Commands using awk sorted by votes

Commands using awk (1,418)

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kill all processes using a directory/file/etc

This command will kill all processes using a directory. It's quick and dirty. One may also use a -9 with kill in case regular kill doesn't work. This is useful if one needs to umount a directory. Show Sample Output
This is sample output - yours may be different.
```
lsof|grep /data/| awk '{print $2}'|xargs kill
kill 1635: No such process
kill 1635: No such process
```
5

lsof|grep /somemount/| awk '{print $2}'|xargs kill

archlich · 2009-03-12 18:42:19 12
Play musical notes from octave of middle C

Are there any creative pieces of music that can be created using beep and the shell? I'd love to hear it!
This is sample output - yours may be different.
5

man beep | sed -e '1,/Note/d; /BUGS/,$d' | awk '{print $2}' | xargs -IX sudo beep -f X -l 500

jnash · 2009-04-01 06:48:48 10
List files above a given threshold

List files above a given size threshold. Show Sample Output
This is sample output - yours may be different.
```
./tapestry/tapestry-project-4.1.5-full.zip: 46M
./tapestry/tapestry-bin-5.1.0.1.zip: 29M
./tapestry/tapestry-bin-5.1.0.2.tar.bz2: 29M
./tapestry/tapestry-bin-5.1.0.0.zip: 29M
./tapestry/tapestry-project-4.1.3-full.tar.bz2: 27M
./tapestry/tapestry-bin-5.1.0.0.tar.gz: 29M
```
5

find . -type f -size +25000k -exec ls -lh {} \; | awk '{ print $8 ": " $5 }'

benajnim · 2009-04-02 15:01:17 8
Remove today's installed packages
This is sample output - yours may be different.
5

grep "install " /var/log/dpkg.log | awk '{print $4}' | xargs apt-get -y remove --purge

skygreg · 2009-04-06 13:06:04 10
get the top 10 longest filenames
This is sample output - yours may be different.
5

find | sed -e "s/^.*\///" | awk ' BEGIN { FS=""} { print NF " " $0 } ' | sort -nrf | head -10

nitehawk · 2009-04-13 21:03:07 5
Print IP of any interface. Useful for scripts.
This is sample output - yours may be different.
5

ip route show dev ppp0 | awk '{ print $7 }'

williamruckman · 2009-05-06 02:07:57 7
Get line number of all matches in a file
This is sample output - yours may be different.
5

awk '/match/{print NR}' file

inof · 2009-06-03 17:34:13 7
When was your OS installed?

shows also time if its the same year or shows year if installed before actual year and also works if /etc is a link (mac os) Show Sample Output
This is sample output - yours may be different.
```
Jul 15 11:46
or
Dec 24 2006
```
5

ls -lct /etc/ | tail -1 | awk '{print $6, $7, $8}'

peshay · 2009-09-04 16:52:50 5
(Git) Revert files with changed mode, not content

I sometimes (due to mismanagement!) end up with files in a git repo which have had their modes changed, but not their content. This one-liner lets me revert the mode changes, while leaving changed-content files be, so I can commit just the actual changes made.
This is sample output - yours may be different.
5

git diff --numstat | awk '{if ($1 == "0" && $2 == "0") print $3}' | xargs git checkout HEAD

lingo · 2009-09-17 22:12:50 11
print all except first collumn
This is sample output - yours may be different.
5

awk '{$1=""; print}'

hoberion · 2009-09-23 08:13:40 3
Get the total length of all videos in the current dir in H:m:s

You're behind on your TV catch-up, but how far behind? This command tries to open mplayer against all files in the current dir. If it's a video file it will contain ID_LENGTH, which is summed and output in hours, minutes and seconds. Someone better at awk could probably reduce this down a lot. Show Sample Output
This is sample output - yours may be different.
```
30529.18
8h:28m:49s
```
5

mplayer -vo dummy -ao dummy -identify * 2>&1 | grep ID_LENGTH | sed 's/.*=$[0-9]*$/\1/' | xargs echo | sed 's/ /+/g' | bc | awk 'S=$1; {printf "%dh:%dm:%ds\n",S/(60*60),S%(60*60)/60,S%60}'

Strawp · 2009-09-24 10:33:19 6

Plot frequency distribution of words from files on a terminal.

Uses the dumb terminal option in gnuplot to plot a graph of frequencies. In this case, we are looking at a frequency analysis of words in all of the .c files. Show Sample Output

This is sample output - yours may be different.

$ cat *.c | { printf "se te du\nplot '-' t '' w dots\n"; tr '[[:upper:]]' '[[:lower:]]' | tr -s [[:punct:][:space:]] '\n' | sort | uniq -c | sort -nr | head -n 100 | awk '{print $1}END{print "e"}'; } | gnuplot

  60 .+-----+------+------+------+-------+------+------+------+------+-----++
     +      +      +      +      +       +      +      +      +      +      +
     |                                                                      |
  50 ++                                                                    ++
     |                                                                      |
     |.                                                                     |
     |.                                                                     |
  40 ++                                                                    ++
     |                                                                      |
     | ..                                                                   |
  30 ++                                                                    ++
     |   .                                                                  |
     |                                                                      |
  20 ++  ..                                                                ++
     |     ..                                                               |
     |       ..                                                             |
     |         ...                                                          |
  10 ++           ....                                                     ++
     |                ...............                                       |
     +      +      +      +      +   .......................................+
   0 ++-----+------+------+------+-------+------+------+------+------+-----++
     0      10     20     30     40      50     60     70     80     90    100

cat *.c | { printf "se te du\nplot '-' t '' w dots\n"; tr '[[:upper:]]' '[[:lower:]]' | tr -s [[:punct:][:space:]] '\n' | sort | uniq -c | sort -nr | head -n 100 | awk '{print $1}END{print "e"}'; } | gnuplot

taliver · 2009-11-20 14:53:26 7

Weather on the Command line

Get your weather from a weather station just blocks from your home. Go to http://www.wunderground.com/wundermap/ and find a weather station near you. Click on a temperature bubble for that area. When the window pops up, click on hypertext link with the station ID, then on the bottom right of the page, click on the Current Conditions XML. Thats your link! Good luck! Show Sample Output
This is sample output - yours may be different.
```
53.1
```
5

lynx -dump http://api.wunderground.com/weatherstation/WXCurrentObXML.asp?ID=KCALOSAN32 | grep GMT | awk '{print $3}'

editorreilly · 2010-02-05 19:17:18 8
Get all mac address
This is sample output - yours may be different.
5

ifconfig | awk '/HWaddr/ { print $NF }'

unixmonkey8473 · 2010-02-27 20:20:12 6
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
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
Capture screen and mic input using FFmpeg and ALSA

Yet another x11grab using ffmpeg. I also added mic input to the capturing video stream using alsa. Yet I need to find out how to capture audio which is currently playing. Show Sample Output
This is sample output - yours may be different.
```
http://www.youtube.com/watch?v=K3gOxtXN5wc
```
5

ffmpeg -f alsa -itsoffset 00:00:02.000 -ac 2 -i hw:0,0 -f x11grab -s $(xwininfo -root | grep 'geometry' | awk '{print $2;}') -r 10 -i :0.0 -sameq -f mp4 -s wvga -y intro.mp4

mohan43u · 2010-03-31 09:33:05 6
Show interface/ip using awk

Interfaces like lo can be omitted from the beginning, there are probably better ways of doing this, i'm a noob at awk. Show Sample Output
This is sample output - yours may be different.
```
lo 127.0.0.1
wlan0 192.168.1.100
```
5

ifconfig -a| awk '/^wlan|^eth|^lo/ {;a=$1;FS=":"; nextline=NR+1; next}{ if (NR==nextline) { split($2,b," ")}{ if ($2 ~ /[0-9]\./) {print a,b[1]}; FS=" "}}'

alf · 2010-04-15 04:34:28 16
Get IPv4 of eth0 for use with scripts

I've been using it in a script to build from scratch proxy servers. Show Sample Output
This is sample output - yours may be different.
```
192.168.0.1
```
5

ifconfig eth0 | grep "inet " | cut -d ':' -f2 | awk '{print $1}'

jaimerosario · 2010-06-29 00:06:08 4
Revert all modified files in an SVN repo
This is sample output - yours may be different.
5

svn st | grep -e '^M' | awk '{print $2}' | xargs svn revert

ethanmiller · 2010-08-11 14:24:05 3
Fibonacci numbers with awk

recursive version, "pure" AWK Show Sample Output
This is sample output - yours may be different.
```
0
1
1
2
3
5
8
13
21
34
55
89
144
233
377
610
987
1597
2584
4181
6765
10946
17711
28657
```
5

awk 'func f(n){return(n<2?n:f(n-1)+f(n-2))}BEGIN{while(a<24){print f(a++)}}'

unefunge · 2010-11-24 10:40:08 7
Retrieve the size of a file on a server

- Where $URL is the URL of the file. - Replace the $2 by $3 at the end to get a human-readable size. Credits to svanberg @ ArchLinux forums for original idea. Edit: Replaced command with better version by FRUiT. (removed unnecessary grep)
This is sample output - yours may be different.
5

wget --spider $URL 2>&1 | awk '/Length/ {print $2}'

d3Xt3r · 2011-07-03 00:14:58 10
Lists all usernames in alphabetical order

Save some CPU, and some PIDs. :)
This is sample output - yours may be different.
5

awk -F ':' '{print $1 | "sort";}' /etc/passwd

atoponce · 2011-12-20 12:46:52 3
Find duplicate UID in /etc/passwd

You can use only awk
This is sample output - yours may be different.
5

awk -F":" '!list[$3]++{print $3}' /etc/passwd

richard · 2012-01-24 12:47:52 8

Search for packages, ranked by popularity

This will take the packages matching a given `apt-cache search` query (a collection of AND'd words or regexps) and tell you how popular they are. This is particularly nice for those times you have to figure out which solution to use for e.g. a PDF reader or a VNC client. Substitute "ubuntu.com" for "debian.org" if you want this to use Ubuntu's data instead. Everything else will work perfectly. Show Sample Output

apt-popcon() { (echo \#rank; apt-cache search "$@" |awk '$1 !~ /^lib/ {print " "$1" "}') |grep -Ff- <(wget -qqO- http://popcon.debian.org/by_inst.gz |gunzip); }

adamhotep · 2012-09-08 00:29:31 4

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Debug redirects between production reloads

Watches the headers of a curl, following any redirects and printing only the HTTP status and the location of the possible redirects.

List files with full path

Search git logs (case-insensitive)

Normally, searching git log comments is case sensitive. The -i luckily applies to the --grep switch.

Look for English words in /dev/urandom

* to get the English dictionary: wget http://www.mavi1.org/web_security/wordlists/webster-dictionary.txt

Ping all hosts on 192.168.1.0/24

Pings all the hosts on 192.168.1.0/24 in parallel, so it is very fast. Alive host IP addresses are echoed to stdout as pings are responded to.

Bitcoin Brainwallet Base58 Encoder

A bitcoin "brainwallet" is a secret passphrase you carry in your brain. The Bitcoin Brainwallet Private Key Base58 Encoder is the third of three functions needed to calculate a bitcoin PRIVATE key from your "brainwallet" passphrase. This base58 encoder uses the obase parameter of the amazing bc utility to convert from ASCII-hex to base58. Tech note: bc inserts line continuation backslashes, but the "read s" command automatically strips them out. I hope that one day base58 will, like base64, be added to the amazing openssl utility.

Protect directory from an overzealous rm -rf *

Forces the -i flag on the rm command when using a wildcard delete.

analyze traffic remotely over ssh w/ wireshark

This captures traffic on a remote machine with tshark, sends the raw pcap data over the ssh link, and displays it in wireshark. Hitting ctrl+C will stop the capture and unfortunately close your wireshark window. This can be worked-around by passing -c # to tshark to only capture a certain # of packets, or redirecting the data through a named pipe rather than piping directly from ssh to wireshark. I recommend filtering as much as you can in the tshark command to conserve bandwidth. tshark can be replaced with tcpdump thusly: $ ssh root@example.com tcpdump -w - 'port !22' | wireshark -k -i -

A formatting test for David Winterbottom: improving commandlinefu for submitters

Commandlinefu.com is great but has a few bugs when people are submitting new commands: . 1. There is no preview button. This was a minor inconvenience before, but now is a major problem since new commands won't show up to be edited until they have been moderated. . 2. White space in the description field and in the comments is almost completely lost. People resort to using periods in between paragraphs to force a line break. Indentation of code is ridiculous. . 3. Many characters get munged. . 3a. For example, a less than character in the description gets read as an HTML tag and discarded. In order to type a less than, I've had to type "<" (I hope that comes out right). Unfortunately, when re-editing a command, the HTML entity is turned into a literal less than character, which I have to change back by hand before saving. 3b. Some unicode characters work in the description field, but turn into ugly literal HTML strings when put in the sample output or in an additional command using the $ prefix. . For example, here is a unicode character: ❥ $ Here is the same character after a dollar sign: ❥ . 3c. Some unicode characters don't work anywhere. Bizarrely, it appears to be the most commonly needed ones, such as Latin-1 accented characters. Here are some examples, . Bullet: ?, Center dot: ?, Umlaut u: ?. . 4. Here is an example of the greater than, >, and less than,

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Commands using awk (1,418)

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