All commands

All commands (14,187)

sorted by

Detect Language of a string

Usage: detectlanguage <phrase> Example: detectlanguage hola
This is sample output - yours may be different.
5

detectlanguage(){ curl -s "http://ajax.googleapis.com/ajax/services/language/detect?v=1.0&q=$@" | sed 's/{"responseData": {"language":"$[^"]*$".*/\1\n/'; }

matthewbauer · 2010-03-08 03:24:56 7
Google Translate

Usage: translate <phrase> <source-language> <output-language> Example: translate hello en es See this for a list of language codes: http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes Show Sample Output
This is sample output - yours may be different.
```
hola
```
65

translate(){ wget -qO- "http://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=$1&langpair=$2|${3:-en}" | sed 's/.*"translatedText":"$[^"]*$".*}/\1\n/'; }

matthewbauer · 2010-03-08 03:15:48 85
Your name backwards
This is sample output - yours may be different.
2

espeak "$USER" --stdout | sox - -t mp3 - reverse | mpg123 -

matthewbauer · 2010-03-08 02:53:24 4
Fetch the Gateway Ip Address

Better use iproute2 !
This is sample output - yours may be different.
2

ip route list match 0.0.0.0/0 | cut -d " " -f 3

BaS · 2010-03-07 15:41:18 3
Backup all mysql databases to individual files on a remote server

It grabs all the database names granted for the $MYSQLUSER and gzip them to a remote host via SSH.
This is sample output - yours may be different.
7

for I in $(mysql -e 'show databases' -u root --password=root -s --skip-column-names); do mysqldump -u root --password=root $I | gzip -c | ssh user@server.com "cat > /remote/$I.sql.gz"; done

juliend2 · 2010-03-07 15:03:12 7
Let's make screen and ssh-agent friends

When you start screen as `ssh-agent screen`, agent will die after detatch. If you don't want to take care about files when stored agent's pid/socket/etc, you have to use this command.
This is sample output - yours may be different.
4

eval `ssh-agent`; screen

mechmind · 2010-03-07 14:58:54 3
Fetch the Gateway Ip Address

same thing without loop ;)
This is sample output - yours may be different.
0

/sbin/route -n | grep "^0\.0\.0\.0" | awk '{ print $2 }'

BorneBjoern · 2010-03-07 13:59:57 5
Tell Analytics to fuck itself.

See http://code.google.com/apis/analytics/docs/concepts/gaConceptsCookies.html if you are unclear about the Google Analytics cookie system. If Firefox is your daily browser, be a good Orwellian and run this command regularly. If you see, 'SQL error near line 1: database is locked', close Firefox and run again.
This is sample output - yours may be different.
5

gofuckanalytics() { echo "DELETE FROM moz_cookies WHERE name LIKE '__utm%';" | sqlite3 $( find ~/.mozilla -name cookies.sqlite ) }

meathive · 2010-03-07 09:16:14 8
determine if a shared library is compiled as 32bit or 64bit

file displays a files type the -L flag means follow sym-links (as libraries are often sym-linked to another this behavior is likely preferred) more complex behavior (*two* grep commands!) could be used to determine if the file is or is not a shared library.
This is sample output - yours may be different.
-3

file -L <library> | grep -q '64-bit' && echo 'library is 64 bit' || echo 'library is 32 bit'

infinull · 2010-03-07 06:31:35 3
determine if a shared library is compiled as 32bit or 64bit

Determines the flavor of a shared library by looking at the addresses of its exposed functions and seeing if they are 16 bytes or 8 bytes long. The command is written so the library you are querying is passed to a variable up font -- it would be simple to convert this to a bash function or script using this format. Show Sample Output
This is sample output - yours may be different.
```
/lib32/libgcc_s.so.1 is a 32 bit library
```
2

libquery=/lib32/libgcc_s.so.1; if [ `nm -D $libquery | sed -n '/[0-9A-Fa-f]\{8,\}/ {p; q;}' | grep "[0-9A-Fa-f]\{16\}" | wc -l` == 1 ]; then echo "$libquery is a 64 bit library"; else echo "$libquery is a 32 bit library"; fi;

birnam · 2010-03-07 04:24:08 3
Fetch the Gateway Ip Address

This is to fetch the Gateway Ip Address of a machine. Use the below format to put the value in a variable if you wish to find the gateway ip in a script GATEWAY=$(netstat -nr | awk 'BEGIN {while ($3!="0.0.0.0") getline; print $2}')
This is sample output - yours may be different.
1

netstat -nr | awk 'BEGIN {while ($3!="0.0.0.0") getline; print $2}'

freethinker · 2010-03-07 01:47:55 6
sort selected lines in a text file to the beginning or end of the file.

This function is used to sort selected lines of a text file to the end of that file. Especially useful in cases where human intervention is necessary to sort out parts of a file. Let's say that you have a text file which contains the words rough slimy red fluff dough For whatever reason, you want to sort all words rhyming with 'tough' to the bottom of the file, and all words denoting colors to the top, while keeping the order of the rest of the file intact. '$EDITOR' will open, showing all of the lines in the given file, numbered with '0' padding. Adding a '~' to the beginning of the line will cause the line to sort to the end of the file, adding '!' will cause it to sort to the beginning. Show Sample Output
This is sample output - yours may be different.
```
$ 2end /tmp/2end.txt
~000001 rough
000002  slimy
!000003 red
~000004 fluff
000005  dough
$ cat /tmp/2end.txt 
red
slimy
dough
rough
fluff
```
0

2end () ( export LC_ALL=C; nl -n rz $1 > $1.tmp; ${EDITOR:-vi} $1.tmp; sort $1.tmp | sed -r 's/^.*[0-9]+\t+//' > $1; rm $1.tmp; )

bartonski · 2010-03-06 23:02:28 6
print all network interfaces' names and IPv4 addresses

ifconfig can't properly display interface's name longer 9 symbols,also it can't show IPs added thru ip command, so 'ip' should be used instead. This alias properly shows long names, bond interfaces and all interface aliases. loopback interface is ignored, since its IP is obvious Show Sample Output
This is sample output - yours may be different.
```
base0             10.0.2.15/24 
base0:1           192.168.0.1/27 
base0:managment   10.23.98.15/24 
vlan666           10.1.57.18/30 
vlan666:service   192.168.100.1/24 
```
5

alias ips='ip a | awk '\''/inet /&&!/ lo/{print $NF,$2}'\'' | column -t'

zolden · 2010-03-06 20:33:04 3
conver mp3 to m4b
This is sample output - yours may be different.
0

mpg123 -s input.mp3 | faac -P -X -w -o output.m4b -

schmiddim · 2010-03-06 11:28:19 3

convert flac to mp3

if you haven't already done so, install lame and flac: sudo apt-get install lame flac Show Sample Output

flac -cd input.flac |lame -h - output.mp3

nickleus · 2010-03-05 23:54:21 4

List .log files open by a pid

Uses lsof to display the full path of ".log" files opened by a specified PID.
This is sample output - yours may be different.
6

lsof -p 1234 | grep -E "\.log$" | awk '{print $NF}'

zlemini · 2010-03-05 11:41:28 5
Super Paste

manda la salida de un comando hacia un servicio de paste y coloca la url de ese paste en el portapapeles
This is sample output - yours may be different.
-4

(echo "" | xsel -o) ; (programa | wgetpaste -s dpaste | awk '{print $7}' | xsel -ai)

dvinchi666 · 2010-03-05 09:31:30 6
Read directory contents recursively
This is sample output - yours may be different.
-5

ls -R .

stuntkiwi · 2010-03-05 03:13:20 5
Calculate the the last day of a month +/- from current month

This produces a parseable output of the last day of the month in future or past. Change the '-v-0m' to be a month plus or minus from the current system time. Show Sample Output
This is sample output - yours may be different.
```
:~ date  -j -v1d -v-0m -v-1d +'%m %d %Y'
02 28 2010
:~ 
```
-4

date -j -v1d -v-0m -v-1d +'%m %d %Y'

drewk · 2010-03-04 17:47:51 6
simple echo of IPv4 IP addresses assigned to a machine

ifconfig is dead, long-live iproute2 this also uses only awk to do the grepping and removal of CIDR notation Show Sample Output
This is sample output - yours may be different.
```
127.0.0.1
10.3.0.43
```
0

ip addr | awk '/inet / {sub(/\/.*/, "", $2); print $2}'

markdrago · 2010-03-04 14:21:18 6
simple echo of IPv4 IP addresses assigned to a machine

Require the moreutils package Show Sample Output
This is sample output - yours may be different.
```
192.168.1.1
```
-4

ifdata -pa eth0

richard · 2010-03-04 10:29:24 4
Sort a character string

using perl
This is sample output - yours may be different.
1

echo sortmeplease | perl -pe 'chomp; $_ = join "", sort split //'

sharfah · 2010-03-04 08:31:19 3
simple echo of IPv4 IP addresses assigned to a machine

Easy way to grab the IP address of a machine for easy script use. If needed a "| grep -v 127.0.0.1" at the end will suppress localhost. Show Sample Output
This is sample output - yours may be different.
```
192.168.15.250
127.0.0.1
```
-2

ifconfig | awk '/inet addr/ {print $2 }' | sed 's/.*://g'

Guyverix · 2010-03-04 08:15:08 5
Top ten (or whatever) memory utilizing processes (with children aggregate) - Can be done without the multi-dimensional array
This is sample output - yours may be different.
1

ps axo rss,comm,pid | awk '{ proc_list[$2] += $1; } END { for (proc in proc_list) { printf("%d\t%s\n", proc_list[proc],proc); }}' | sort -n | tail -n 10

bwm71 · 2010-03-03 16:51:48 3
Top ten (or whatever) memory utilizing processes (with children aggregate)

This command loops over all of the processes in a system and creates an associative array in awk with the process name as the key and the sum of the RSS as the value. The associative array has the effect of summing a parent process and all of it's children. It then prints the top ten processes sorted by size. Show Sample Output
This is sample output - yours may be different.
```
2472    NetworkManager
3624    getty
3888    hald
3948    nm-system-setti
3968    gdm
4012    bash
6384    sshd
14348   apache2
20560   console-kit-dae
22104   mysqld
```
5

ps axo rss,comm,pid | awk '{ proc_list[$2]++; proc_list[$2 "," 1] += $1; } END { for (proc in proc_list) { printf("%d\t%s\n", proc_list[proc "," 1],proc); }}' | sort -n | tail -n 10

d34dh0r53 · 2010-03-03 16:41:05 5
‹ First < 393 394 395 396 397 > 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

Testing php configuration

Securely destroy data (including whole hard disks)

GNU shred is provided by the coreutils package on most Linux distribution (meaning, you probably have it installed already), and is capable of wiping a device to DoD standards. You can give shred any file to destroy, be it your shell history or a block device file (/dev/hdX, for IDE hard drive X, for example). Shred will overwrite the target 25 times by default, but 3 is enough to prevent most recovery, and 7 passes is enough for the US Department of Defense. Use the -n flag to specify the number of passes, and man shred for even more secure erasing fun. Note that shredding your shell history may not be terribly effective on devices with journaling filesystems, RAID copies or snapshot copies, but if you're wiping a single disk, none of that is a concern. Also, it takes quite a while :)

dd with progress bar and statistics to gzipped image

This is a useful command to backup an sd card with relative total size for piping to pv with a progressbar

Nginx - print all optional modules before compilation

wget http://nginx.org/download/nginx-1.15.3.tar.gz && tar -xzf 1.15.3.tar.gz && cd nginx-1.15.3

Unix alias for date command that lets you create timestamps in ISO 8601 format

I often need to add a timestamp to a file, but I never seem to remember the exact format string that has to be passed to the date command to get a compact datetime string like 20090220T231410 (i.e yyyymmddThhmmss, the ISO 8601 format popular outside the US)

Monitor Linux/MD RAID Rebuild

set a reminder for 5 days in the future

setup for reminder in 5 days, added the date in the future. To run a job at 4pm three days from now, you would do at 4pm + 3 days, to run a job at 10:00am on July 31, you would do at 10am Jul 31 and to run a job at 1am tomorrow, you would do at 1am tomorrow.

Create a mirror of a local folder, on a remote server

Create a exact mirror of the local folder "/root/files", on remote server 'remote_server' using SSH command (listening on port 22) (all files & folders on destination server/folder will be deleted)

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

ThePirateBay.org torrent search

usage: tpb searchterm example: tpb the matrix trilogy This searches for torrents from thepiratebay and displays the top results in reverse order, so the 1st result is at the bottom instead of the top -- which is better for command line users

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