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commandlinefu.com is the place to record those command-line gems that you return to again and again.

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May 19, 2015 - A Look At The New Commandlinefu
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All commands from sorted by
Terminal - All commands - 12,372 results
ifconfig eth0 | grep 'HWaddr' | awk '{print $5}'
ip -f inet addr show eth0
netstat -an | grep -i listen
2009-02-19 19:27:49
User: scubacuda
Functions: grep netstat
-2

From 'man netstat'

"netstat -i | -I interface [-abdnt] [-f address_family] [-M core] [-N system]

Show the state of all network interfaces or a single interface

which have been auto-configured (interfaces statically configured

into a system, but not located at boot time are not shown). An

asterisk (``*'') after an interface name indicates that the

interface is ``down''. If -a is also present, multicast

addresses currently in use are shown for each Ethernet interface

and for each IP interface address. Multicast addresses are shown

on separate lines following the interface address with which they

are associated. If -b is also present, show the number of bytes

in and out. If -d is also present, show the number of dropped

packets. If -t is also present, show the contents of watchdog

timers."

rsync -avvvz -e "ssh -i /root/.ec2/id_rsa-gsg-keypair" --archive --progress /root/.ec2/id_rsa-gsg-keypair [email protected]:/root
2010-01-22 17:21:58
User: lalit241
Functions: rsync
-2

Connect EC2 server with public keys "/root/.ec2/id_rsa-gsg-keypair" or "/root/.ec2/keypair.pem"

function fur () { curl -sL 'http://www.commandlinefu.com/commands/random/plaintext' | grep -v "^# commandlinefu" }
IFS=?" ; for i in * ; do mv -v $i `echo $i|tr ???????????????????\ aaaeeiooAAAEEIOOOcC_` ; done
ls -lFart |tail -n1
2011-10-17 19:49:14
User: jambino
Functions: ls tail
Tags: tail pipe ls
-2

List all files in a directory in reverse order by modified timestamp. When piped through tail the user will see the most recent file name.

cat /dev/zero > /dev/null &
2009-03-02 18:18:52
User: gustavold
Functions: cat
-2

Just waste some resources in a philosophical way

history | sed -e 's/^sudo //' | awk '{print $2}' | sort | uniq -c | sort -rn | head
2012-01-07 22:29:54
User: bibe
Functions: awk sed sort uniq
-2

I make an extensive use of sudo, so I had to exclude the sudo part of the command history

lynx -source http://www.commandlinefu.com/commands/random | sed 's/<[^>]*>//g' | head -1037 | tail -10 | sed -e 's/^[ \t]*//' | sed '/^$/d' | head -2
watch -tn1 'date -u +%T -d @$(expr $(date -d HH:MM +%s) - $(date +%s)) | toilet -f bigmono12'
2010-06-26 11:56:11
User: prayer
Functions: date expr watch
Tags: date time
-2

Change HH:MM with your target time.

This is for a Debian/Ubuntu GNU system. You need bash (package bash), date (package coreutils) and toilet (package toilet). Install with:

# apt-get install bash coreutils toilet toilet-fonts

find . -depth \( -path '*/*.java.orig' -o -path '*/*.java.orig/*' \) -delete
find . -name "*.pyc" -exec rm {} \;
2009-02-16 17:15:58
User: nsmgr8
Functions: find rm
-2

For a python project, sometimes I need to clean all the compiled python files. I have an alias 'rmpyc' to this command. This really saves me a lot of typing and hunting throughout the folders to delete those files.

grep -r 'keyword keyword2' your/path/ | grep -v svn
2009-07-08 20:48:11
User: anis
Functions: grep
-2

this command searches for a keyword or an expression in a path and avoids versionned files

mount | grep : | tr -s ' ' -d 3 | xargs umount -v
ls -F | sed -n 's/@$//p'
echo sleep() begins: %TIME% && FOR /l %a IN (10,-1,1) do (ECHO 1 >NUL %as&ping -n 2 -w 1 127.0.0.1>NUL) && echo sleep() end: %TIME%
2009-08-19 13:43:09
User: pfredrik
Functions: echo
-2

Enable 'sleep' function in Windows environment where this does not exist, although not exact in time. (there is a delay for each ping) This is a simple way to separate commands with a time-period.

find . -type d -name "*TestDir*" | wc -l
2011-01-24 22:38:27
User: linuxgeek
Functions: find wc
-2

A simple command to find the total number of subdirectories in current directory starting with specific name.

echo "1 2 3+p" | dc
find . -type f|perl -lne [email protected]=sort {$b->[0]<=>$a->[0]}[(stat($_))[7],$_],@x;splice(@x,11);print "@{$x[0]}";END{for(@x){print "@$_"}'
2012-01-08 14:43:43
User: bazzargh
Functions: find perl
Tags: sort perl find
-2

A different approach to the problem - maintain a small sorted list, print the largest as we go, then the top 10 at the end. I often find that the find and sort take a long time, and the large file might appear near the start of the find. By printing as we go, I get better feedback. The sort used in this will be much slower on perls older than 5.8.

nl filename | more
2009-05-04 07:35:16
User: haivu
Functions: nl
-2

The nl command lists the contents of a file where is each line is prefixed by a line number. For more information about this command, check out its man page. I tested under Mac OS X and Xubuntu 9.04

setxkbmap us
2010-01-23 04:08:46
User: keturn
-2

Restores the keyboard so your partner who expects the keys to correspond to what they're labelled can type (in qwerty).

printf "%.50d" 0 | tr 0 -
ls -l | sed -e 's/--x/1/g' -e 's/-w-/2/g' -e 's/-wx/3/g' -e 's/r--/4/g' -e 's/r-x/5/g' -e 's/rw-/6/g' -e 's/rwx/7/g' -e 's/---/0/g'
kill -HUP ` ps -aef | grep -i firefox | sort -k 2 -r | sed 1d | awk ' { print $2 } ' `