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Print all fields in a file/output from field N to the end of the line
This is sample output - yours may be different.
2

cut -f N- file.dat

sklm · 2009-08-31 23:08:18 4
Find files that were modified by a given command

Traces the system calls of a program. See http://linuxhelp.blogspot.com/2006/05/strace-very-powerful-troubleshooting.html for more information.
This is sample output - yours may be different.
3

strace <name of the program>

eitland · 2009-08-31 20:42:50 10
Print all fields in a file/output from field N to the end of the line

This command will print all fields from the given input to the end of each line, starting with the Nth field.
This is sample output - yours may be different.
0

awk '{print substr($0, index($0,$N))}'

mstoecker · 2009-08-31 19:47:10 6
Find files that were modified by a given command

This has helped me numerous times trying to find either log files or tmp files that get created after execution of a command. And really eye opening as to how active a given process really is. Play around with -anewer, -cnewer & -newerXY Show Sample Output
This is sample output - yours may be different.
```
[root@localhost ~]# touch /tmp/service
[root@localhost ~]# service cups restart
Stopping cups:                                             [  OK  ]
Starting cups:                                             [  OK  ]
[root@localhost ~]# find /var -newer /tmp/service
/var/cache/cups/job.cache
/var/lock/subsys
/var/lock/subsys/cups
/var/log/audit/audit.log
/var/run
/var/run/cupsd.pid
/var/run/cups
/var/run/cups/cups.sock
/var/run/cups/certs
/var/run/cups/certs/0
[root@localhost ~]#
```
22

touch /tmp/file ; $EXECUTECOMMAND ; find /path -newer /tmp/file

matthewdavis · 2009-08-31 18:47:19 11

xargs can be used in this manner to download multiple files at a time, and xargs will in this case run 10 processes at a time and initiate a new one when the number running falls below 10. Show Sample Output

wget -nv http://en.wikipedia.org/wiki/Linux -O- | egrep -o "http://[^[:space:]]*.jpg" | xargs -P 10 -r -n 1 wget -nv

grokskookum · 2009-08-31 18:37:33 55

How to run a command on a list of remote servers read from a file

dsh - Distributed shell, or dancer?s shell ;-) you can put your servers into /etc/dsh/machines.list than you don't have to serperate them by commata or group them in different files and only run commands for this groups dsh -M -c -a -- "apt-get update" Show Sample Output
This is sample output - yours may be different.
```
micha@lucie:~$ dsh -M -c -f test -- "hostname -f"
root@abc.de: abc.de
root@xyz.de: xyz
```
4

dsh -M -c -f servers -- "command HERE"

foob4r · 2009-08-31 12:08:38 3
See the order for DNS resolution on your Mac
This is sample output - yours may be different.
-1

scutil --dns

romant · 2009-08-31 10:34:08 3
Who needs pipes?

or: C
This is sample output - yours may be different.
6

B <<< $(A)

asg0451 · 2009-08-30 20:20:18 11
Intall not signed packeges with yum

Same as: 1 rpm -ivh package.rpm 2 yum localinstall package.rpm 3 Edit /etc/yum.conf or repository.repo and change the value of gpgcheck from 1 to 0 (!dangerous)
This is sample output - yours may be different.
-1

yum --nogpgcheck install "examplePackage"

iDen · 2009-08-30 18:18:30 3
Top 10 requestors by IP address from Apache/NCSA Logs
This is sample output - yours may be different.
3

awk '{print $1}' /var/log/httpd/access_log | sort | uniq -c | sort -rnk1 | head -n 10

flip387 · 2009-08-30 15:32:26 3
Get list of all Apache Virtual Host and which is default for each IP address

Show Sample Output
This is sample output - yours may be different.
```
VirtualHost configuration:
1.2.3.4:80     is a NameVirtualHost
         default server domain.com (/etc/httpd/conf.d/domain_virhost.conf:1)
         port 80 namevhost domain.com (/etc/httpd/conf.d/domain_virhost.conf:1)
Syntax OK
```
-1

httpd -S

flip387 · 2009-08-30 15:28:39 4
Run a cron job every 15 mins past the hour

Instead of using: 0,15,30,45 * * * * /path/to/command
This is sample output - yours may be different.
-9

*/15 * * * * /path/to/command

sharfah · 2009-08-30 14:53:08 3
show all key and mouse events

for mousevents, move the mouse over the window and click/move etc. usefull for getting mouseKeys, or keyKeys. also usefull for checking if X gets those mouse-events.
This is sample output - yours may be different.
3

xev

linuxswords · 2009-08-30 14:41:16 10
get all pdf and zips from a website using wget

If the site uses https, use: wget --reject html,htm --accept pdf,zip -rl1 --no-check-certificate https-url
This is sample output - yours may be different.
17

wget --reject html,htm --accept pdf,zip -rl1 url

linuxswords · 2009-08-30 14:05:09 6
Search gpg keys from commandline
This is sample output - yours may be different.
1

gpg --search-keys

linuxswords · 2009-08-30 13:52:29 3
convert mp3 into mb4 (audiobook format)

to convert a whole directory, put all mp3 files in a for loop for i in $(ls *mp3); do mpg123 -s $i | faac -b 80 -P -X -w -o ${i%mp3}m4b -; done
This is sample output - yours may be different.
1

mpg123 -s input.mp3 | faac -b 80 -P -X -w -o output.m4b -

linuxswords · 2009-08-30 13:15:37 3
rkhunter (Rootkit Hunter) is a Unix-based tool that scans for rootkits, backdoors and possible local exploits. rkhunter is a shell script which carries out various checks on the local system to try and detect known rootkits and malware. It also performs c

rkhunter (Rootkit Hunter) is a Unix-based tool that scans for rootkits, backdoors and possible local exploits. rkhunter is a shell script which carries out various checks on the local system to try and detect known rootkits and malware. It also performs checks to see if commands have been modified, if the system startup files have been modified, and various checks on the network interfaces, including checks for listening applications.
This is sample output - yours may be different.
-2

rkhunter --check

unixbhaskar · 2009-08-30 12:53:33 7
Check the backdoors and security.chkrootkit is a tool to locally check for signs of a rootkit.

chkrootkit is a tool to locally check for signs of a rootkit,Get it from the website http://www.chkrootkit.org
This is sample output - yours may be different.
-1

chkrootkit -x | less

unixbhaskar · 2009-08-30 12:47:08 3
Creating shortened URLs from the command line

Show Sample Output
This is sample output - yours may be different.
```
$ curl -s http://tinyurl.com/create.php?url=http://www.commandlinefu.com/ | sed -n 's/.*$http:\/\/tinyurl.com\/[a-z0-9][a-z0-9]*$.*/\1/p'
http://tinyurl.com/d52z2c
```
1

curl -s http://tinyurl.com/create.php?url=http://<website.url>/ | sed -n 's/.*$http:\/\/tinyurl.com\/[a-z0-9][a-z0-9]*$.*/\1/p' | uniq

amaymon · 2009-08-30 07:55:48 8
A snooze button for xmms2 alarm clock

you can also run "xmms2 pause & at now +5min
This is sample output - yours may be different.
2

xmms2 pause && echo "xmms2 play" | at now +5min

Vrekk · 2009-08-30 04:35:10 3
Show Mac OS X version information
This is sample output - yours may be different.
2

sw_vers

theoj · 2009-08-29 21:27:18 3
check the fucking weather

grab the weather, with a little expletive fun. replace the 48104 with a US zipcode, or the name of your city (such as ZIP="oslo"), unless you want to know what the weather is like for me (and that's fine too) Show Sample Output
This is sample output - yours may be different.
```
70 - ITS FUCKING NICE
```
1

ZIP=48104; curl http://thefuckingweather.com/?zipcode=$ZIP 2>/dev/null|grep -A1 'div class="large"'|tr '\n' ' '|sed 's/^.*"large" >$..$/\1/;s/&d.* <br \/>/ - /;s/<br \/>//;s/<\/div.*$//'

sleepynate · 2009-08-29 19:33:35 102

To find how Apache has been compiled from commandline

To get information at your fingertips about Apache compilation. Show Sample Output

-1

httpd2 -V

unixbhaskar · 2009-08-29 13:04:37 3

Another way to see the network interfaces

Like many other thing in Linux ,you can see the same thing in different way. Show Sample Output

ip addr show

unixbhaskar · 2009-08-29 12:52:02 3

Get the information about the Apache loaded modules from command line

This is a handy way to find which modules are loaded with Apache web server. Show Sample Output

-1

httpd2 -M

unixbhaskar · 2009-08-29 12:46:10 3

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backup with mysqldump a really big mysql database to a remote machine over ssh

backup big mysql db to remote machine over ssh. "--skip-opt" option is needed when you can?t allocate full database in ram.

Nice beep

Insert the last command without the last argument (bash)

$/usr/sbin/ab2 -f TLS1 -S -n 1000 -c 100 -t 2 http://www.google.com/ then $!:- http://www.commandlinefu.com/ is the same as $/usr/sbin/ab2 -f TLS1 -S -n 1000 -c 100 -t 2 http://www.commandlinefu.com/

A trash function for bash

apt-get install trash-cli Commandline program that allows you put folders or files in the standard KDE/Unity desktop trash.

download newest adminer and rename to it's version accordingly

If the version already downloaded. it will not download again

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)

Unpack .tgz File On Linux

With -a you don't care about file type (bz2, gzip, etc.)

display a smiling smiley if the command succeeded and a sad smiley if the command failed

you could save the code between if and fi to a shell script named smiley.sh with the first argument as and then do a smiley.sh to see if the command succeeded. a bit needless but who cares ;)

shuffle lines via bash

Using perl in a one-liner is a bit overkill to randomly sort some input. `sort` from coreutils should be enough.

Create/open/use encrypted directory

Create/open/use an encrypted directory encfs needs to be installed During creation easiest to use default values The encrypted files will be in ~/.crypt and you will work as usual in ~/crypt To close the encrypted directory run: fusermount -u ~/crypt When you switch off the computer the encrypted directory will be automatically closed This example uses /home/user/crypt as encrypted directory I use ubuntu linux 8.04 and I am also the creator of www.minihowto.org

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