Commands using awk sorted by votes

Commands using awk (1,418)

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netstat -p recoded (totaly useless..)

Ok so it's rellay useless line and I sorry for that, furthermore that's nothing optimized at all... At the beginning I didn't managed by using netstat -p to print out which process was handling that open port 4444, I realize at the end I was not root and security restrictions applied ;p It's nevertheless a (good ?) way to see how ps(tree) works, as it acts exactly the same way by reading in /proc So for a specific port, this line returns the calling command line of every thread that handle the associated socket
This is sample output - yours may be different.
-5

p=$(netstat -nate 2>/dev/null | awk '/LISTEN/ {gsub (/.*:/, "", $4); if ($4 == "4444") {print $8}}'); for i in $(ls /proc/|grep "^[1-9]"); do [[ $(ls -l /proc/$i/fd/|grep socket|sed -e 's|.*\[$.*$\]|\1|'|grep $p) ]] && cat /proc/$i/cmdline && echo; done

j0rn · 2009-04-30 12:39:48 630
Kill a daemon by name, not by PID

Just find out the daemon with $ netstat -atulpe. Then type in his name and he gets the SIGTERM.
This is sample output - yours may be different.
-5

kill_daemon() { echo "Daemon?"; read dm; kill -15 $(netstat -atulpe | grep $dm | cut -d '/' -f1 | awk '{print $9}') }; alias kd='kill_daemon

P17 · 2009-05-26 20:39:56 7
To print a specific line from a file

I don't know if it's better but works fine :)
This is sample output - yours may be different.
-5

awk '{if (NR == 3) print}' <file>

yooreck · 2009-10-19 15:58:09 5
search for and kill a process in one blow
This is sample output - yours may be different.
-5

ps aux|grep -i [p]rocessname|awk '{ print $2 }'|xargs kill

billcarroll · 2010-04-10 18:42:27 17
How many lines does the passwd file have?
This is sample output - yours may be different.
-5

awk 'END {print NR}' /etc/passwd

Leo_Gutierrez · 2011-06-23 00:33:40 3
Print only the odd lines of a file
This is sample output - yours may be different.
-6

awk '{if (NR % 2 == 1) print $0}' file.txt

twopoint718 · 2009-02-05 18:43:19 24
Check if Fail2Ban is Running

Check if Fail2Ban is running on the system and alert it with a message in the terminal Show Sample Output
This is sample output - yours may be different.
```
[INFO] Fail2Ban is not running

or:

[INFO] Fail2Ban is running and the PID is 3557
```
-6

FAIL2BAN=`ps ax | grep fail2ban | grep -v grep | awk {'print $1'}` && if [ -n "$FAIL2BAN" ]; then printf "\n[INFO] Fail2Ban is running and the PID is %s\n\n" $FAIL2BAN; else printf "\n [INFO] Fail2Ban is not running\n\n"; fi

fmdlc · 2009-02-11 04:36:49 8
kill some pids without specific pid

search_criteria = what do you want to kill pid = pid of you dont kill
This is sample output - yours may be different.
-6

kill -9 `ps aux | grep "search_criteria" | awk '{if ($2 != pid) print $2}'`

ozgurkuru · 2010-09-16 08:52:59 6
Kill any process with one command using program name

Removed unneeded grep -v by making the initial grep unable to match itself.
This is sample output - yours may be different.
-6

ps -ef | grep [j]boss | awk '{print $2}'|xargs kill -9

utoxin · 2010-09-30 15:55:41 3
get LAN ip

get the ip address on your LAN Show Sample Output
This is sample output - yours may be different.
```
192.168.1.102
```
-6

ifconfig |grep broadcast | awk '{print $2}'

fotoflo · 2012-12-05 03:57:46 4
ps -ef | grep PROCESS | grep -v grep | awk '{system "kill -9" $2}
This is sample output - yours may be different.
-6

ps -ef | grep PROCESS | grep -v grep | awk '{system "kill -9" $2}

pepin · 2015-03-21 21:25:07 11
This is a nice way to kill processes.. the example below is for firefox!!! substitute firefox for whatever the process name is...

This is a nice way to kill processes.. the example here is for firefox!!! substitute firefox for whatever the process name is... Show Sample Output
This is sample output - yours may be different.
```
kill -9 7491 
kill -9 7506 
kill -9 7434 
kill -9 7532
```
-7

ps aux | grep -i firefox | grep -v grep | awk '{print $2}' | xargs -t -i kill -9 {}

blackdude · 2009-02-19 18:50:00 11
kill all instances of an annoying or endless, thread-spawning process
This is sample output - yours may be different.
-7

ps auxwww | grep outofcontrolprocess | awk '{print $9}' | xargs kill -9

fpater · 2009-02-20 21:49:38 6
Kill all processes matching a given name

This command kills all processes with 'SomeCommand' in the process name. There are other more elegant ways to extract the process names from ps but they are hard to remember and not portable across platforms. Use this command with caution as you could accidentally kill other matching processes! xargs is particularly handy in this case because it makes it easy to feed the process IDs to kill and it also ensures that you don't try to feed too many PIDs to kill at once and overflow the command-line buffer. Note that if you are attempting to kill many thousands of runaway processes at once you should use 'kill -9'. Otherwise the system will try to bring each process into memory before killing it and you could run out of memory. Typically when you want to kill many processes at once it is because you are already in a low memory situation so if you don't 'kill -9' you will make things worse
This is sample output - yours may be different.
-7

ps axww | grep SomeCommand | awk '{ print $1 }' | xargs kill

philiph · 2009-02-28 17:48:51 11
Pretty print output of

Show Sample Output
This is sample output - yours may be different.
```
1:
root
3410
00:00:00
gpm -m /dev/input/mice -t exps2

2:
root
3424
00:00:00
crond

3:
root
3488
00:00:00
/usr/sbin/atd
```
-8

ps -ef | awk -v OFS="\n" '{ for (i=8;i<=NF;i++) line = (line ? line FS : "") $i; print NR ":", $1, $2, $7, line, ""; line = "" }'

djangofan · 2012-12-04 15:59:53 9
send Everyone on your machine some love

This works just like write or wall ... cept one thing the sender is anonymous ... if you really want to drive everyone insane replace echo \"The Matrix has you...\" with cat /dev/urandom nice one to do on April fool's day Show Sample Output
This is sample output - yours may be different.
```
The Matrix has you... (on all writable ttys)
```
-12

w | egrep -v '(load|FROM)' | awk '{print $2}' | sed 's/^/tty/' | awk '{print "echo \"The Matrix has you...\" >> /dev/" $1}' | bash

copremesis · 2009-04-29 22:04:56 10
get LAN ip

get the ip address on your LAN Show Sample Output
This is sample output - yours may be different.
```
192.168.1.102
```
-12

ifconfig |grep broadcast | awk '{print $2}'

fotoflo · 2012-12-05 03:57:51 9
for i in $(grep 'mystring' myfile1)|awk '{print $1}'); do grep $1 myfile2;done
This is sample output - yours may be different.
-14

for i in $(grep 'mystring' myfile1)|awk '{print $1}'); do grep $1 myfile2;done

msh · 2011-03-15 16:18:29 5
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Decode base64-encoded file in one line of Perl

Another option is openssl.

A fun thing to do with ram is actually open it up and take a peek. This command will show you all the string (plain text) values in ram

Play awesome rythmic noise using aplay

Try modifying the numbers in the "(i*(i>>8|i>>9)&46&i>>8))^(i&i>>13|i>>6)" part. Crudely stolen from http://www.xkcdb.com/9067

Decrypt passwords from Google Chrome and Chromium.

Read this before you down voting and comment that it is not working -> Wont work on latest versions ~75> since database file is locked and has to be decrypted. This is useful if you have an old hdd with a chrome installation and want to decrypt your old passwords fast.

Colour part of your prompt red to indicate an error

If the return code from the last command was greater than zero, colour part of your prompt red. The commands give a prompt like this: [user current_directory]$ After an error, the "[user" part is automatically coloured red. Tested using bash on xterm and terminal. Place in your .bashrc or .bash_profile.

commandline dictionary

Note: 1) Replace 'wonder' with any word you looking the meaning for in the above example 2) Need to install these packages: wordnet & wordnet-base (latter should be automatically installed because of dependency) 3) Combined size of packages is about 30MB on my old ubuntu system (I find it worth it)

power off system in X minutes

Replace 60 with the number of minutes until you want the machine to shut down. Alternatively give an absolute time in the format hh:mm (shutdown -h 9:30) Or shutdown right away (shutdown -h now)

Rename files in batch

Convert one file from ISO-8859-1 to UTF-8.

Nothing fancy it just converts one file from one character encoding into another one.

Get a stream feed from a Twitter user

*** CAREFULLY READ THE NOTES **** *** THIS DOES NOT WORK "OUT OF THE BOX" *** You'll need a few minutes of CAREFUL reading before making your own Twitter feed: In 2010 simple command line Twitter feed requests all stopped working because Twitter upgraded to SSL security. Https requests for a filtered Twitter stream feed now require a special header called "oauth_header". The benefit is that your stream feed and login info is securely encrypted. The bad news is that an "oauth_header" takes some work to build. Fortunately, four functions, imaginatively named step1, step2, step3 and step4 can be used to build a customized oauth_header for you in a few minutes. Now, go look at "step1" to start creating your own oauth_header!

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Commands using awk (1,418)

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