All commands sorted by votes

All commands (14,187)

sorted by

-1

update-alternatives --config x-terminal-emulator

l1feh4ck3r · 2009-02-13 13:45:43 8

Show Network IP and Subnet

same thing as the other
This is sample output - yours may be different.
-1

ipcalc $(ifconfig eth0 | grep "inet addr:" | cut -d':' -f2,4 | sed 's/.+Bcast:/\//g') | awk '/Network/ { print $2 } '

solarislackware · 2009-12-05 15:00:32 3
print shared library dependencies
This is sample output - yours may be different.
-1

ldd path_to_executable

yababay · 2010-09-06 17:07:39 3
Lookaround in grep

tutorial @ http://www.regular-expressions.info/lookaround.html also see @ http://stackoverflow.com/questions/5080988/how-to-extract-string-following-a-pattern-with-grep-regex-or-perl for tip: `grep -Po 'name="\K.*?(?=")' file.txt` Show Sample Output
This is sample output - yours may be different.
```
$ John
```
-1

echo "John's" | grep -Po '\b\w+(?<!s)\b'

evandrix · 2011-07-15 12:08:18 6
print shared library dependencies

use this to avoid executing the target app
This is sample output - yours may be different.
-1

function ldd(){ objdump -p $1 | grep -i need; }

jyf · 2010-09-07 02:44:59 3
Print the local ip on a wireless connection

On wired connections set 'eth0' instead of 'wlan0'
This is sample output - yours may be different.
-1

sudo ifconfig wlan0 | grep inet | awk 'NR==1 {print $2}' | cut -c 6-

mouths · 2013-02-18 14:10:07 8
Save the network interface info into a text file, so that you can re-apply it later

On Windows 2000 or newer, you can use the command line to save the current network interface info. You can then edit the text file and re-apply it using the netsh -f command (or netsh exec). Keep a bunch of text files around to quickly switch connection info without using extra software. http://en.wikipedia.org/wiki/Netsh http://support.microsoft.com/kb/242468 http://thelazyadmin.com/blogs/thelazyadmin/archive/2005/04/04/Using-Netsh-to-Manage-Network-Interfaces-Part-2.aspx Show Sample Output
This is sample output - yours may be different.
```
# ----------------------------------
# Interface IP Configuration
# ----------------------------------
pushd interface ip
# Interface IP Configuration for "builtin"
set address name="builtin" source=dhcp
set dns name="builtin" source=static addr=192.168.0.12 register=PRIMARY
add dns name="builtin" addr=192.168.0.1 index=2
set wins name="builtin" source=dhcp
popd
# End of interface IP configuration
```
-1

netsh interface ip dump > current-interfaces.txt

piyo · 2009-02-13 15:13:05 8
Return Dropbox folder location.

Newer versions of Dropbox let you choose the location for your Dropbox folder. If you use script to put things into your Dropbox folder (todo list, screenshots, torrents etc.) but have the Dropbox folder in different locations on your other computers this lets you use the same script on all systems without having to tell it where the Dropbox folder is. Show Sample Output
This is sample output - yours may be different.
```
/home/user/Dropbox
/media/backup/Dropbox
/really/deep/level/subdirectory/for/some/reason/Dropbox
```
-1

sqlite3 $HOME/.dropbox/config.db "select value from config where key like '%dropbox_path%'"

mobilediesel · 2011-06-05 08:26:02 13
Broadcast your shell thru ports 5000, 5001, 5002 ...

solution that works for me
This is sample output - yours may be different.
-1

script -qf | tee >(nc -l -p 5000)

nesses · 2013-04-13 00:22:02 5
Clearcase find branch
This is sample output - yours may be different.
-1

ct find -avobs -nxname -element 'brtype(branch_name)' -print 2>/dev/null

naseer · 2009-02-05 17:02:29 23
batch convert OGG to WAV
This is sample output - yours may be different.
-1

for f in *.ogg ; do mplayer -quiet -vo null -vc dummy -ao pcm:waveheader:file="$f.wav" "$f" ; done

ideasman42 · 2009-02-23 10:09:10 8
one line command to recursively add all jar files in current folder to java class path

a pretty simple script when running java programs from command line Show Sample Output
This is sample output - yours may be different.
```
.:/home/hyhu/Ubuntu One/javalibs/a.jar:/home/hyhu/Ubuntu One/javalibs/b.jar:/home/hyhu/Ubuntu One/javalibs/c.jar:/home/hyhu/Ubuntu 
```
-1

CLASSPATH=.; export CLASSPATH=$CLASSPATH$(find "$PWD" -name '*.jar' -type f -printf ':%p\n' | sort -u | tr -d '\n'); echo $CLASSPATH

dexterhu · 2011-03-11 19:21:15 3
Create web site ssl certificates
This is sample output - yours may be different.
-1

openssl req -new -x509 -extensions v3_ca -days 1100 -subj "/C=CA/ST=CA/L=SomeCity/O=EXAMPLE Inc./OU=Web Services/CN=example.com/emailAddress=postmaster@example.com" -nodes -keyout web.key -out web.crt

plasticdoc · 2011-06-05 08:57:21 3
Countdown Clock

I find the other timers are inaccurate. It takes some microseconds to perform the date function. Therefore, using date/time math to calculate the time for us results in millisecond accuracy. This is tailored to the BusyBox date function. May need to change things around for GNU date function. Show Sample Output
This is sample output - yours may be different.
```
00:03:00
```
-1

let T=$(date +%s)+3*60;while [ $(date +%s) -le $T ]; do let i=$T-$(date +%s); echo -ne "\r$(date -d"0:0:$i" +%H:%M:%S)"; sleep 0.3; done

davidk · 2019-10-22 15:04:21 143
Copy files from one dir to another using tar.

Add z to the flags to enable compression.
This is sample output - yours may be different.
-1

tar cf - . | (cd /new/dir; tar xvf -)

jauderho · 2009-03-09 20:30:34 12
Print just line 4 from a textfile

using tail first won't do it because tail counts from the bottom of the file. You could do it this way but I don't suggest it
This is sample output - yours may be different.
-1

head -n X | tail -n 1

infinull · 2010-07-08 22:06:39 5
recursively add all sub folders with executable file of current folder to PATH environment variable

(1) don't run twice, or the same folder will occur in $PATH. (2) otherwise you need to start a new terminal Show Sample Output
This is sample output - yours may be different.
```
blah blah blah ..... (too long)
```
-1

export PATH=$PATH$(find "$PWD" -name '.*' -prune -o -type f -a -perm /u+x -printf ':%h\n' | sort -u | tr -d '\n'); echo $PATH

dexterhu · 2011-03-11 19:31:17 7
Purge application's residual config & orphans
This is sample output - yours may be different.
-1

dpkg -l | sed '/^rc/!d;s/^[^ ]* [^ ]* $[^ ]*$.*/\1/' | xargs -r sudo apt-get -y purge

plasticdoc · 2011-06-05 09:19:27 3
Prints line numbers

Works in RHEL5 and derivatives.
This is sample output - yours may be different.
-1

nl <filename>

SuperFly · 2010-01-06 16:14:43 3
Find default gateway
This is sample output - yours may be different.
-1

route -n | grep "^0\." | awk '{print "Gateway to the World: "$2", via "$NF""}'

bandie91 · 2010-08-09 11:55:37 26
SSH with sql like commad

I will ssh to ip address 192.168.2.1 with user name user. "connect user 192.168.1.1" is same as "ssh user@192.168.1.1"
This is sample output - yours may be different.
-1

add "ssh $1@$2" in /usr/sbin/connect with executable permission, now use commad "connect user 192.168.1.1"

sandeepvreddy · 2012-01-27 12:50:20 3
Realtime lines per second in a log file

logtop show number of lines per second, also classify them so you can show a "top" of every aspect of your logfile : tail -f access.log | awk '{print $1; fflush();}' | logtop
This is sample output - yours may be different.
-1

tail -f logfile | logtop

Sizeof · 2012-06-24 19:18:30 3
View open file descriptors for a process.
This is sample output - yours may be different.
-1

lsof -p <process_id> | wc -l

virtualshock · 2009-07-20 17:46:54 4
a simple alarm

this command will beep like an alarm for one minute from 18:57. you can change "1857" to your desired time. you should have alsa-oss package installed, and you should also be root or part of "audio" group.
This is sample output - yours may be different.
-1

while true; do while [ `date +%H%M` == "1857" ] ; do sleep 1s; yes | head -n 2000 > /dev/dsp; done; done;

mrwill · 2011-04-23 14:44:26 8
Display CPU usage in percentage
This is sample output - yours may be different.
-1

ps aux | awk {'sum+=$3;print sum'} | tail -n 1

tailot · 2011-07-16 16:16:59 3
‹ First < 483 484 485 486 487 > 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

copy from host1 to host2, through your host

Good if only you have access to host1 and host2, but they have no access to your host (so ncat won't work) and they have no direct access to each other.

Compare copies of a file with md5

I had the problem that the Md5 Sum of a file changed after copying it to my external disk. This unhandy command helped me to fix the problem.

Commandline document conversion with Libreoffice

In this example, the docx gets converted to Open Document .odt format. For other formats, you'll need to specify the correct filter (Hint: see "Comments" link below for a nice list).

route output as next command's parameters

Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

Generate pretty secure random passwords

These are my favourite switches on pwgen: -B Don't include ambiguous characters in the password -n Include at least one number in the password -y Include at least one special symbol in the password -c Include at least one capital letter in the password It just works! Add a number to set password length, add another to set how many password to output. Example: pwgen -Bnyc 12 20 this will output 20 password of 12 chars length.

Determine what version of bind is running on a dns server.

Due to the recent dynamic update vulnerability with bind, I was forced to dig a little deeper into dig...

Generate random IP addresses

It never ends

Function to split a string into an array

It works as a method applicated to a variable, converts the string variable into an array

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"

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