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Commands tagged bash from sorted by
Terminal - Commands tagged bash - 725 results
function colorize() { c="--line-buffered --color=yes"; GREP_COLORS="mt=01;34" egrep $c '(^| 200 | 304 )' "${@}" | GREP_COLORS="mt=02;31" egrep $c '(^|"(GET|POST) .*[^0-9] 4[0-1][0-9] )' | GREP_COLORS="ms=02;37" egrep $c '(^|^[0-9\.]+) ';}
2013-08-14 21:05:34
User: mogsie
Functions: egrep
1

Puts a splash of color in your access logs. IP addresses are gray, 200 and 304 are green, all 4xx errors are red. Works well with e.g. "colorize access_log | less -R" if you want to see your colors while paging.

Use as inspiration for other things you might be tailing, like syslog or vmstat

Usage:

tail -f access.log | colorize
alias 2edit='xsel -b;n=pipe$RANDOM;xdotool exec --terminator -- mousepad $n -- search --sync --onlyvisible --name $n key --window %1 ctrl+v'
2013-08-11 06:18:31
User: ichbins
Functions: alias exec
1

bash output is inserted into the clipboard, then mousepad is started and the clipboard content is pasted. xsel and xdotool needs to be installed. Instead of the mousepad any other editor can be used. I've successfully tested the Sublime Text Editor and it opens a new tab for each new paste. Check Sample output for a usage example. This command is originated from here - http://goo.gl/0q9UT4

if [[ ":$PATH:" != *":$dir:"* ]]; then PATH=${PATH}:$dir; fi
2013-08-11 01:19:13
User: dmmst19
Tags: bash PATH $PATH
9

Sometimes in a script you want to make sure that a directory is in the path, and add it in if it's not already there. In this example, $dir contains the new directory you want to add to the path if it's not already present.

There are multiple ways to do this, but this one is a nice clean shell-internal approach. I based it on http://stackoverflow.com/a/1397020.

You can also do it using tr to separate the path into lines and grep -x to look for exact matches, like this:

if ! $(echo "$PATH" | tr ":" "\n" | grep -qx "$dir") ; then PATH=$PATH:$dir ; fi

which I got from http://stackoverflow.com/a/5048977.

Or replace the "echo | tr" part with a shell parameter expansion, like

if ! $(echo "${PATH//:/$'\n'}" | grep -qx "$dir") ; then PATH=$PATH:$dir ; fi

which I got from http://www.commandlinefu.com/commands/view/3209/.

There are also other more regex-y ways to do it, but I find the ones listed here easiest to follow.

Note some of this is specific to the bash shell.

open() { explorer /e, $(cygpath -wap "${1:-$PWD}"); }
2013-08-08 14:49:15
User: applemcg
0

use the shell default positional parameter syntax ${X:-default} in lieu of testing.

$ ps -LF -u user
2013-08-06 21:50:48
User: jld
Functions: ps
Tags: bash processes
0

Piping ps into grep is mostly useless: ps has its own filter options like -u and -C

for i in '/tmp/file 1.txt' '/tmp/file 2.jpg'; do ln -s "$i" "$i LINK"; done
2013-08-02 08:30:50
User: qwertyroot
Functions: ln
0

Replace

'/tmp/file 1.txt' '/tmp/file 2.jpg'

with

"$NAUTILUS_SCRIPT_SELECTED_FILE_PATHS"

for Nautilus script

Or with

%F

for Thunar action

If you linking the symlinks itself, but want to link to source files instead of symlinks, use

"`readlink -m "$i"`"

instead of

"$i"

like this:

for i in '/tmp/file 1.txt' '/tmp/file 2.jpg'; do ln -s "`readlink -m "$i"`" "$i LINK"; done

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

for fil in *.JPG; do datepath="$(identify -verbose $fil | grep DateTimeOri | awk '{print $2"_"$3 }' | sed s%:%_%g)"; mv -v $fil $datepath.jpg; done
2013-08-02 01:42:04
Functions: mv
0

Requires ImageMagick.

Extracts date taken from image and renames it properly.

Based on StackOverflow answer.

rhost() { if [[ $1 =~ ^[0-9]+$ ]]; then sed -i "$1"d ${HOME}/.ssh/known_hosts; else echo "rhost [n]"; fi }
2013-08-01 21:10:34
User: lowjax
Functions: echo sed
-1

Quickly remove the conflicting line (key) from current users known_hosts file when there is an SSH host conflict. Very nice when you get tired of writing out full commands. Ideally you would place this into your .bash_profile

Usage: rhost [n]

Example: rhost 33 (removes line 33 from ~/.ssh/known_hosts)

Function assumes the $HOME exists, you could alternatively use "~/.ssh/known_hosts"

Mac OSX likes a space for sed -i "$1" d

open(){ if [[ -n "$1" ]];then explorer /e, $(cygpath -mal "$PWD/$1");else explorer /e, $(cygpath -mal "$PWD");fi }
2013-07-31 01:15:14
User: lowjax
1

This alternative either opens the current working directory by just issuing the open function in the commandline. Or you can specify what directory you would like to open.

Example: open /cygdrive/c/Windows

Usage: open [path]

When no option is specified it will open the current working directory

for m in `df -P | awk -F ' ' '{print $NF}' | sed -e "1d"`;do n=`df -P | grep "$m$" | awk -F ' ' '{print $5}' | cut -d% -f1`;i=0;if [[ $n =~ ^-?[0-9]+$ ]];then printf '%-25s' $m;while [ $i -lt $n ];do echo -n '=';let "i=$i+1";done;echo " $n";fi;done
2013-07-29 20:12:39
User: drockney
Functions: awk cut echo grep printf sed
Tags: bash
5

Automatically drops mount points that have non-numeric sizes (e.g. /proc). Tested in bash on Linux and AIX.

echo -e "\e[3$(( $RANDOM * 6 / 32767 + 1 ))mHello World!"
2013-07-28 13:01:12
User: nst
Functions: echo
Tags: bash color random
0

The expression $(( $RANDOM * 6 / 32767 + 1 )) generates a random number between 1 and 6, which is then inserted into the escape sequence \e[3_m to switch the foreground color of the terminal to either red, green, yellow, blue, purple or cyan.

The color can be reset using the escape sequence \e[0m.

The full list of colors can be found here: https://wiki.archlinux.org/index.php/Color_Bash_Prompt#List_of_colors_for_prompt_and_Bash

for i in {1..31}; do ls -1 *${YYYY}${MM}`printf "%02d" $i`* | wc -l; done
2013-07-26 07:08:04
User: Paulus
Functions: ls wc
Tags: bash Linux
0

RU: Найдет число файлов в папке по данной маске в цикле по дням месяца

du -m --max-depth=1 [DIR] | sort -nr
ps -eLF | grep ^user
2013-07-24 09:53:12
User: balsagoth
Functions: grep ps
Tags: bash processes
0

This shows all process (-e) and threads (-L) in full format (-F)

link=https://www.dropbox.com/login ; curl -b a -c cookie -d "t=$(curl -c a $link | sed -rn 's/.*TOKEN: "([^"]*).*/\1/p')&login_email=me%40yahoo.com&login_password=my_passwd" $link
2013-07-12 07:43:21
User: nixnax
Functions: link
1

Use the command line to log into Dropbox. You have to replace me@yahoo.com with your Dropbox email (note the URL-encoding of "@" as %40). Also replace my_passwd with your Dropbox password. (Note: special characters in your password (such as #) must be url-encoded. You will get a cookie (stored in file "cookie") that you can use for subsequent curl operations to dropbox, for example curl -b cookie https://www.dropbox.com/home. Debug note: If you want to see what data curl posts, use curl's --trace-ascii flag.

while curl -dsL example.com 2>&1 | grep 503;do sleep 8;done;echo server up
mogrify -resize SIZE_IN_PIXELS *.jpg
2013-07-05 14:14:04
User: o0110o
-1

Batch resize all images to a width of 'X' pixels while maintaing the aspect ratio.

This makes uses of ImageMagick to make life easier.

for y in {2009..2013}; do cal $y; done
find . -empty -type d -print0 | xargs -0 rmdir -p
2013-07-01 02:44:57
User: rafar
Functions: find rmdir xargs
0

It starts in the current working directory.

It removes the empty directory and its ancestors (unless the ancestor contains other elements than the empty directory itself).

It will print a failure message for every directory that isn't empty.

This command handles correctly directory names containing single or double quotes, spaces or newlines.

If you do not want only to remove all the ancestors, just use:

find . -empty -type d -print0 | xargs -0 rmdir
find . -type f ! -path \*CVS\* -exec rm {} \; -exec cvs remove {} \;
2013-06-28 20:17:40
User: jasonsydes
Functions: cvs find rm
Tags: bash cvs delete rm
0

This command removes and then cvs removes all files in the current directory recursively.

while true; do curl -vsL -o /dev/null example.com 2>&1 | grep 503 > /dev/null || echo "OK: server is up."; sleep 8; done
echo $[RANDOM % 2]
echo $[RANDOM % 100] # range 0-99
2013-05-25 19:02:00
User: anapsix
Functions: echo
-2

use it to stagger cronjob or to get a random number

increase the range by replacing 100 with your own max value

du -mx [directory] | grep -P '^\d{4}' | sort -rn
2013-05-24 09:52:41
User: mc0e
Functions: du grep sort
Tags: bash Linux du
0

I don't like doing a massive sort on all the directory names just to get a small set of them. the above shows a sorted list of all directories over 1GB. use head as well if you want.

du's "-x" flag limits this to one file system. That's mostly useful when you run it on "/" but don't want "/proc" and "/dev" and so forth. Remember though that it will also exclude "/home" or "/var" if those are separate partitions.

the "-a" option is often useful too, for listing large files as well as large directories. Might be slower.

du -xB M --max-depth=2 /var | sort -rn | head -n 15