gt 0 ]; then # if number of elements in outputInvalidCommandsArray greater than 0, then display offending commands and exit 1.
+	echoerr "ERROR: Invalid commands found:""${outputInvalidCommandsArray[@]}"; # display invalid commands as error
+	exit 1; # See [1].
+    elif [ ${#outputInvalidCommandsArray[@]} -eq 0 ]; then # if number of elements in outputInvalidCommandsArray equals zero, then return 0.
+	vbm "DEBUG: Valid commands are:""${outputValidCommandsArray[@]}"; # display valid commands if verbose mode enabled
+	return 0; # See [1].
+    else
+	echoerr "ERROR: Check outputInvalidCommandsArray.";
+    fi
+
+    # End function
+    vbm "DEBUG:checkExecutables function ended."
+    return 0; # Function finished.
+} # Check that certain executables exist.
+updateTimeConstants() {
+    # Usage: updateTimeConstants
+    # Description: Updates time-related variables for use by other scripts.
+    # Input: (none)
+    # Output: Sets following variables:
+    #   TIME_CURRENT       Current time in long ISO-8601 format.  (ex: YYYY-mm-ddTHH:MM:SS+ZZZZ)
+    #   TIME_CURRENT_SHORT Current time in short ISO-8601 format. (ex: YYYYmmddTHHMMSS+ZZZZ)
+    #   DATE_CURRENT       Current date in ISO-8601 format.       (ex: YYYY-mm-dd)
+    #   DATE_CURRENT_SHORT Current date in short ISO-8601 format. (ex: YYYYmmdd)
+    #   DATE_TOMORROW      Tomorrow's date in ISO-8601 format.    (ex: YYYY-mm-dd)
+    #   TIME_NEXT_MIDNIGHT Time of tomorrow's midnight in long    (ex: YYYY-mm-ddTHH:MM:SS+ZZZZ)
+    #                       ISO-861 format.
+    #   SEC_TIL_MIDNIGHT   Seconds until next midnight.
+    # Script function dependencies:
+    #   - echoerr          for displaying errors via stderr
+    #   - processArguments for setting OPTION_VERBOSE
+    #   - vbm              for displaying verbose messages if OPTION_VERBOSE is "true"
+    # External dependencies: bash (5.0.3), date, echo
+    # Last modified: 2020-04-11T23:59Z
+    # Last modified by: Steven Baltakatei Sandoval
+    # License: GPLv3+
+    # Ref./Attrib.:
+
+    # Initialize function
+    vbm "DEBUG:updateTimeConstants function called."
+
+    # Perform work
+    TIME_CURRENT="$(date --iso-8601=seconds)" ;
+    TIME_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%dT%H%M%S%z)"
+    DATE_CURRENT="$(date -d "$TIME_CURRENT" --iso-8601=date)" ;
+    DATE_CURRENT_SHORT="$(date -d "$TIME_CURRENT" +%Y%m%d)" ;
+    DATE_TOMORROW="$(date -d "$TIME_CURRENT next day" --iso-8601=date)" ;
+    TIME_NEXT_MIDNIGHT="$(date -d "$DATE_TOMORROW" --iso-8601=seconds)" ;
+    SECONDS_UNTIL_NEXT_MIDNIGHT="$((  $(date +%s -d "$TIME_NEXT_MIDNIGHT") - $(date +%s -d "$TIME_CURRENT")  ))" ;
+
+    # End function
+    vbm "DEBUG:updateTimeConstants function ended."
+    return 0; # Function finished.
+} # Update time constants
+getGnucuDigest() {
+    # Usage: getGnucuDigest [algo] [file]
+    # Description: Calculates cryptographic digest using specified GnuCoreutils command.
+    # Input:
+    #   $1: [algo]     (ex: sha256sum, sha512sum, b2sum, md5sum)
+    #   $2: [file]
+    # Output: stdout 
+    # Script function dependencies:
+    #   - echoerr          for displaying errors via stderr
+    #   - processArguments for setting OPTION_VERBOSE
+    #   - vbm              for displaying verbose messages if OPTION_VERBOSE is "true"
+    #   - checkExecutables for checking that digest algo commands exist
+    # External dependencies: bash (5.0.3), echo, awk
+    # Last modified: 2020-05-04T18:51Z
+    # Last modified by: Steven Baltakatei Sandoval
+    # License: GPLv3+
+    # Ref./Attrib.:
+    #  [1]: gnu.org (2000-11). [GNU Coreutils](https://www.gnu.org/software/coreutils/manual/coreutils.html). Licensed FDL v1.3+.
+    #  [2]: linuxize.com (2019-07-19). [How to Check if a String Contains a Substring in Bash](https://linuxize.com/post/how-to-check-if-string-contains-substring-in-bash/).
+
+    # Initialize function
+    vbm "DEBUG:getGnucuDigest function called."
+    DIGEST_ALGO=$1 # Define candidate digest algorithm
+    TARGET_FILE=$2 # Define target file to be digested
+    GNUCU_DIGESTS="b2sum md5sum sha1sum sha224sum sha256sum sha384sum sha512sum" # Define space-delimited string with GNU Coreutils digest algorithms. See [1].
+    vbm "DEBUG:DIGEST_ALGO set to:""$DIGEST_ALGO"
+    vbm "TARGET_FILE set to:""$TARGET_FILE"
+    vbm "GNUCU_DIGESTS set to:""$GNUCU_DIGESTS"
+    checkExecutables "$DIGEST_ALGO"; # Check that specified alogirthm command available.
+    if [[ "$GNUCU_DIGESTS" =~ .*"$DIGEST_ALGO".* ]]; then
+	vbm "DEBUG:Confirmed to be a valid GNU Coreutils command:""$DIGEST_ALGO";
+    else
+	vbm "ERROR:Not a valid GNU coreutils command:""$DIGEST_ALGO";
+	exit 1;
+    fi # Check specified algo against GNUCU_DIGESTS. See [2].
+    
+    # Perform work
+    OUTPUT="$("$DIGEST_ALGO" "$TARGET_FILE" | awk '{print $1}')"
+    vbm "DEBUG:Calculated digest using $DIGEST_ALGO is:""$OUTPUT"
+
+    # Output results
+    echo "$OUTPUT"
+    
+    # End function
+    vbm "DEBUG:getGnucuDigest function ended."
+    return 0; # Function finished.
+} # Calculate GNUCoreutils digest
+
+
+#== Main Program Definition ==
+main() {
+    # Usage: main "$@"    # See [1].
+    # Input: unspecified (note: all Global Constants declared at beginning of script assumed to be available)
+    #   OPTION_VERBOSE   (used by vbm, set by processArguments)  (ex: "true", "false")
+    #   DIGEST_ALGO      (used by getGnucuDigest, set by processArguments) (ex: "md5sum")
+    # Output: unspecified
+    # Script function dependencies:
+    #   - echoerr          for displaying errors via stderr
+    #   - vbm              for displaying verbose messages if OPTION_VERBOSE is "true"
+    #   - processArguments for setting OPTION_VERBOSE
+    #   - checkExecutables for checking that specified commands are available
+    # External dependencies: bash (5.0.3), echo
+    # Last modified: 2020-05-04T18:44Z
+    # Last modified by: Steven Baltakatei Sandoval
+    # License: GPLv3+
+    # Ref./Attrib.:
+    #  [1]: ErichBSchulz (2011-11-20). [How to correctly pass bash script arguments to functions](https://stackoverflow.com/a/8198970). Licensed CC BY-SA 4.0.
+
+    # Initialize function
+    processArguments "$@" # Process arguments.
+    vbm "DEBUG:main function called."
+    vbm "DEBUG:main function arguments are:""$@"
+    checkExecutables "echo" "date" "cut" "awk" "grep" # Confirm that executables necessary to run are available. Exit if any fail.
+
+    # Process inputs
+    # If DIRIN1 unset and global variable BK_FILEHASHLIST_DIR set and is dir, then set DIRIN1 to BK_FILEHASHLIST_DIR.
+    if ! [ -v DIRN1 ] && [ -v BK_FILEHASHLIST_DIR ] && [ -d "$BK_FILEHASHLIST_DIR" ]; then
+	DIRIN1="$BK_FILEHASHLIST_DIR";
+	vbm "DEBUG:DIRN1 not set, BK_FILEHASHLIST_DIR is dir, so setting DIRIN1 to BK_FILEHASHLIST_DIR:""$BK_FILEHASHLIST_DIR";
+    fi
+
+    # Set defaults
+    if ! [ -v DIGEST_ALGO ]; then # If DIGEST_ALGO is not set then set it to default value of "b2sum"
+	DIGEST_ALGO="b2sum";
+	vbm "DEBUG:DIGEST_ALGO not set. Setting to default value:""$DIGEST_ALGO"
+    fi
+
+    
+    # if [ -v FILEIN1 ]; then # VERBOSE: Display contents of FILEIN1 if FILEIN1 has been set.
+    # 	vbm "DEBUG:main function detects input file:""$FILEIN1" ;
+    # 	vbm "DEBUG:contents of following file is displayed below:""$FILEIN1" ;
+    # 	if [ "$OPTION_VERBOSE" == "true" ]; then # display FILEIN1 contents via cat if verbose mode specified
+    # 	    echoerr "========""$FILEIN1"" START""========" ;
+    # 	    cat "$FILEIN1" 1>&2 ;
+    # 	    echoerr "========""$FILEIN1"" END""========" ;
+    # 	fi
+    # fi
+
+    
+    # Perform work
+    DIGEST="$(getGnucuDigest "$DIGEST_ALGO" "$FILEIN1")" # Calculate digest of FILEIN1
+    vbm "DEBUG:Hash of $FILEIN1 is:""$DIGEST"
+    vbm "DEBUG:Value of DIGEST is:""$DIGEST"
+    vbm "DEBUG:Value of DIRIN1 is:""$DIRIN1"
+    OUTPUT="$(grep -ri "$DIGEST" "$DIRIN1")" # Search contents of DIRIN1 for pattern DIGEST, save results to OUTPUT.
+
+    # Output results
+    echo -e "$OUTPUT"
+
+    if [ -v FILEOUT1 ]; then  # if FILEOUT1 set, write to this file.
+	vbm "DEBUG:main function detects FILEOUT1 set to:""$FILEOUT1" ;
+	echo -e "$OUTPUT" > "$FILEOUT1" ;
+	vbm "DEBUG:main funtion wrote OUTPUT to:""$FILEOUT1" ;
+    elif [ -v DIROUT1 ]; then  # else if DIROUT1 set, set FILEOUT1 to timestamped filename, combine into PATHOUT1, write output to PATHOUT1.
+	vbm "DEBUG:main function detects DIROUT1 set to:""$DIROUT1" ;
+	FILEOUT1="$SCRIPT_TIME_SHORT".."$(basename "$0")".txt
+	PATHOUT1="$DIROUT1"/"$FILEOUT1"
+	echo -e "$OUTPUT" > $PATHOUT1 ;
+	vbm "DEBUG:main function wrote output file to:""$PATHOUT1" ;
+    fi
+
+    # End function
+    vbm "DEBUG:main function ended."
+    return 0; # Function finished.
+}
+
+#== Perform work and exit ==
+main "$@" # Run main function.
+exit 0;
diff --git a/user/bkmusic b/user/bkmusic
new file mode 100755
index 0000000..ebffbb7
--- /dev/null
+++ b/user/bkmusic
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+# Date: 2020-04-28T18:31Z
+# Author: Steven Baltakatei Sandoval
+# Description: Runs mpv to listen to custom playlist generated by cron_vensagusni_day.sh
+
+TARGET_PLAYLIST="/home/baltakatei/Music/music_library_playlist.m3u"
+OUTPUT_LOG_PATH="/home/baltakatei/Sync/kodawkuori-07/2020/archive-PERS/logs/activity/$(date +%Y%m%dT%H%M%S.%N%z)..mpv_history.log"
+OUTPUT_LOG_DIR="$(dirname $OUTPUT_LOG_PATH)"
+
+if ! [ -d "$OUTPUT_LOG_DIR" ]; then
+    echo "ERROR: Output log directory not found:""$OUTPUT_LOG_DIR" 1>&2 ; exit 1;
+fi
+  
+if ! [ -f "$TARGET_PLAYLIST" ]; then
+    echo "ERROR: Playlist file not found:""$TARGET_PLAYLIST" 1>&2 ; exit 1;
+fi
+
+mpv "$TARGET_PLAYLIST" --no-video --log-file="$OUTPUT_LOG_PATH" --msg-time;
+
+exit 0
diff --git a/user/bknpass b/user/bknpass
new file mode 100755
index 0000000..4f53da0
--- /dev/null
+++ b/user/bknpass
@@ -0,0 +1,200 @@
+#!/bin/bash
+
+# Date: 2020-01-20T16:34Z
+#
+# Author: Steven Baltakatei Sandoval (baltakatei.com)
+#
+# License: This bash script, `bknpass`, is licensed under GPLv3 or
+# later by Steven Baltakatei Sandoval:
+#
+#    `bknpass`, an alphanumeric password generator
+#    Copyright (C) 2020  Steven Baltakatei Sandoval (baltakatei.com)
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    A copy of the GNU General Public License may be found at
+#    <https://www.gnu.org/licenses/>.
+#
+# Description: This bash script generates alphanumeric passphrases
+# with a char-count determined by a user-provided number of bits of
+# entropy. The passphrase is then outputted to stdout with a trailing
+# newline. It works as follows:
+# 
+#   - Prompt user for an integer. This integer is the number of bits
+#     of entropy that the generated password should have.
+#
+#   - Check if user-provided string is an integer using `bash` regular
+#     expression test.
+#
+#   - Calculate the minimum number of alphanumeric characters required
+#     to encode the specified number of bits of entropy.
+#
+#       - This step uses `bc` to calculate a logarithm float string
+#         and `awk` to convert the float into an integer, rounding up.
+#
+#   - Use `tr`, `/dev/urandom`, and `head` to generate a random
+#     alphanumeric string with the length calculated in the previous
+#     step.
+#
+#   - Use `echo` to display the passphrase in stdout with a trailing
+#     newline.
+#
+# Dependencies: bash, echo, bc, awk, tr, head. See end of file
+#
+# Tested on:
+#
+#   - GNU/Linux Debian 10
+
+
+#==Initialization==
+
+let ALPHABET_SIZE="26+26+10" # number of unique chars in [:alnum:], argument fed to `tr -c` in 'Generate passphrase' step)
+LOG_BASE=2 # Set logarithm base to 2
+
+# Define `echoerr` function which outputs text to stderr
+    # Note: function copied from https://stackoverflow.com/a/2990533
+function echoerr {
+    echo "$@" 1>&2;
+}
+
+# Define `rpass` function which generates an alphanumeric passphrase of length $1 (ex: `rpass 22` generates a 22-char string)
+    # Note: function adapted from https://www.thegeekstuff.com/2010/04/unix-bash-function-examples/
+function rpass {
+    cat /dev/urandom | LC_ALL=C tr -cd "[:alnum:]" | head -c ${1:-22}
+}
+
+
+#==Main Program==
+
+# Define $ENTROPY_BIT_COUNT1 as argument $1 or prompt user if $1 is not defined.
+    # note: argument test adapted from https://stackoverflow.com/a/6482403
+if [ -z "$1" ]
+then
+    echo "Entropy bit count argument (\$1) not supplied."
+    # Get from user the number of bits of entropy.
+    echoerr -n "Please specify the required strength of the password in bits of entropy (ex: 256):" # prompt via stderr
+    read ENTROPY_BIT_COUNT1
+else
+    ENTROPY_BIT_COUNT1="$1"
+fi
+
+# Check if $ENTROPY_BIT_COUNT1 is an non-negative integer
+    # Note: Regular expression test is adapted from https://stackoverflow.com/a/806923
+RETEST1='^[0-9]+$'
+if ! [[ $ENTROPY_BIT_COUNT1 =~ $RETEST1 ]] ; then
+   echo "error: Not an integer." >&2; exit 1    
+fi
+
+# Calculate minimum count of chars needed to encode $ENTROPY_BIT_COUNT1 with alphabet size of $ALPHABET_SIZE as float
+    # Solve ln(a^n)/ln(2)=b for n using `bc` where
+      # a=$ALPHABET_SIZE
+      # n=$CHAR_COUNT1_FLOAT
+      # b=$ENTROPY_BIT_COUNT1
+    # Note: `bc` logarithm usage adapted from http://phodd.net/gnu-bc/bcfaq.html#bashlog
+CHAR_COUNT1_FLOAT=$(echo "$ENTROPY_BIT_COUNT1*l($LOG_BASE)/l($ALPHABET_SIZE)" | bc -l)
+    # Note: Float will be of form "21.49744370650136860806". This particular float should be rounded to "22" later.
+
+# Round $CHAR_COUNT1_FLOAT1 up to next highest integer for use as argument in later bash functions.
+    # Note: awk expression from https://bits.mdminhazulhaque.io/linux/round-number-in-bash-script.html
+CHAR_COUNT1=$(echo "$CHAR_COUNT1_FLOAT" | awk '{print ($0-int($0)>0)?int($0)+1:int($0)}') 
+
+# Generate passphrase
+PASS1=$(rpass "$CHAR_COUNT1")
+echo -e "$PASS1"
+
+
+#==References==
+#
+# - How to echo a string as stderr instead of stdout.
+#   https://stackoverflow.com/a/2990533
+#   Author: James Roth
+#   Date: 2010-06-07T14:52Z
+#   Date Accessed: 2020-01-20
+#
+# - How to check if script argument exists or not.
+#   https://stackoverflow.com/a/6482403
+#   Author: phoxix
+#   Date: 2011-06-26T05:55Z
+#   Date Accessed: 2020-01-20
+#
+# - How to check that a string is an integer using regular expression test.
+#   https://stackoverflow.com/a/806923
+#   Author: Charles Duffy
+#   Date: 2009-04-30T13:32Z
+#   Date Accessed: 2020-01-20
+#
+# - How to use `bc` to calculate logarithms in Bash
+#   http://phodd.net/gnu-bc/bcfaq.html#bashlog
+#   Author: unknown
+#   Date Accessed: 2020-01-20
+#
+# - How to use `awk` to convert and round up a float to an integer.
+#   https://bits.mdminhazulhaque.io/linux/round-number-in-bash-script.html
+#   Author: Md. Minhazul Haque
+#   Date: 2015-01-09
+#   Date Accessed: 2020-01-20
+#
+# - How to use `/dev/urandom`, `tr`, and `head` to generate a random password in Bash.
+#   https://www.thegeekstuff.com/2010/04/unix-bash-function-examples/
+#   Author: SASIKALA, Ramesh Natarajan
+#   Date: 2010-04-21
+#   Date Accessed: 2020-01-20
+#
+# - Dependencies: bash, echo, bc, awk, tr, head.
+#
+#     - GNU bash, version 5.0.3(1)-release (x86_64-pc-linux-gnu)
+#       Copyright (C) 2019 Free Software Foundation, Inc.
+#       License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
+#       This is free software; you are free to change and redistribute it.
+#       There is NO WARRANTY, to the extent permitted by law.
+#    
+#     - echo (GNU coreutils) 8.30
+#       Copyright (C) 2018 Free Software Foundation, Inc.
+#       License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+#       This is free software: you are free to change and redistribute it.
+#       There is NO WARRANTY, to the extent permitted by law.
+#
+#       Written by Brian Fox and Chet Ramey.
+#    
+#     - bc 1.07.1
+#       Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006, 2008, 2012-2017 Free Software Foundation, Inc.
+#    
+#     - GNU Awk 4.2.1, API: 2.0 (GNU MPFR 4.0.2, GNU MP 6.1.2)
+#       Copyright (C) 1989, 1991-2018 Free Software Foundation.
+#    
+#       This program is free software; you can redistribute it and/or modify
+#       it under the terms of the GNU General Public License as published by
+#       the Free Software Foundation; either version 3 of the License, or
+#       (at your option) any later version.
+#    
+#       This program is distributed in the hope that it will be useful,
+#       but WITHOUT ANY WARRANTY; without even the implied warranty of
+#       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#       GNU General Public License for more details.
+#    
+#       You should have received a copy of the GNU General Public License
+#       along with this program. If not, see http://www.gnu.org/licenses/.
+#    
+#     - tr (GNU coreutils) 8.30
+#       Copyright (C) 2018 Free Software Foundation, Inc.
+#       License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+#       This is free software: you are free to change and redistribute it.
+#       There is NO WARRANTY, to the extent permitted by law.
+#    
+#       Written by Jim Meyering.
+#    
+#     - head (GNU coreutils) 8.30
+#       Copyright (C) 2018 Free Software Foundation, Inc.
+#       License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
+#       This is free software: you are free to change and redistribute it.
+#       There is NO WARRANTY, to the extent permitted by law.
+#    
+#       Written by David MacKenzie and Jim Meyering.
diff --git a/user/bkrandlujvo b/user/bkrandlujvo
new file mode 100755
index 0000000..35e09e8
--- /dev/null
+++ b/user/bkrandlujvo
@@ -0,0 +1,59 @@
+#!/bin/bash
+# usage: bkrandlujvo
+
+INPUT_FILE="/home/baltakatei/Sync/kodawkuori-07/2020/reference-PERS/lojban/20190626..gismu_english_order.txt"
+if [ ! -f "$INPUT_FILE" ]; then echo "ERROR: gismu list text file not found." 2>&1 ; exit 1; fi
+
+randGismuDef () {
+    # usage: randGismuDef [gismu.txt file]
+    # output: <<gismu>>,<<def>>
+    FILE="$1"
+    randLineNum=$(shuf -n1 -i2-$(cat "$FILE" | wc -l)) # Generate random line number of FILE
+    # Output random 2nd space-delimted field (gismu) from file
+    #echo $(cat "$FILE" | cut -d' ' -f2-3 | head -n"$randLineNum" | tail -n1 )
+    echo $(cat "$FILE" | awk '{print $1 "," $3}' | head -n"$randLineNum" | tail -n1 )
+}
+
+randGismu () {
+    # usage: randGismu [gismu.txt file]
+    # output: <<gismu>>
+    FILE="$1"
+    randLineNum=$(shuf -n1 -i2-$(cat "$FILE" | wc -l)) # Generate random line number of FILE
+    # Output random 2nd space-delimted field (gismu) from file
+    echo $(cat "$FILE" | awk '{print $1}' | head -n"$randLineNum" | tail -n1 )
+}
+
+GISMU1=$(randGismu "$INPUT_FILE")
+GISMU2=$(randGismu "$INPUT_FILE")
+GISMU3=$(randGismu "$INPUT_FILE")
+
+#RAW1=$(randGismuDef "$INPUT_FILE")
+#RAW2=$(randGismuDef "$INPUT_FILE")
+#RAW3=$(randGismuDef "$INPUT_FILE")
+
+#GISMU1=$(echo "$RAW1" | cut -d',' -f1)
+#GISMU2=$(echo "$RAW2" | cut -d',' -f1)
+#GISMU3=$(echo "$RAW3" | cut -d',' -f1)
+
+#DEF1=$(echo "$RAW1" | cut -d',' -f2)
+#DEF2=$(echo "$RAW2" | cut -d',' -f2)
+#DEF3=$(echo "$RAW3" | cut -d',' -f2)
+
+echo "$GISMU1 $GISMU2 $GISMU3"
+#echo "$DEF1 $DEF2 $DEF3"
+
+if command -v jbofihe 1>/dev/null 2>&1; then
+    echo "$GISMU1" | jbofihe -x
+    echo "$GISMU2" | jbofihe -x
+    echo "$GISMU3" | jbofihe -x
+else
+    echo "ERROR: jbofihe command not available." 2>&1;
+fi
+
+if command -v jvocuhadju 1>/dev/null 2>&1; then
+    jvocuhadju "$GISMU1" "$GISMU2" "$GISMU3";
+else
+    echo "ERROR: jvocuhadju command not available." 2>&1;
+fi
+
+exit 0
diff --git a/user/bkrandwatch b/user/bkrandwatch
new file mode 100755
index 0000000..f0373a9
--- /dev/null
+++ b/user/bkrandwatch
@@ -0,0 +1 @@
+watch -d -n 1 cat /proc/sys/kernel/random/entropy_avail
diff --git a/user/bkrnd b/user/bkrnd
new file mode 100755
index 0000000..a6846a7
--- /dev/null
+++ b/user/bkrnd
@@ -0,0 +1,5 @@
+#!/bin/bash
+
+# A script that outputs a random 8-digit hexadecimal number to stdout.
+
+LC_ALL=C tr -dc "0123456789abcdef" < /dev/urandom | head -c ${1:-8}
diff --git a/user/bksign b/user/bksign
new file mode 100755
index 0000000..b182008
--- /dev/null
+++ b/user/bksign
@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Date: 2020-05-24T00:47Z
+
+# Author: Steven Baltakatei Sandoval
+
+# Description: A bash script that creates a gpg signature using
+# default key.
+
+# Usage: bksign [ file ]
+
+FILEIN="$1"
+
+# Check that provided argument is a file.
+if ! [ -f "$FILEIN" ]; then
+    echo "ERROR: Invalid filename provided." 2>&1;
+    exit 1;
+fi
+
+# Determine output file name
+FILEOUT="$FILEIN".asc
+gpg  --armor --verbose --output "$FILEOUT" --detach-sign "$FILEIN"
+
+exit 1
diff --git a/user/bkusbreset b/user/bkusbreset
new file mode 100755
index 0000000..4e135f9
--- /dev/null
+++ b/user/bkusbreset
@@ -0,0 +1,24 @@
+#!/bin/bash
+# script to force reset USB devices
+# soruce: http://billauer.co.il/blog/2013/02/usb-reset-ehci-uhci-linux/
+
+
+if [[ $EUID != 0 ]] ; then
+  echo This must be run as root!
+  exit 1
+fi
+
+for xhci in /sys/bus/pci/drivers/?hci_hcd ; do
+
+  if ! cd $xhci ; then
+    echo Weird error. Failed to change directory to $xhci
+    exit 1
+  fi
+
+  echo Resetting devices from $xhci...
+
+  for i in ????:??:??.? ; do
+    echo -n "$i" > unbind
+    echo -n "$i" > bind
+  done
+done
diff --git a/user/bkwpe b/user/bkwpe
new file mode 100755
index 0000000..3b28052
--- /dev/null
+++ b/user/bkwpe
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# 2019-08-14T21:58:08Z; baltakatei>
+
+# The purpose of this script is to open a session of firefox dedicated
+# to editing wikipedia from a remote machine with a public IP address
+# not on Wikipedia's blocklist.
+
+# This script:
+#   1. Creates ssh proxy to remote server
+#   2. Starts Firefox by calling a local installation of firefox via
+#     its own startup script.
+
+# Note: This script does not automatically initialize the default
+# Firefox profile with the correct SOCKS5 settings as can be seen in
+# "Connection Settings" ("Manual proxy configuration", SOCKS
+# Host="127.0.0.1", Port="8080"). These changes must be made manually
+# until an automated method for applying SOCKS settings via edits to
+# `prefs.js` in the default Firefox profile.
+
+# Reference:
+
+# SSH CONNECTION SETTINGS
+REMOTE_USER=baltakatei
+REMOTE_IP=76.102.50.36
+REMOTE_PORT=63865
+LOCAL_PROXY_PORT=8080
+
+# STEP 1: Start an SSH master connection (-M)
+#         in the background (-f)
+#         without running a remote command (-N)
+ssh -p $REMOTE_PORT -M -o ControlPath=/tmp/socks.%r@%h:%p -f -N -D $LOCAL_PROXY_PORT -C $REMOTE_USER@$REMOTE_IP
+
+# STEP 2: Launch Firefox in the foreground
+#/home/baltakatei/Desktop/firefox/firefox -P -no-remote
+/home/baltakatei/Desktop/firefox/firefox -no-remote
+
+# STEP 3: When user is done with Firefox, send an "exit" command to the master connection
+ssh -p $REMOTE_PORT -o ControlPath=/tmp/socks.%r@%h:%p -O exit $REMOTE_USER@$REMOTE_IP
diff --git a/user/bkxz b/user/bkxz
new file mode 100755
index 0000000..465369a
--- /dev/null
+++ b/user/bkxz
@@ -0,0 +1,39 @@
+#!/bin/bash
+
+# Date: 2020-04-09T00:09Z
+
+# Author: Steven Baltakatei Sandoval
+
+# Description: Compresses a file or directory using xz at max
+# settings. Saves compressed .tar.xz file in the same directory as the
+# original file.
+
+# Usage: bkxz [ file or dir ]
+
+echoerr() { echo "$@" 1>&2; } # Define error display function.
+
+TARGET="$1" # Identify first argument as target file or directory.
+
+if ! command -v tar >/dev/null 2>&1; then # Check that 'tar' command exists.
+    echoerr "ERROR: Command doesn't exist: tar";
+fi
+
+if ! command -v xz >/dev/null 2>&1; then # check that 'xz' command exist.
+    echoerr "ERROR: Command doesn't exist: xz. Suggestion: Install 'xz-utils' package.";
+    exit 1;
+fi
+
+if ! ( [ -f "$TARGET" ] || [ -d "$TARGET" ] ); then # check that TARGET is a file or dir.
+    echoerr "ERROR: Target is not a file or dir."; exit 1;
+fi
+
+
+TARGET_BASENAME="$(basename "$TARGET")" # Save name of target's basename (ex: 'input.txt' from '/tmp/input.txt').
+TARGET_DIRNAME="$(dirname "$TARGET")" # Save name of target's directory (ex: '/tmp' from '/tmp/input.txt').
+
+OUTPUT="$TARGET_DIRNAME"/"$TARGET_BASENAME".tar.xz # Define output file to be in same location as target but with .tar.xz extension.
+
+pushd "$TARGET_DIRNAME" 1>/dev/null 2>&1 # Temporarily navigate to directory holding TARGET.
+tar cf - "$TARGET_BASENAME" | xz -9e --lzma2=dict=1536MiB,mf=bt4,nice=273,depth=1000 > "$OUTPUT"
+echoerr "Archive saved at: $OUTPUT"
+popd 1>/dev/null 2>&1 # Return to original working directory.
diff --git a/user/bkytdl b/user/bkytdl
new file mode 100755
index 0000000..1e93586
--- /dev/null
+++ b/user/bkytdl
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+youtube-dl -f 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best' -o '%(upload_date)s_%(id)s..%(channel)s,_%(title)s.%(ext)s' --restrict-filenames $@
diff --git a/user/bkytpldl b/user/bkytpldl
new file mode 100755
index 0000000..67d20a0
--- /dev/null
+++ b/user/bkytpldl
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+#Sync Youtube playlist "cukta-2019Q4"
+#bash ~/Sync/baltakatei_bin/youtube-playlist-sync -l https://www.youtube.com/playlist?list=PL840bf-Yx7uabEhowgn-e2CYoqdVOJ8uF -d ~/Sync/kodawkuori-07/2019/videos-PERS/internet/youtube
+
+#Sync Youtube playlist "cukta-2020Q1"
+#bash ~/Sync/baltakatei_bin/youtube-playlist-sync -l https://www.youtube.com/playlist?list=PL840bf-Yx7uY8JAHFfBJ1poRfWHy25AUE -d ~/Sync/kodawkuori-07/2020/videos-PERS/internet/youtube
+
+#Sync Youtube playlist "cukta-2020Q2"
+bash ~/Sync/baltakatei_bin/youtube-playlist-sync -l https://www.youtube.com/playlist?list=PL840bf-Yx7uaW5cj_l24b8v2DZek5Nwv5 -d ~/Sync/kodawkuori-07/2020/videos-PERS/internet/youtube/cukta-2020Q2