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Replace VIM
This is sample output - yours may be different.
0

:%s/<string old>/<string new>/g

Plancton · 2015-11-10 17:05:11 10
Remove blank lines from a file using grep and save output to new file
This is sample output - yours may be different.
0

awk NF

aktau · 2017-05-24 12:08:27 17
Grep the process excluding the grep itself.
This is sample output - yours may be different.
0

ps -ef | grep [t]clsh

tensaix2j · 2009-02-25 11:21:49 8
prints line numbers

No need $_ netp ;)
This is sample output - yours may be different.
0

perl -pe 'print "$. "' <file>

sputnick · 2009-12-08 16:11:51 10
print line and execute it in BASH

since we're repeating the command there after the semicolon, we only need one backtick Show Sample Output
This is sample output - yours may be different.
```
$ echo "ls"; `!#:0-$

echo "ls"; `echo "ls" ; `
ls
Android.mk  ardrv  devmgr  egl  file1
```
0

$ echo "command"; `!#:0-$

unixmonkey20949 · 2011-04-28 17:09:25 3
Mark a directory as one where something failed

If you use colored ls(1), the broken symbolic links significantly differ from regular files and directories in the ls listing. In my case it is bright red. 0 is for getting the first place in the list.
This is sample output - yours may be different.
0

fail () { ln -s /nonexistent 0_FAIL_${1}; }

pipeliner · 2011-11-06 20:14:33 3
list with full path
This is sample output - yours may be different.
0

find `pwd` -maxdepth 1 -exec ls --color -d {} \;

kev · 2011-12-16 06:18:35 5
find all c and cpp files except the ones in the unit-test and android subdirectories

works only in zsh, requires EXTENDED_GLOB to be set.
This is sample output - yours may be different.
0

ls **/*.c(|pp)~(unit-test|android)/*

bst · 2012-04-27 07:43:22 8
Mute Master sound channel, printing only the percent volume
This is sample output - yours may be different.
0

amixer -c 0 set Master toggle | sed -n "$ p" | awk '{print $4}' | sed "s/[^0-9]//g"

dtsip · 2012-06-26 21:16:42 7
list all files are greater than 10mb

list all files are greater than 10mb lent from: http://www.tippscout.de/linux-grosze-dateien-finden_tipp_1653.html
This is sample output - yours may be different.
0

ls -lahS $(find / -type f -size +10000k)

Ichag · 2013-04-22 12:08:16 5
watch video youtube without flash but with mplayer and youtube-dl
This is sample output - yours may be different.
0

mplayer $(youtube-dl -g http://youtube.com/example)

aiki46 · 2013-12-06 15:39:23 9
Use grep to get multiple patterns.

Using egrep to search multiple patterns. Show Sample Output
This is sample output - yours may be different.
```
ERROR: This is an error message.
CRITICAL: This is a critical message.
WARNING: This is a warning message.
```
0

egrep -wi --color 'warning|error|critical'

krizzo · 2014-10-07 17:06:39 8
dd with pretty progress bar (Requires pv and dialog)
This is sample output - yours may be different.
0

(pv -n centos-7.0-1406-x86_64-DVD.img | dd of=/dev/disk4 bs=1m conv=notrunc,noerror) 2>&1 | dialog --gauge "Copying CentOS to USB Stick in /dev/disk4" 10 70 0

BoxingOctopus · 2015-01-19 19:36:15 12
Info cpu

4.1.6-1-ARCH Info cpu
This is sample output - yours may be different.
0

cat /proc/cpuinfo | less

olto · 2015-10-01 04:34:03 10
Clear DNS cache on a mac

This will clear Mac OS's DNS cache, which has been a source of issues for me in the past.
This is sample output - yours may be different.
0

sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder

abeardevil · 2017-02-24 18:34:49 17
split email by @ with awk

splitting email by @ with awk Show Sample Output
This is sample output - yours may be different.
```
xxx.com
```
0

echo $mail | awk -F'@' '{print $2}'

aysadk · 2017-05-24 22:36:28 17
set open firmware password command mode

Sets the Open Firmware to ask for password when selecting a boot volume other then the hd
This is sample output - yours may be different.
0

/usr/local/bin/OFPW -mode 1

tomslick · 2009-02-18 14:48:31 5
Add all not commited files to svn
This is sample output - yours may be different.
0

svn st | grep ^? | xargs svn add 2> /dev/null

douglas · 2009-02-25 11:40:51 6
When feeling boring this command help too

sudo apt-get install bb A demoscene intro in ascii art with tracker song
This is sample output - yours may be different.
0

bb

eastwind · 2009-04-22 05:33:25 7
Poor man's unsort (randomize lines)

If you need to randomize the lines in a file, but have an old sort commands that doesn't support the -R option, this could be helpful. It's easy enough to remember so that you can create it as a script and use that. It ain't real fast. It ain't safe. It ain't super random. Do not use it on untrusted data. It requires bash for the $RANDOM variable to work. Show Sample Output
This is sample output - yours may be different.
```
$ echo -e a\\nb\\nc | while read l; do echo $RANDOM "$l"; done | sort -n | cut -d " " -f 2-
c
a
b
```
0

while read l; do echo $RANDOM "$l"; done | sort -n | cut -d " " -f 2-

ketil · 2010-02-03 22:36:34 4
simple regex spell checker

searches through the linux dictionary for the word you're trying to spell (you can use regular expressions, e.g. "< /usr/share/dict/words egrep bro[c]+o[l]+i" ) Show Sample Output
This is sample output - yours may be different.
```
onomatopoeia
onomatopoeial
onomatopoeian
```
0

< /usr/share/dict/words egrep onomatopoeia

smop · 2010-08-13 00:12:39 4
Zip a directory recursively, excluding some contained directories

This zips a directory recursively but excludes some directories within the zipped directory. Useful for excluding .svn and .git directories, or compilation targets.
This is sample output - yours may be different.
0

zip -r new.zip dir_to_zip -x '*/dir_to_exclude1/*' -x '*/dir_to_exclude2/*'

rocketraman · 2010-11-18 09:38:50 6

Pascal's triangle

see: http://en.wikipedia.org/wiki/Pascal%27s_triangle Show Sample Output

l=10;for((i=0;i<$l;i++));do eval "a$i=($(pv=1;v=1;for((j=0;j<$l;j++));do [ $i -eq 0 -o $j -eq 0 ]&&{ v=1 && pv=1; }||v=$((pv+a$((i-1))[$((j))]));echo -n "$v ";pv=$v;done;));";eval "echo \"\${a$i[@]}\"";done | column -t;

glaudiston · 2011-02-11 17:00:20 16

Download 40 top funnyjunk Images to the current directory

If your version of curl does not support the --compressed option, use curl -s http://funnyjunk.com | gunzip instead of curl -s --compressed http://funnyjunk.com
This is sample output - yours may be different.
0

curl -s --compressed http://funnyjunk.com | awk -F'"' '/ '"'"'mainpagetop24h'"'"'/ { print "http://funnyjunk.com"$4 }' | xargs curl -s | grep -o 'ht.*m/pictures/.*\.jpg\|ht.*m/gifs/.*\.gif' | grep "_......_" | uniq | xargs wget

laniner · 2011-07-21 15:57:21 6
Format images for Kindle

optipng *.png http://www.mobileread.com/forums/showpost.php?p=147076&postcount=7 -dither FloydSteinberg produces a more uniform dither than the default.
This is sample output - yours may be different.
0

mogrify -colorspace Gray -rotate '-90>' -resize 600x800 -dither FloydSteinberg -colors 16 -format png *

yoyoyojomo · 2012-02-01 17:16:52 3
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What's this?

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bash function to check for something every 5 seconds

checkfor: have the shell check anything you're waiting for. 'while : ; do' is an infinite loop '$*' executes the command passed in 'sleep 5' - change for your tastes, sleep for 5 seconds bash, ksh, likely sh, maybe zsh Ctrl-c to break the loop

concatenate avi files

concatenates avi files

Random numbers with Ruby

There's been a few times I've needed to create random numbers. Although I've done so in PERL, I've found Ruby is actually faster. This script generates 20 random "10" digit number NOT A RANDOM NUMBER. Replace 20 (1..20) with the amount of random numbers you need generated

Add calendar to desktop wallpaper

Add calendar to desktop wallpaper , mess with the coordinates to place where you like

Start a command on only one CPU core

This is useful if you have a program which doesn't work well with multicore CPUs. With taskset you can set its CPU affinity to run on only one core.

a function to find the fastest DNS server

http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.

Search commandlinefu.com from the command line using the API

Search for one/many words on commandlinefu, results in vim for easy copy, manipulation. The -R flag is for readonly mode...you can still write to a file, but vim won't prompt for save on quit. What I'd really like is a way to do this from within vim in a new tab. Something like $ :Tex path/to/file but $ :cmdfu search terms

Play ISO/DVD-files and activate dvd-menu and mouse menu clicks.

compare two Microsoft Word documents

http://meld.sourceforge.net/ http://www.winfield.demon.nl/

Find usb device in realtime

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

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