Commands using set sorted by votes

Commands using set (54)

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Put readline into vi mode

This lets you use your favorite vi edit keys to navigate your term. To set it permanently, put "set editing-mode vi" in your ~/.inputrc or /etc/inputrc.
This is sample output - yours may be different.
20

set -o vi

Viaken · 2009-03-20 16:29:03 10
Turns red the stderr output

Reference: http://stackoverflow.com/a/4455706 Show Sample Output
This is sample output - yours may be different.
```
color ls <non existent path>
```
10

color()(set -o pipefail;"$@" 2>&1>&3|sed $'s,.*,\e[31m&\e[m,'>&2)3>&1

bkmeneguello · 2013-01-30 13:42:03 5
make image semi-transparent
This is sample output - yours may be different.
9

convert input.png -alpha set -channel A -fx 0.5 output.png

kev · 2011-08-25 16:12:38 32
Robust expansion (i.e. crash) of bash variables with a typo

By default bash expands an unbound variable to an empty string. This can be dangerous, if a critical variable name (a path prefix for example) has a typo. The -u option causes bash to treat this as an error, and the -e option causes it to exit in case of an error. These two together will make your scripts a lot safer against typos. The default behaviour can be explicitly requested using the ${NAME:-} syntax. A (less explicit) variation: #!/bin/bash -eu Show Sample Output
This is sample output - yours may be different.
```
$ cat safe-cacheclean.sh 
#!/bin/bash

set -eu
CACHEDIR=mycache
# a dangerous-looking typo, is /bin going to disappear:
rm -rf "$CACHEDI/bin"

$ ./safe-cacheclean.sh 
./safe-cacheclean.sh: line 7: CACHEDI: unbound variable
```
8

set -eu

wipu · 2010-04-07 11:54:40 7
prevents replace an existing file by mistake

Use set +o noclobber and you will be able to replace files again Show Sample Output
This is sample output - yours may be different.
```
$ > important
$ set -o noclobber
$ date >> important
$ date > important
bash: important: cannot overwrite existing file
```
7

set -o noclobber

vududevil · 2009-03-10 01:39:18 3
use vi key bindings at the command line
This is sample output - yours may be different.
5

set -o vi

nottings · 2009-02-19 18:40:44 3
Turn shell tracing and verbosity (set -xv) on/off with 1 command!

Turn shell tracing and verbosity (set -xv) on/off in any Bourne-type shell If either -x or -v is set, the function turns them both off. If neither is on, both are turned on.
This is sample output - yours may be different.
4

xv() { case $- in *[xv]*) set +xv;; *) set -xv ;; esac }

cfajohnson · 2010-02-14 20:57:29 2
Set a posix shell to echo all commands that it's about to execute, after all expansions have been done.

the 'set -x' mode can be exited by typing set +x Show Sample Output
This is sample output - yours may be different.
```
$ set -x
$ pwd
+ pwd
/tmp
$ asdf='x*'
+ asdf='x*'
$ cd ~
+ cd /home/tiger
$ find $OLDPWD -name "$asdf"
+ find /tmp -name 'x*'
...
```
3

set -x

bartonski · 2010-01-30 16:08:54 10
Change Random Wallpaper on Gnome 3

Change Random Wallpaper on Gnome 3
This is sample output - yours may be different.
3

gsettings set org.gnome.desktop.background picture-uri file://"$(find ~/Wallpapers -type f | shuf -n1)"

Bonster · 2011-10-21 12:24:58 6
Prevent overwriting file when using redirection

If you set noclobber to on, bash won't allow redirection to overwrite existing files . set -o noclobber command turn the option on (default it s off ) . You can still append information but not overwrite the file .to turn it back off use : $ set +o noclobber . I use it because i overwrite a file by accident , after thought , content of the file was very important , creating a one more file mean nothing for my hard disk (we are not anymore on the 64 k memory time) , but content of file is far much important . What we call exeprience :( Show Sample Output
This is sample output - yours may be different.
```
gnu@robby:/tmp$ set -o noclobber
gnu@robby:/tmp$ cat  tesk
dffd
gnu@robby:/tmp$ cat > tesk
bash: tesk : impossible d'?craser le fichier existant
gnu@robby:/tmp$ cat  tesk
dffd
gnu@robby:/tmp$ cat >> tesk
fdf
gnu@robby:/tmp$ cat  tesk
dffd
fdf
gnu@robby:/tmp$ 
```
2

set -o noclobber

eastwind · 2010-01-08 21:06:44 6
vi a new file with execution mode

vix /tmp/script.sh Open a file directly with execution permission. Put the function in your .bashrc You can also put this in your vimrc: command XX w | set ar | silent exe "!chmod +x %" | redraw! and open a new file like this: vi +XX /tmp/script.sh
This is sample output - yours may be different.
2

vix(){ vim +'w | set ar | silent exe "!chmod +x %" | redraw!' $@; }

dooblem · 2010-05-27 21:12:48 7
Put terminal into vi mode

For if you want to use vi key bindings in the terminal
This is sample output - yours may be different.
2

set -o vi

bman · 2013-01-08 11:21:52 7
Use vi commands to edit your command lines

If you spend all day editing in vi then switching your fingers to Emacs mode just for the command line can be difficult. Use set -o vi in your bash shell and enjoy the power of a real editor.
This is sample output - yours may be different.
1

set -o vi; ls -l jnuk<ESC>bCjunk

jonty · 2009-02-05 22:58:51 13
ignore hidden directory in bash completion (e.g. .svn)
This is sample output - yours may be different.
1

Add to ~/.inputrc: set match-hidden-files off

mikebd · 2009-07-20 14:31:04 2
List bash functions defined in .bash_profile or .bashrc

If you issue the "set" command, you'll see a list of variables and functions. This command displays just those functions' names. Show Sample Output
This is sample output - yours may be different.
```
$ set | fgrep " ()"
.. () 
cd () 
h () 
ld () 
pg () 
today ()
```
1

set | fgrep " ()"

haivu · 2009-10-22 17:48:54 4
Configuring proxy client on terminal without leaving password on screen or in bash_history

Prompts the user for username and password, that are then exported to http_proxy for use by wget, yum etc Default user, webproxy and port are used. Using this script prevent the cleartext user and pass being in your bash_history and on-screen Show Sample Output
This is sample output - yours may be different.
```
[bob@localhost ~]$ set-proxy
username[fred]: bob
password:
[bob@localhost ~]$ wget google.co.uk
--13:05:20--  http://google.co.uk/
           => `index.html'
Resolving webproxy... 192.168.1.3
Connecting to webproxy|192.168.1.3|:1234... connected.
Proxy request sent, awaiting response... 200 OK
Length: unspecified [text/html]
13:05:20 (50.33 KB/s) - `index.html' saved [7381]
```
1

set-proxy () { P=webproxy:1234; DU="fred"; read -p "username[$DU]:" USER; printf "%b"; UN=${USER:-$DU}; read -s -p "password:" PASS; printf "%b" "\n"; export http_proxy="http://${UN}:${PASS}@$P/"; export ftp_proxy="http://${UN}:${PASS}@$P/"; }

shadycraig · 2010-02-04 13:12:59 4
Turn shell tracing and verbosity (set -xv) on/off with 1 command!

Running this command turns shell tracing and shell verbose debugging on or off. Not only does it do that, it also uses your terminals builtin method of setting colors to make debugging much easier. It looks at the current shell options contained in the $- special bash variable and that lets this function set the opposite of the current value. So from the shell you could do a: setx; echo "y" | ( cat -t ) | echo "d"; setx and it will turn on debbuggin. This is an amazingly useful function that is perfect to add system-wide by adding it to /etc/profile or /etc/bashrc.. You can run it from the shell, and you can also use it in your shell scripts like my .bash_profile - http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html Show Sample Output
This is sample output - yours may be different.
```
[2:0:646][srot@host:pts/1][/opt/SOURCE/screen-4.0.3]
$ echo "ulimit `ulimit -a|sed -e 's/.*$-[a-z]$) $.*$/ \1 \2/g'|tr -d \\012`"
echo "ulimit `ulimit -a|sed -e 's/.*$-[a-z]$) $.*$/ \1 \2/g'|tr -d \\012`"
ulimit -a|sed -e 's/.*$-[a-z]$) $.*$/ \1 \2/g'|tr -d \012
>>> sed -e 's/.*$-[a-z]$) $.*$/ \1 \2/g'
>>> ulimit -a
>>> tr -d 012
>>> echo 'ulimit  -c
 -d unlimited
 -e
 -f unlimited
 -i 55648
 -l 3
 -m 37
 -n
 -p 8
 -q 89
 -r
 -s 4
 -t unlimited
 -u
 -v unlimited
 -x unlimited'
ulimit  -c
 -d unlimited
 -e
 -f unlimited
 -i 55648
 -l 3
 -m 37
 -n
 -p 8
 -q 89
 -r
 -s 4
 -t unlimited
 -u
 -v unlimited
 -x unlimited
```
1

function setx(){ sed '/[xv]/!Q2' <<< $- && { set +xv; export PS4=">>> "; } || { export PS4="`tput setaf 3`>>> `tput sgr0`"; set -xv; }; }

AskApache · 2010-02-14 01:25:44 4
Countdown Clock

The biggest advantage over atoponce's nifty original is not killing the scrollback. Written assuming bash, but shouldn't be terribly difficult to port to other shells. S should be multiple spaces, but I can't get commandlinefu to save/show them properly, any help?
This is sample output - yours may be different.
1

function countdown { case "$1" in -s) shift;; *) set $(($1 * 60));; esac; local S=" "; for i in $(seq "$1" -1 1); do echo -ne "$S\r $i\r"; sleep 1; done; echo -e "$S\rBOOM!"; }

kniht · 2010-06-30 12:20:01 4
start a vnc server session to connect to a gdm login screen
This is sample output - yours may be different.
1

set $(ps -e o command= | grep "^/usr/bin/X "); while [ x"$1" != x"-auth" ]; do shift; done; sudo x11vnc -display :0 -auth "$2"

bandie91 · 2010-11-05 14:51:24 13
Mute speakers after an hour

Mutes the speakers after an hour, in case you fall asleep watching a video...
This is sample output - yours may be different.
1

sleep 3600; amixer set Master mute

kenbarbour · 2011-02-06 03:14:33 5
show hidden chars in vi
This is sample output - yours may be different.
1

set list / set nolist

EBAH · 2011-02-27 19:38:15 5
Change gnome-shell wallpaper
This is sample output - yours may be different.
1

gsettings set org.gnome.desktop.background picture-uri 'file://<path-to-image>'

scripteles · 2011-06-05 15:38:16 4
Change the homepage of Firefox

Pros: Works in all Windows computers, most updated and compatible command. Cons: 3 liner Replace fcisolutions.com with your site name.
This is sample output - yours may be different.
1

set str=user_pref("browser.startup.homepage", "http://www.fcisolutions.com/"); cd = "%APPDATA%\Mozilla\Firefox\Profiles\*.default\" echo %str%>>prefs.js

Micool777 · 2012-05-30 18:50:15 2
parted - scripted partitioning (of all multipathed SAN LUNs)

`multipath -ll` requires Device Mapper multipath.conf configuration. And of course, replace "3PARdata,VV" with your disk array's SCSI vendor,LUN name. - GPT partition table allows you to create >2TB partitions
This is sample output - yours may be different.
1

for i in $(multipath -ll | grep "3PARdata,VV"|awk '{print $1}') ; do parted -a optimal /dev/mapper/$i --script -- mklabel gpt mkpart primary 1 -1 set 1 lvm on ; done

mhs · 2012-09-12 15:30:36 5
Play a random .avi file from a media tree

unsets variables used by the one-liner sets up the IFS bash variable to not be affected by whitespace and disables extra glob expansion uses read to slurp the results of the find command into an array selects an element of the array at random to be passed as an argument to mplayer
This is sample output - yours may be different.
0

unset files i; set -f; O=$IFS; while IFS= read -r -d $'\0' files[i++]; do :; done < <(find . -name '*.avi' -print0) && IFS=$O; set +f && echo "Running: mplayer \"${files[ $(( $RANDOM % ${#files[@]} )) ]}\""

DEinspanjer · 2009-02-18 16:53:57 4
1 2 3 >

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Download Entire YouTube Channel - all of a user's videos

create the function then run 'yt-chanrip username' to download that user's entire channel. uses youtube-dl and the GData API. similar to http://www.commandlinefu.com/commands/view/3154/download-youtube-playlist

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

check open ports without netstat or lsof

Get all ip address for the host

List latest 5 modified files recursively

The output format is given by the -printf parameter: %T@ = modify time in seconds since Jan. 1, 1970, 00:00 GMT, with fractional part. Mandatory, hidden in the end. %TY-%Tm-%Td %TH:%TM:%.2TS = modify time as YYYY-MM-DD HH:MM:SS. Optional. %p = file path Refer to http://linux.die.net/man/1/find for more about -printf formatting. ------------------------ sort -nr = sort numerically and reverse (higher values - most recent timestamp - first) head -n 5 = get only 5 first lines (change 5 to whatever you want) cut -f2- -d" " = trim first field (timestamp, used only for sorting) ------------------------ Very useful for building scripts for detecting malicious files upload and malware injections.

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"

Sorted list of established destination connections

no need grep. its redundant when awk is present.

Map the slot of an I/O card to its PCI bus address

Recent hardware may or may not enumerate *both of* these values

resize all JPG images in folder and create new images (w/o overwriting)

Convert all jpegs in the current directory into ~1024*768 pixels and ~ 150 KBytes jpegs

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

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Commands using set (54)

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