Commands tagged bash sorted by votes

Commands tagged bash (821)

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Purge frozen messages in Exim
This is sample output - yours may be different.
-2

exipick -zi | xargs exim -Mrm

markszabo · 2010-01-13 21:53:43 3

Blinking, Color Highlighted search for input/output and files, like grep --color

hb(){ sed "s/$$*$/`tput setaf 2;tput setab 0;tput blink`\1`tput sgr0`/gI"; } hb blinks, hc does a reverse color with background.. both very nice. hc(){ sed "s/$$*$/`tput setaf 0;tput setab 6`\1`tput sgr0`/gI"; } Run this: command ps -Hacl -F S -A f | hc ".*$PPID.*" | hb ".*$$.*" Your welcome ;) From my bash profile - http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html Show Sample Output

-2

hb(){ sed "s/$$*$/`tput setaf 2;tput setab 0;tput blink`\1`tput sgr0`/gI"; }

AskApache · 2010-04-07 08:45:26 4

Update many subversion projects which reside in one directory

If you have a directory with many working copies of various subversion projects and you want to update them all at once, this one may be for you. Show Sample Output
This is sample output - yours may be different.
```
Authentication realm: <https://foo.com:443> foo-project
Password for 'foodoo': 
At revision 221.
```
-2

for d in $(find . -maxdepth 1 -type d -name '[^.]*'); do cd "$d"; svn up; cd ..; done

udog · 2010-05-28 10:09:19 3
Generate background office noise using Digg feeds and OSX.

Instead of having someone else read you the Digg headlines, Have OSX do it. Requires Curl+Sed+Say. This could probably be easily modified to use espeak for Linux.
This is sample output - yours may be different.
-2

IFS=`echo -en "\n\b"`; for i in $(curl http://feeds.digg.com/digg/container/technology/popular.rss | grep '<title>' | sed -e 's#<[^>]*>##g' | tail -n10); do echo $i; echo $i | sed 's/^/Did you hear about /g' | say; sleep 30; done

echosedawk · 2010-06-07 22:16:19 4
Remove executable bit from all files in the current directory recursively, excluding other directories, firm permissions
This is sample output - yours may be different.
-2

find . -type f -exec chmod 640 {} ';'

lionping · 2010-07-18 21:03:38 4
Show all cowsay's available cowfiles
This is sample output - yours may be different.
-2

cowsay -l | sed '1d;s/ /\n/g' | while read f; do cowsay -f $f $f;done

fizz · 2010-09-06 03:40:42 4
Selecting a random file/folder of a folder

Choose random file from current folder. Avoids using ls.
This is sample output - yours may be different.
-2

for i in *; do echo "$i"; done | shuf -n1

johnraff · 2011-03-17 17:48:42 6
BASH: Print shell variable into AWK

BASH: Print shell variable into AWK
This is sample output - yours may be different.
-2

VAR="foo" ; awk '{ print '"$VAR"' }'

FRUiT · 2011-04-15 07:56:20 3
Colour part of your prompt red to indicate an error
This is sample output - yours may be different.
-2

export PS1='[\[\e[36;1m\]\u@\[\e[32;1m\]\h \[\e[31;1m\]\w]# \[\e[0m\]'

bakhru · 2011-04-16 00:58:51 5
Echo PID of the current running command

Actually $! is an internal variable containing PID of the last job in background. More info: http://tldp.org/LDP/abs/html/internalvariables.html#PIDVARREF Using $! for job control: possibly_hanging_job & { sleep ${TIMEOUT}; eval 'kill -9 $!' &> /dev/null; }
This is sample output - yours may be different.
-2

command & echo $!

Mahrud · 2011-06-08 18:16:38 3
add title and alt-text to your collection of xkcd comics

full command: for fn in xkcd*.png xkcd*.jpg; do; echo $fn; read xw xh <<<$(identify -format '%w %h' $fn); nn="$(echo $fn | sed 's/xkcd-$[0-9]\+$-.*/\1/')"; wget -q -O xkcd-${nn}.json http://xkcd.com/$nn/info.0.json; tt="$(sed 's/.*"title": "$[^"]*$", .*/\1/' xkcd-${nn}.json)"; at="$(sed 's/.*alt": "$.*$", .*/\1/' xkcd-${nn}.json)"; convert -background white -fill black -font /usr/share/fonts/truetype/freefont/FreeSansBold.ttf -pointsize 26 -size ${xw}x -gravity Center caption:"$tt" tt.png; convert -background '#FFF9BD' -border 1x1 -bordercolor black -fill black -font /usr/share/fonts/truetype/freefont/FreeSans.ttf -pointsize 16 -size $(($xw - 2))x -gravity Center caption:"$at" at.png; th=$(identify -format '%h' tt.png); ah=$(identify -format '%h' at.png); convert -size ${xw}x$(($xh+$th+$ah+5)) "xc:white" tt.png -geometry +0+0 -composite $fn -geometry +0+$th -composite at.png -geometry +0+$(($th+$xh+5)) -composite ${fn%\.*}_cmp.png; echo -e "$fn $nn $xw $xh $th $ah \n$tt \n$at\n"; done this assumes that all comics are saved as xkcd-[number]-[title].{png|jpg}. it will then download the title and alt-text, create pictures from them, and put everything together in a new png-file. it's not perfect, but it worked for nearly all my comics. it uses the xkcd-json-interface. though it's poorly written, it doesn't completely break on http://xkcd.com/859/
This is sample output - yours may be different.
-2

for fn in xkcd*.png xkcd*.jpg; do echo $fn; read xw xh <<<$(identify -format '%w %h' $fn); nn="$(echo $fn | sed 's/xkcd-$[^-]\+$-.*/\1/')"; wget -q -O xkcd-${nn}.json http://xkcd.com/$nn/info.0.json; tt="$(sed 's/.*"title": "$[^"]\+$",.*/\1/' ...

fpunktk · 2012-01-06 20:26:11 8
Convert all the symbolic links in $PWD to copies of the referenced files
This is sample output - yours may be different.
-2

for FILE in `ls -1`; do if [ -L "$FILE" ]; then cp $(readlink "$FILE") ${FILE}_rf; rm -f $FILE; mv ${FILE}_rf "$FILE"; fi; done

unixmonkey1907 · 2012-01-16 16:39:41 6
creates or attachs to screen

Tries to reattach to screen, if it's not available, creates one. created an alias "irc" for it, since sometimes i forget if there already is a screen session running with irssi, this way I avoid creating a new one by mistake.
This is sample output - yours may be different.
-2

screen -r irc || screen -S irc irssi

daneoshiga · 2012-10-19 12:12:54 5
Bash function do emulate send to trash files

# put into .bashrc function trash() { if [ -z "$*" ] ; then echo "Usage: trash filename" else local TRASH="${HOME}/.local/share/Trash" if [ ! -d "$TRASH/files" ]; then mkdir -p "$TRASH/files"; fi if [ ! -d "$TRASH/info" ]; then mkdir -p "$TRASH/info"; fi local IFS_BKP=$IFS IFS=' ' for FILE in $@ ; do local BASE=$( basename "$FILE" ) local TRASH_NAME="$BASE" local COUNTER=1 while [ -e "$TRASH/files/$TRASH_NAME" ]; do COUNTER=`expr $COUNTER + 1` TRASH_NAME="$BASE.$COUNTER" done local FULL_PATH=$( readlink -f "$FILE" ) local DATE=$( date +%Y-%m-%dT%H:%M:%S ) mv "$FULL_PATH" "$TRASH/files/$TRASH_NAME" if [ $? -eq 0 ]; then echo "[Trash Info] Path=$FULL_PATH DeletionDate=$DATE" > "$TRASH/info/$TRASH_NAME.trashinfo" fi done IFS=$IFS_BKP fi }
This is sample output - yours may be different.
-2

trash <file>

bkmeneguello · 2012-11-22 18:05:11 4
Find out if a module is installed in perl

This version uses a bash function and does not print the path to the module. Show Sample Output
This is sample output - yours may be different.
```
$ module_exists diagnostics && echo yes || echo no
yes

$ module_exists beeblebrox && echo yes || echo no
no
```
-2

module_exists(){ perl -e 'use '$1 2>/dev/null; }

putnamhill · 2013-01-11 14:47:07 4
How to execute and encrypted and password-protected bash script?

echo "ls" > script.bash; This is my script, a simple 'ls'. gpg -c script.bash; Here I encrypt and passord-protect my script. This creates file script.bash.gpg. cat script.bash.gpg | gpg -d --no-mdc-warning | bash Here I open file script.bash.gpg, decrypt it and execute it.
This is sample output - yours may be different.
-2

echo "ls" > script.bash; gpg -c script.bash; cat script.bash.gpg | gpg -d --no-mdc-warning | bash

betsubetsu · 2013-03-10 09:34:12 9
get a random number in bash

use it to stagger cronjob or to get a random number increase the range by replacing 100 with your own max value Show Sample Output
This is sample output - yours may be different.
```
bash-4.1$ echo $[RANDOM % 100]
89
```
-2

echo $[RANDOM % 100] # range 0-99

anapsix · 2013-05-25 19:02:00 9
One command line web server on port 80 using nc (netcat)

-k, --keep-open will keep connection alive, and we could exclude using 'while true' nc is such a powerful command, it could be used instead of any OS! :p Show Sample Output
This is sample output - yours may be different.
```
/home/me> curl -i localhost:5432
HTTP/1.1 200 OK
Tue Nov 12 15:40:27 EET 2013


<p>How are you today?</p>
```
-2

nc -kl 5432 -c 'echo -e "HTTP/1.1 200 OK\r\n$(date)\r\n\r\n";echo "<p>How are you today?</p>"'

gvitalie · 2013-11-12 14:00:11 7
Move files older than 30 days in current folder to

Use find's built-in "exec" option to avoid having to do any weirdness with quoting.
This is sample output - yours may be different.
-2

find . -mtime +30 -exec mv {} old/ \;

minnmass · 2014-02-09 23:05:41 9
Generrate Cryptographically Secure RANDOM PASSWORD

Change :alnum: to :graph: for all printable characters Show Sample Output
This is sample output - yours may be different.
```
FH170AB1DXb4dHlX
```
-2

cat /dev/urandom |tr -c -d '[:alnum:]'|head -c 16;echo

AndrewM · 2019-06-17 17:51:04 36
Alias to list all functions loaded into bash (that don't start with _). Also shows file it's defined in.

Should run anywhere that Bash works.. Your mileage may vary. Show Sample Output
This is sample output - yours may be different.
```
cclock                       206  /home/myuser/.functions.sh
chmodd                       236  /home/myuser/.functions.sh
chmodf                       242  /home/myuser/.functions.sh
cmdfu                        41   /home/myuser/.functions.sh
command_not_found_handle     58   /etc/bash.bashrc
dequote                      148  /usr/share/bash-completion/bash_completion
dmesg_with_human_timestamps  252  /home/myuser/.functions.sh
```
-2

alias functions='shopt -s extdebug;declare -F | grep -v "declare -f _" | declare -F $(awk "{print $3}") | column -t;shopt -u extdebug'

goeltzec · 2021-11-22 06:49:36 426
A bash prompt which shows the bash-version

The colors are defined as variables. e.g. RED="\[\033[01;31m\]" BLUE="\[\033[01;34m\]" Show Sample Output
This is sample output - yours may be different.
```
[p17@debian-bash 3.2:~] $
```
-3

PS1="$BLUE[$CYAN\u$BLUE@$CYAN\h$WHITE-bash \v:$GREEN\w$BLUE]$WHITE \$ "

P17 · 2009-05-06 08:01:06 6
urlencode

curl doesn't provide url-encoding for 'GET' data, it have an option '--data-urlencode', but its only for 'POST' data. Thats why I need to write down this commandline. With 'perl', 'php' and 'python', this is one liner, but just I wrote it for fun. Works in Ubuntu, will work in all linux varients(I hope it will work in unix varients also). Show Sample Output
This is sample output - yours may be different.
```
$ sed -e's/./&\n/g' -e's/ /%20/g' | grep -v '^$' | while read CHAR; do test "${CHAR}" = "%20" && echo "${CHAR}" || echo "${CHAR}" | grep -E '[-[:alnum:]!*.'"'"'()]|\[|\]' || echo -n "${CHAR}" | od -t x1 | tr ' ' '\n' | grep '^[[:alnum:]]\{2\}$' | tr '[a-z]' '[A-Z]' | sed -e's/^/%/g'; done | sed -e's/%20/+/g' | tr -d '\n'; echo
http://www.google.com
http%3A%2F%2Fwww.google.com
$
```
-3

(Command too long..See sample Output..)

mohan43u · 2009-06-14 20:34:37 136
Print a row of 50 hyphens

In bash, by pressing ALT+n and then a character x, x will be printed n times I know is not the same as the original command, but is correlated. Show Sample Output
This is sample output - yours may be different.
```
$ --------------------------------------------------
```
-3

<alt+50>-

kobayashison · 2010-01-07 15:32:47 5
mkdir & cd into it as single command

combines mkdir and cd added quotes around $_, thanx to flatcap! Show Sample Output
This is sample output - yours may be different.
```
~/#$ mkcd /path/to/new/folder
/path/to/new/folder#$_
```
-3

echo 'mkcd() { mkdir -p "$@" && cd "$_"; }' >> ~/.bashrc

phaidros · 2010-01-13 09:37:56 4
‹ First < 29 30 31 32 33 >

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ssh: change directory while connecting

Useful to create an alias that sends you right in the directory you want : alias server-etc="ssh -t server 'cd /etc && $SHELL'"

get colorful side-by-side diffs of files in svn with vim

This will diff your local version of the file with the latest version in svn. I put this in a shell function like so: $svd() { vimdiff

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Get a Bulleted List of SVN Commits By a User for a Specifc Day (Daily Work Log)

* Replace USERNAME with the desired svn username * Replace the first YYYY-MM-DD with the date you want to get the log (this starts at the midnight event that starts this date) * Replace the second YYYY-MM-DD with the date after you want to get the log (this will end the log scan on midnight of the previous day) Example, if I want the log for December 10, 2010, I would put {2010-12-10}:{2010-12-11}

Kill all Zombie processes (Guaranteed!)

It identifies the parents of the Zombie processes and kill them. So the new parent of orphan Zombies will be the Init process and he is already waiting for reaping them. Be careful! It may also kill your useful processes just because they are not taking care and waiting for their children (bad parents!).

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

umount --rbind mount with submounts

Original: https://bugzilla.redhat.com/show_bug.cgi?id=194342

Grabs the complete module list from CPAN, pulls the first column, ditches html lines, counts, ditches small namespaces.

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

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Commands tagged bash (821)

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