Commands using awk sorted by votes

Commands using awk (1,418)

sorted by

All IP connected to my host

find all computer connected to my host through TCP connection. Show Sample Output
This is sample output - yours may be different.
```
91.186.200.150
92.42.55.172
94.127.72.60
94.182.150.25
94.182.156.230
94.184.255.134
95.38.45.133
```
16

netstat -lantp | grep ESTABLISHED |awk '{print $5}' | awk -F: '{print $1}' | sort -u

bitbasher · 2011-07-21 21:23:10 16
Quick glance at who's been using your system recently

This command takes the output of the 'last' command, removes empty lines, gets just the first field ($USERNAME), sort the $USERNAMES in reverse order and then gives a summary count of unique matches. Show Sample Output
This is sample output - yours may be different.
```
1 wtmp
      2 reboot
     31 oracle
     15 jsmith
    142 jdoe
      3 root
```
15

last | grep -v "^$" | awk '{ print $1 }' | sort -nr | uniq -c

hkyeakley · 2009-02-18 16:38:59 13
Browse system RAM in a human readable form

This command lets you see and scroll through all of the strings that are stored in the RAM at any given time. Press space bar to scroll through to see more pages (or use the arrow keys etc). Sometimes if you don't save that file that you were working on or want to get back something you closed it can be found floating around in here! The awk command only shows lines that are longer than 20 characters (to avoid seeing lots of junk that probably isn't "human readable"). If you want to dump the whole thing to a file replace the final '| less' with '> memorydump'. This is great for searching through many times (and with the added bonus that it doesn't overwrite any memory...). Here's a neat example to show up conversations that were had in pidgin (will probably work after it has been closed)... sudo cat /proc/kcore | strings | grep '([0-9]\{2\}:[0-9]\{2\}:[0-9]\{2\})' (depending on sudo settings it might be best to run sudo su first to get to a # prompt)
This is sample output - yours may be different.
15

sudo cat /proc/kcore | strings | awk 'length > 20' | less

nesquick · 2009-03-09 02:19:47 19
Watch RX/TX rate of an interface in kb/s

Just a simple way without the need of additional tools. Of course, replace eth0 with your IF. Show Sample Output
This is sample output - yours may be different.
```
in:   4.1e+03           out:        88
```
15

while [ /bin/true ]; do OLD=$NEW; NEW=`cat /proc/net/dev | grep eth0 | tr -s ' ' | cut -d' ' -f "3 11"`; echo $NEW $OLD | awk '{printf("\rin: % 9.2g\t\tout: % 9.2g", ($1-$3)/1024, ($2-$4)/1024)}'; sleep 1; done

hons · 2011-03-22 10:02:23 8
Draw kernel module dependancy graph.

parse "lsmod" output to "dot" format and pass it to "display". Without perl!
This is sample output - yours may be different.
15

lsmod | awk 'BEGIN{print "digraph{"}{split($4, a, ","); for (i in a) print $1, "->", a[i]}END{print "}"}'|display

point_to_null · 2011-12-04 01:41:23 7
Fibonacci numbers with awk

Another combination of seq and awk. Not very efficient, but sufficiently quick. Show Sample Output
This is sample output - yours may be different.
```
1
1
2
3
5
8
13
21
34
55
89
144
233
377
610
987
1597
2584
4181
6765
10946
17711
28657
46368
75025
121393
196418
317811
514229
832040
1346269
2178309
3524578
5702887
9227465
14930352
24157817
39088169
63245986
102334155
165580141
267914296
433494437
701408733
1134903170
1836311903
2971215073
4807526976
7778742049
12586269025
```
14

seq 50| awk 'BEGIN {a=1; b=1} {print a; c=a+b; a=b; b=c}'

kaan · 2009-03-24 20:39:24 36
Number of open connections per ip.

Here is a command line to run on your server if you think your server is under attack. It prints our a list of open connections to your server and sorts them by amount. BSD Version: netstat -na |awk '{print $5}' |cut -d "." -f1,2,3,4 |sort |uniq -c |sort -nr Show Sample Output
This is sample output - yours may be different.
```
20 81.49.60.x
21 116.212.111.x
26 65.184.224.x
31 189.61.36.x
84 89.180.3.x
212 127.0.0.1
```
14

netstat -ntu | awk '{print $5}' | cut -d: -f1 | sort | uniq -c | sort -n

tiagofischer · 2009-03-28 21:02:26 73
List of commands you use most often

Plot your most used commands with gnuplot.
This is sample output - yours may be different.
14

history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head > /tmp/cmds | gnuplot -persist <(echo 'plot "/tmp/cmds" using 1:xticlabels(2) with boxes')

sthrs · 2010-06-13 23:35:13 7
Print all git repos from a user
This is sample output - yours may be different.
14

curl -s https://api.github.com/users/<username>/repos?per_page=1000 |grep git_url |awk '{print $2}'| sed 's/"$.*$",/\1/'

wuseman1 · 2019-11-19 20:31:19 262

Echo the latest commands from commandlinefu on the console

Self-referential use of wget. Show Sample Output

wget -O - http://www.commandlinefu.com/commands/browse/rss 2>/dev/null | awk '/\s*<title/ {z=match($0, /CDATA\[([^\]]*)\]/, b);print b[1]} /\s*<description/ {c=match($0, /code>(.*)<\/code>/, d);print d[1]"\n"} '

root · 2009-01-30 19:16:50 29

Displays the attempted user name, ip address, and time of SSH failed logins on Debian machines

A variation of a script I found on this site and then slimmed down to just use awk. It displays all users who have attempted to login to the box and failed using SSH. Pipe it to the sort command to see which usernames have the most failed logins. Show Sample Output
This is sample output - yours may be different.
```
a            210.51.0.75      Apr-14-00:45:23
admin        210.51.0.75      Apr-14-00:48:18
alexis       210.51.0.75      Apr-14-00:45:19
amal         210.51.0.75      Apr-14-00:46:18
anton        210.51.0.75      Apr-14-00:46:05
bot          210.51.0.75      Apr-14-00:45:45
```
13

awk '/sshd/ && /Failed/ {gsub(/invalid user/,""); printf "%-12s %-16s %s-%s-%s\n", $9, $11, $1, $2, $3}' /var/log/auth.log

frailotis · 2009-04-16 00:56:23 12

Purge configuration files of removed packages on debian based systems

Purge all configuration files of removed packages Show Sample Output

sudo aptitude purge `dpkg --get-selections | grep deinstall | awk '{print $1}'`

kelevra · 2009-04-28 11:44:04 15

Get all links of a website
This is sample output - yours may be different.
13

lynx -dump http://www.domain.com | awk '/http/{print $2}'

putnamhill · 2010-09-04 12:48:19 10
"Clone" a list of installed packages from one Debian/Ubuntu Server to another
This is sample output - yours may be different.
13

apt-get install `ssh root@host_you_want_to_clone "dpkg -l | grep ii" | awk '{print $2}'`

BoxingOctopus · 2011-05-10 13:33:51 7
du with colored bar graph

i'm using gawk, you may get varying mileage with other varieties. You might want to change the / after du to say, /home/ or /var or something, otherwise this command might take quite some time to complete. Sorry it's so obsfucated, I had to turn a script into a one-liner under 255 characters for commandlinefu. Note: the bar ratio is relative, so the highest ratio of the total disk, "anchors" the rest of the graph. EDIT: the math was slightly wrong, fixed it. Also, made it compliant with older versions of df. Show Sample Output
This is sample output - yours may be different.
```
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| /usr 5.71248% total
|||||||||||||||||||||||||||||||||||| /var 3.19542% total
||||||||||||||||| /home 1.49544% total
||||||||| /lib 0.75594% total
|| /boot 0.154587% total
```
13

t=$(df|awk 'NR!=1{sum+=$2}END{print sum}');sudo du / --max-depth=1|sed '$d'|sort -rn -k1 | awk -v t=$t 'OFMT="%d" {M=64; for (a=0;a<$1;a++){if (a>c){c=a}}br=a/c;b=M*br;for(x=0;x<b;x++){printf "\033[1;31m" "|" "\033[0m"}print " "$2" "(a/t*100)"% total"}'

kevinquinnyo · 2011-12-01 01:21:11 15
pattern match in awk - no grep

Rather than chain a string of greps together and pipe them to awk, use awk to do all the work. In the above example, a string would be output to stdout if it matched pattern1 AND pattern2, but NOT pattern3.
This is sample output - yours may be different.
12

awk '/pattern1/ && /pattern2/ && !/pattern3/ {print}'

themensch · 2009-02-05 15:18:19 41
count IPv4 connections per IP

usefull in case of abuser/DoS attacks. Show Sample Output
This is sample output - yours may be different.
```
14 111.111.111.111
     28 123.123.123.123
     34 0.0.0.0
```
12

netstat -anp |grep 'tcp\|udp' | awk '{print $5}' | sed s/::ffff:// | cut -d: -f1 | sort | uniq -c | sort -n

dt · 2009-02-15 09:16:16 19
command line calculator

simple function , floating point number is supported.
This is sample output - yours may be different.
12

calc(){ awk "BEGIN{ print $* }" ;}

twfcc · 2009-10-23 06:03:07 52
Capture video of a linux desktop

Proper screencast with audio using ffmpeg and x264, as per http://verb3k.wordpress.com/2010/01/26/how-to-do-proper-screencasts-on-linux/
This is sample output - yours may be different.
12

ffmpeg -y -f alsa -ac 2 -i pulse -f x11grab -r 30 -s `xdpyinfo | grep 'dimensions:'|awk '{print $2}'` -i :0.0 -acodec pcm_s16le output.wav -an -vcodec libx264 -vpre lossless_ultrafast -threads 0 output.mp4

NoahY · 2010-11-19 09:31:56 7
Target a specific column for pattern substitution

Awk replaces every instance of foo with bar in the 5th column only.
This is sample output - yours may be different.
12

awk '{gsub("foo","bar",$5)}1' file

zlemini · 2011-11-09 18:24:23 6
Show how old your linux OS installtion is

..not guaranteed to always be accurate but fun to see how old you Linux installation is based on the root partitions file system creation date. Show Sample Output
This is sample output - yours may be different.
```
Filesystem created:       Wed Aug  6 14:43:42 2008
```
12

sudo tune2fs -l $(df -h / |(read; awk '{print $1; exit}')) | grep -i created

thechile · 2013-08-08 15:18:09 17
du with colored bar graph

A more efficient way, with reversed order to put the focus in the big ones. Show Sample Output
This is sample output - yours may be different.
```
 41.37% ############################################################## Others
 17.96% ########################### Woody Allen
 13.19% #################### Argentina
 10.86% ################ Ingmar Bergman
  6.55% ########## Serbia
  3.92% ###### NI
  2.24% ### Luis Bu?uel
  0.95% # Jean Renoir
  0.66% # M?xico
  0.64% # Colombia
  0.45% # Charlie Chaplin
  0.45% # Leni Riefenstahl
  0.42% # Cuba
  0.36% # Chile
```
12

du -x --max-depth=1|sort -rn|awk -F / -v c=$COLUMNS 'NR==1{t=$1} NR>1{r=int($1/t*c+.5); b="\033[1;31m"; for (i=0; i<r; i++) b=b"#"; printf " %5.2f%% %s\033[0m %s\n", $1/t*100, b, $2}'|tac

point_to_null · 2015-09-12 10:36:49 22

computes the most frequent used words of a text file

cat WAR_AND_PEACE_By_LeoTolstoi.txt | tr -cs "[:alnum:]" "\n"| tr "[:lower:]" "[:upper:]" | awk '{h[$1]++}END{for (i in h){print h[i]" "i}}'|sort -nr | cat -n | head -n 30

cp · 2010-07-05 06:39:20 15

exclude a column with awk

Here's an awk alternative, for those lacking the version of cut with the --complement argument.
This is sample output - yours may be different.
11

awk '{ $5=""; print }' file

zlemini · 2010-10-22 09:48:49 3
Kill all Zombie processes (Guaranteed!)

It identifies the parents of the Zombie processes and kill them. So the new parent of orphan Zombies will be the Init process and he is already waiting for reaping them. Be careful! It may also kill your useful processes just because they are not taking care and waiting for their children (bad parents!). Show Sample Output
This is sample output - yours may be different.
```
No output. But if you want to see the PIDs of your Zombies' parents just use this piece:
ps -xaw -o state -o ppid | grep Z | grep -v PID | awk '{print $2}
```
11

kill -9 `ps -xaw -o state -o ppid | grep Z | grep -v PID | awk '{print $2}'`

khashmeshab · 2010-10-27 07:29:14 12
< 1 2 3 4 > 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

list files recursively by size

Function to split a string into an array

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

Convert a flv video file to avi using mencoder

Display a random crass ascii art from www.asciiartfarts.com

Optionally, pipe the output into http://sed.sourceforge.net/grabbag/scripts/html2iso.sed Or: wget -qO - http://www.asciiartfarts.com/random.cgi | sed -n '//,//p' | sed -n '/

Convert seconds to [DD:][HH:]MM:SS

Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Your name backwards

Rename files in batch

Grab mp3 files from your favorite netcasts, mp3blog, or sites that often have good mp3s

This was gotten from http://www.veen.com/jeff/archives/000573.html. The line will grab all the mp3 files on the urls listed in text file sourceurls.txt (one url per line) . A much more complete breakdown of the line can be found at the web site mentioned above.

Check syntax of remote ruby file

a find and replace within text-based files, to locate and rewrite text en mass.

syntax follows regular command line expression. example: let's say you have a directory (with subdirs) that has say 4000 .php files. All of these files were made via script, but uh-oh, there was a typo! if the typo is "let's go jome!" but you meant it to say "let's go home!" find . -name "*.php" | xargs perl -pi -e "s/let\'s\ go\ jome\!/let\'s\ go\ home\!/g" all better :) multiline: find . -name "*.php" | xargs perl -p0777i -e 's/knownline1\nknownline2/replaced/m' indescriminate line replace: find ./ -name '*.php' | xargs perl -pi -e 's/\".*$\"/\new\ line\ content/g'

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)
» commands using awk

Commands using awk (1,418) 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…

Commands using awk (1,418)

sorted by