All commands sorted by votes

All commands (14,187)

sorted by

Say no to overwriting if cp -i is the default alias.

If the problem is an aliased synonym for a command, you can still execute the original command by pre-pending it with a reverse-slash '\'. This works at least in Bash, but I guess the aliasing system refers definitely to Bash (and not only).
This is sample output - yours may be different.
0

\cp something toSomeWhereElse

xakon · 2010-09-25 03:07:04 9
Kill all Zombie processes if they accept it!

just a leaner, smaller version. Love the original idea!
This is sample output - yours may be different.
0

kill -9 `ps xawo state=,pid=|sed -n 's/Z //p'`

AskApache · 2010-10-27 07:38:07 3
# Multiline unique paragraph sort; with case insensitive option (-i)

Sorts blank line delimited paragraphs. '-i' -- case insensitivity option -- removes redundant paragraphs in a case insensitive way, and then sorts in a case insensitive way. If you search CommandLineFu with multiple anded terms searches, redundancy can ensue. This sorts the retrieved text (among other kinds of data), and removes the redundancy. Show Sample Output
This is sample output - yours may be different.
```
# Backup all MySQL Databases to individual files
for I in $(mysql -e 'show databases' -s --skip-column-names); do mysqldump $I | gzip > "$I.sql.gz"; done

# backup local MySQL database into a folder and removes older then 5 days backups
mysqldump -uUSERNAME -pPASSWORD database | gzip > /path/to/db/files/db-backup-`date +%Y-%m-%d`.sql.gz ;find /path/to/db/files/* -mtime +5 -exec rm {} \;

# geoip information
curl -s "http://www.geody.com/geoip.php?ip=$(curl -s icanhazip.com)" | sed '/^IP:/!d;s/<[^>][^>]*>//g'

# List files contained within a zip archive
unzip -l <filename>
```
0

gawk 'BEGIN {RS="\n\n"; if (ARGV[1]=="-i")IGNORECASE=1;ARGC=1}{if (IGNORECASE)Text[tolower($0)]=$0;else Text[$0]=$0 };END {N=asort(Text);for(i=1;i<=N;i++)printf "%s\n\n",Text[i]}' -i<Test.txt

IF_Rock · 2011-05-11 01:03:30 3
A list of IPs (only) that are online in a specific subnet.

Often you want to nmap a list of IPs using the -iL flag. This is an easy way to generate a list of IPs that are online in a specific subnet or IP range (192.168.1.100-110). Show Sample Output
This is sample output - yours may be different.
```
192.168.1.1
192.168.1.43
192.168.1.67
192.168.1.100
192.168.1.101
192.168.1.104
```
0

nmap -sP 192.168.1.0/24 | awk "/^Host/"'{ print $3 }' |nawk -F'[()]' '{print $2}'

cantormath · 2011-12-31 15:50:22 3
Append the line # -*- coding: utf-8 -*- to a file

Useful when specifying char encoding for Python and/or your editor
This is sample output - yours may be different.
0

sed -i -e '1i \# -*- coding: utf-8 -*-' yourfile.py

igniteflow · 2012-05-15 14:54:06 3
Get the IP address
This is sample output - yours may be different.
0

ip a s eth0 | awk '/inet / {print $2} | sed -e 's/\/..//g'

ilovespam · 2012-07-18 02:43:15 3
Play a random avi file in the current directory tree
This is sample output - yours may be different.
0

mplayer $(find . -iname '*.avi' | shuf -n1)

fooacad · 2012-11-13 09:00:12 4
Print first pages from all files from a directory

Very usefull script to use when uoy must print all files from a directory. Show Sample Output
This is sample output - yours may be different.
```
request id is hp-27 (129 file(s))
```
0

lp -dhp -P1-1 -o media=a4 *

alphabraga · 2013-07-26 00:09:56 6
strips ogg audio from webm video ( no reencoding )

Strips the audio track from a webm video. Use this in combination with clive or youtube-dl.
This is sample output - yours may be different.
0

for file in "$@"; do name=$(basename "$file" .webm) echo ffmpeg -i $file -vn -c:a copy $name.ogg ffmpeg -i "$file" -vn -c:a copy "$name.ogg" done

hoodie · 2013-10-05 14:49:07 9
Force Git to overwrite local files after fetch

git fetch --all git reset --hard origin/staging
This is sample output - yours may be different.
0

git reset --hard origin/master

nomikos · 2014-11-06 01:59:04 8
Recursively find files over a certain size and list in descending size order
This is sample output - yours may be different.
0

find . -size +10M -type f -print0 | xargs -0 ls -Sshl1

bradym · 2015-02-26 20:23:26 8
Rotate images and adjust timestamps by +1 hour

works for Powershot SD780 IS
This is sample output - yours may be different.
0

jhead -autorot -ta+1 *

yoyoyojomo · 2015-06-26 05:11:30 10
Get video information with ffmpeg

ffprobe doesn't throw an error and was actually made to do exactly that. Usually ffprobe is located in the same folder as ffmpeg. https://ffmpeg.org/ffprobe.html#Description
This is sample output - yours may be different.
0

ffprobe -i filename.flv

Yamy · 2016-10-15 20:26:34 17
hardcode dnsserver, no more rewriting of etc/resolv.conf

man NetworkManager.conf ... none: NetworkManager will not modify resolv.conf. This implies rc-manager unmanaged Show Sample Output
This is sample output - yours may be different.
```
[main]
dns=none
#plugins=ifcfg-rh,ibft
```
0

f="/etc/NetworkManager/NetworkManager.conf"; if ! grep ^dns $f > /dev/null; then sudo sed -i.bkp '/\[main\]/a dns=none' $f; fi

ksvnix · 2018-05-15 18:17:49 189
download and install the software package in one step
This is sample output - yours may be different.
0

rpm -ivh 'http://www.website.com/path/to/desired_software_package.rpm'

userevolution · 2009-08-17 05:08:58 7
See if your mac can run 64-bit && if it the kernel is loaded 64-bit
This is sample output - yours may be different.
0

ioreg -l -p IODeviceTree | grep -o EFI[0-9]. && system_profiler SPSoftwareDataType |grep 64

commandlinefu · 2009-09-03 19:58:44 3
Show which include directories your installation of Perl is using.

This will show where your Perl installation is looking for modules.
This is sample output - yours may be different.
0

perl -le 'print join $/, @INC'

chuckr · 2009-09-22 22:18:35 6
Do you really believe on Battery Remaining Time? Confirm it from time to time!

Fully recharge your computer battery and start this script. It will create or clean the file named battery.txt, print a start on it and every minute it will append a time stamp to it. Batteries last few hours, and each hour will have 60 lines of time stamping. Really good for assuring the system was tested in real life with no surprises. The last time stamp inside the battery.txt file is of interest. It is the time the computer went off, as the battery was dead! Turn on your computer after that, on AC power of course, and open battery.txt. Read the first and last time stamps and now you really know if you can trust your computer sensors. If you want a simple line of text inside the battery.txt file, use this: watch -n 60 'date > battery.txt' The time of death will be printed inside Show Sample Output
This is sample output - yours may be different.
```
I made a 10s interval to printout quicky this output. For pratical purposes and less file size, 60s interval sounds enought. Here's the contents of battery.txt:

start  
Dom Out 18 03:36:33 BRST 2009
Dom Out 18 03:36:43 BRST 2009
Dom Out 18 03:36:53 BRST 2009
Dom Out 18 03:37:03 BRST 2009
Dom Out 18 03:37:13 BRST 2009
Dom Out 18 03:37:23 BRST 2009
Dom Out 18 03:37:33 BRST 2009
Dom Out 18 03:37:43 BRST 2009
Dom Out 18 03:37:53 BRST 2009
Dom Out 18 03:38:03 BRST 2009
Dom Out 18 03:38:13 BRST 2009
Dom Out 18 03:38:23 BRST 2009
Dom Out 18 03:38:33 BRST 2009
Dom Out 18 03:38:44 BRST 2009
Dom Out 18 03:38:54 BRST 2009
Dom Out 18 03:39:04 BRST 2009

# the last time stamp inside the battery.txt file is of interest. It is the time the computer went off, as the battery was dead! 
```
0

echo start > battery.txt; watch -n 60 'date >> battery.txt'

m33600 · 2009-10-18 07:00:26 4
Set status in pidgin
This is sample output - yours may be different.
0

purple-remote "setstatus?status=Available&message=Checking libpurple"

spsneo · 2010-01-17 23:48:17 4
Get URLs matching some xmms2 search
This is sample output - yours may be different.
0

xmms2 info $(xmms2 mlib search '<query>' | sed -ne 's/^00*$[1-9][0-9]*$.*$/\1/p') | awk -F' = ' '$1~/ url$/{print$2}'

mwgamera · 2010-02-15 10:24:15 3
Kill process by searching something from 'ps' command

Using -f treats the process name as a pattern so you don't have to include the full path in the command. Thus 'pkill -f firefox' works, even with iceweasel.
This is sample output - yours may be different.
0

pkill -f <process name>

eikenberry · 2010-06-19 02:36:31 3
Change directory by inode

First use ls -i to list files and directories with their inode number Then if you want to change to one of the directories, replace inode_no with its inode then execute the command Show Sample Output
This is sample output - yours may be different.
```
 
```
0

cd $(find -inum inode_no)

emacs · 2010-09-25 06:04:32 6
Append a new line "FOOBAR" in all files matching the glob*
This is sample output - yours may be different.
0

sed -i '$a\FOOBAR' *

sputnick · 2011-11-19 03:45:36 3
pdfcount: get number of pages in a PDF file
This is sample output - yours may be different.
0

pdftk file.pdf dump_data output | grep -i Num

evandrix · 2012-03-27 22:48:40 4
Get the IP address
This is sample output - yours may be different.
0

ip a s eth0 | awk -F"[/ ]+" '/inet / {print $3}'

ilovespam · 2012-07-18 02:47:12 3
‹ First < 457 458 459 460 461 > Last ›

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Analyze, check, auto-repair and optimize Mysql Database

A useful way to do a full check and auto repair damaged databases

Get info on RAM Slots and Max RAM.

Find usb device in realtime

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

throttle bandwidth with cstream

this bzips a folder and transfers it over the network to "host" at 777k bit/s. cstream can do a lot more, have a look http://www.cons.org/cracauer/cstream.html#usage for example: $ echo w00t, i'm 733+ | cstream -b1 -t2 hehe :)

Time Synchronisation with NTP

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"

LVM2 Reduce

Just the commands for the lvreduce I keep forgetting.

Word-based diff on reformatted text files

It can be hard to spot differences in reformatted files, because of all the diff noise created by word wrapped lines. This command removes all the noise and performs a word-by-word diff. To ignore empty lines, add -B to the diff command. Also, if this is something you do often, you might want to check out the wdiff(1) program.

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"

Commit command to history file immedeately after execution

This could be added to .bashrc. Background: Linux usually saves history only on clean exit of shell. If shell ends unclean, history is lost. Also numerous terminals might confuse their history. With this variable set, history is immedeately written, accessible to all other open shells.

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for:

» all commands
» commands with 3 up-votes (commandlinefu3)
» commands with 10 up-votes (commandlinefu10)

All commands (14,187) the last day the last week the last month all time sorted by date votes

What's this?

Check These Out

Stay in the loop…

All commands (14,187)

sorted by