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A copy of all installed debian packages on your system will be put back together, with all changes in configuration files you made and placed in the current directory. Make sure you have enough disk space (say 2-3 GB). Break any time with Ctrl+C. Show Sample Output
-1for a in $(sudo dpkg --get-selections|cut -f1); do dpkg-repack $a|awk '{if (system("sleep .5 && exit 2") != 2) exit; print}';done -
0find . -name "*.ipynb" -exec grep -l "symspellpy" {} \;
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move filename/rename filenames with Uppercase to lowercase in current directory Show Sample Output
0FileList=$(ls); for FName in $FileList; do LowerFName=$(echo "$FName" | tr '[:upper:]' '[:lower:]'); echo $FName" rename/move to $LowerFName"; mv $FName $LowerFName; done -
get the SHA256 sum signatur for a file Show Sample Output
0openssl dgst -sha256 <FILENAME> -
0echo "File;Creator;Producer";find . -name '*.pdf' -print0 | while IFS= read -d $'\0' line;do echo -n "$line;";pdfinfo "$line"|perl -ne 'if(/^(Creator|Producer):\s*(.*)$/){print"$2";if ($1 eq "Producer"){exit}else{print";"}}';echo;done 2>/dev/null
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ZSH ships a couple random number generators via the $RANDOM environment variable and rand48() via zsh/mathfunc, but neither are cryptographically secure. This code produces a 32-bit random number suitable for cryptography. It's only dependency is /dev/urandom and it does not rely on any shell commands or 3rd party utilities. It assumes ZSH was compiled with 64-bit integer support. Show Sample Output
1srandom() { zmodload zsh/system; local byte; local -i rnd=0; repeat 4; do sysread -s 1 byte || return; rnd=$(( rnd << 8 | #byte )); done < /dev/urandom; print -r -- $rnd; } -
0for i in *.*; do 7z a "$i".7z "$i"; done
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if you want to move with command mv large list of files than you would get following error /bin/mv: Argument list too long alternavite with exec: find /source/directory -mindepth 1 -maxdepth 1 -name '*' -exec mv {} /target/directory \; Show Sample Output
1find /source/directory -mindepth 1 -maxdepth 1 -name '*' -print0 | xargs -0 mv -t /target/directory; -
This script finds all git objects and `git cat-file`'s their content. This is really just a helper function to play around with the internals of git repositories. See https://git-scm.com/book/en/v2/Git-Internals-Git-Objects of more info. Show Sample Output
0find .git/objects/ -type f \| sed 's/\.git\/objects\/\///' | sed 's/\///g' | xargs -n1 -I% echo echo "%" \$\(git cat-file -p "%"\) \0 | xargs -n1 -0 sh -c -
Use this command if you want to rename all subtitles for them to have the same name as the mp4 files. NOTE: The order of "ls -1 *.mp4" must match the order of "ls -1 *.srt", run the command bellow to make sure the *.srt files will really match the movies after run this command: paste -d:
4paste -d: <(ls -1 *.mp4) <(ls -1 *.srt) | while read line; do movie="${line%%:*}"; subtitle="${line##*:}"; mv "${subtitle}" "${movie%.*}.srt"; done -
sometimes I need list from path with max limit for recursive depth directory listing
2tree -L 2 -u -g -p -d -
apt install toilet toilet-fonts # replace 'tput setaf 1' with 'tput setaf 9' to change color-2tput setaf 1;tput rev;h=$(tput lines);w=$[$(tput cols)/6];c=$(seq -ws '_____|' $[$w+1]|tr -d "0-9");for a in $(seq $[$h/2]);do echo $c;echo ${c//|___/___|};done;tput cup 0;toilet -t -f bigmono12 "?LOVE";tput cup $h -
while dumping database if you see following error/warning than you have to repair broken tables/rows Show Sample Output
3mysqlcheck --repair --all-databases -u root -p<PASSWORD> -
generating self signed ssl certificate to use in dovecot postfix nginx Self signed certificates can be used for private encryptions between server and client and must be manually accepted on browser/ client Show Sample Output
1openssl req -newkey rsa:2048 -nodes -keyout /etc/ssl/private/myblog.key -x509 -days 365 -out /etc/ssl/private/myblog.pem -
2docker images --format "{{.Repository}}:{{.Tag}}" | grep ':latest' | xargs -L1 docker pull
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Change the original date set by camera : Create Date : 2020:08:21 13:26:24.63 //Operating System: Date Created (ie: sdcard) Date/Time Original : 2020:08:21 13:26:24.63 // Set by camrea when you point and click for photo Modify Date : 2020:08:21 13:26:24.63 //Operating System: Modified (ie: sdcard) Exif argument examples are : exiftool.exe “-DateTimeOriginal+=0:0:0 5:30:0” filename.jpg (add 5 hours and 30 minutes to the Exif Date/Time Original) exiftool.exe" "-modifydate-=0:0:0 0:25:0" filename.jpg (reduce the Exif Modify Date to 25 minutes) exiftool.exe “-AllDates+=Y:M:D h:m:s” filename.jpg (Change all exif date values to Y:M:D h:m:s) Show Sample Output
0"exiftool(-k).exe" "-DateTimeOriginal-=0:0:0 0:25:0" . -
5lscpu | egrep 'Model name|Socket|Thread|NUMA|CPU\(s\)'
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1find . -type f -regex '.*\.\(cpp\|h\)' -exec file {} + | grep "UTF-8\|extended-ASCII"
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0find . -type f -regex '.*\.\(cpp\|h\)' -exec sed -i 's/^[[:blank:]]\+$//g' {} +
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1glxinfo |grep -i -o 'device|memory\|[0-9]\{1,12\} MB'|head -n 1
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If you have two sets of files that may share hard-linked files, it can be useful to identify which ones are hard links to same underlying inode (file). This command shows you all of those, sorted by inode#. In my example the two directory trees to compare share a common parent, so I run the command in that parent and just use
find .to start from the current directory. If yours are in different locations, you can pass both paths to find:find /directory1 /directory2 -type f -printf '%10i %p\n' | sort | uniq -w 11 -d -D | lessShow Sample Output0find . -type f -printf '%10i %p\n' | sort | uniq -w 11 -d -D | less -
0find . -type f -exec grep -Iq . {} \; -exec grep -oE "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)" {} /dev/null \;
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One liner is based on this article: https://www.computerhope.com/issues/ch001307.htm Show Sample Output
-3lspci|grep -i "VGA Compatible Controller"|cut -d' ' -f1|xargs lspci -v -s|grep ' prefetchable' -
This way you don't need to replace first line of a bash foo.sh script #!/bin/bash with #!/bin/bash -x to obtain the same effect
-1bash -x foo.sh -
1a=7; echo $a; echo "$a"; echo '$a'; echo "'$a'"; echo '"$a"'
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