Commands using awk sorted by votes

Commands using awk (1,418)

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List you configure's ip address in your system

List system current active ip address Show Sample Output
This is sample output - yours may be different.
```
eth0    192.168.10.75/24
eth1    10.0.15.4/24
```
0

ip addr list | grep global | awk '{print $7"\t"$2}'

tevisky · 2013-08-08 13:05:35 7
To find a class/properties/xml in collection of jars
This is sample output - yours may be different.
0

for i in `find . -name "*.jar"`; do jar -tvf $i | grep -v /$ | awk -v file=$i '{print file ":" $8}'; done > all_jars.txt

rajashekar · 2013-08-09 17:03:30 6
Remove semaphores

Solves these pesky errors you see in the Apache log: [Fri Jun 28 17:51:00 2013] [emerg] (28)No space left on device: Couldn't create accept lock (/monsoon/opt/apache2/logs/accept.lock.356) (5) Naturally, can be used to get rid of other semaphores. Note: change the apache user in accordance to your ENV. Show Sample Output
This is sample output - yours may be different.
```
It works quietly, unless you have no sem IDs attached to this user [in this case, apache]
```
0

ipcs -s | grep apache | awk ' { print $2 } ' | xargs ipcrm sem

kernel01 · 2013-08-12 16:29:32 194
all java -Xmx values in a system, add them up

This will find all the -Xmx[BIGINT] running on a system, add them up for you and give you the total. Show Sample Output
This is sample output - yours may be different.
```
39424
```
0

output=$(ps -ef|grep -i java 2>/dev/null); for w in ${output[@]}; do if [[ $w =~ .*Xmx.* ]]; then result=$(grep -oP "[0-9]+" <<< $w); echo $result ;fi ; done| awk 'BEGIN {sum=0} {for(i=1; i<=NF; i++) sum+=$i } END {print sum}'

massiverobot · 2013-08-13 14:04:17 7
Find ur local network cidr Notation

This command give you Just the Network Cidr Notation Show Sample Output
This is sample output - yours may be different.
```
/8
/16
/24
/32
```
0

ip addr show |grep -w inet | grep -v 127.0.0.1 | awk '{ print $2}'| cut -d "/" -f 2

htmlgifted · 2013-08-17 18:54:23 12
compute the qps according to the latest n lines of logs
This is sample output - yours may be different.
0

tail -n 1000 access.log | grep "200 POST" | awk '{print substr($3,0,9)}' | awk '{data[$0]++}END{for(item in data){print item, data[item]}}'

hefei1986 · 2013-08-19 08:15:33 11
get the current weather in NYC, in human readable form
This is sample output - yours may be different.
0

curl -s poncho.is/forecast/new_york/today/ | grep -E 'og:title|og:description' | cut -d\" -f4 | awk '{print $0,"<p>"}' | lynx -stdin -dump

jc · 2013-08-21 21:43:11 46
Remove all message queues owned by user foo
This is sample output - yours may be different.
0

ipcs -q | grep foo | awk '{print $2}' | xargs -I ipcid ipcrm -q ipcid

eko · 2013-08-29 15:08:13 14
Quick and dirty list of installed packages on deb based system
This is sample output - yours may be different.
0

apt-cache -n dumpavail | grep 'Package:' | awk '{print $2 }'

txmoose · 2013-08-30 15:58:41 9
Find a machine's IP address and FQDN
This is sample output - yours may be different.
0

for i in `ip addr show dev eth1 | grep inet | awk '{print $2}' | cut -d/ -f1`; do echo -n $i; echo -en '\t'; host $i | awk '{print $5}'; done

BoxingOctopus · 2013-09-05 17:50:33 7
Get IP address from domain

Show Sample Output
This is sample output - yours may be different.
```
123.123.123.123
```
0

host example.com | head -1 | awk '{print $4}'

wes · 2013-09-05 22:20:49 7
Changes the initial login group for all users with GID > 500 (specified with LIMIT), to group YOURGROUP

Credit for the awk command goes to: http://www.cyberciti.biz/faq/howto-move-migrate-user-accounts-old-to-new-server/
This is sample output - yours may be different.
0

for I in $(awk -v LIMIT=500 -F: '($3>=LIMIT) && ($3!=65534)' /etc/passwd | cut -f 1-1 -d ':' | xargs); do usermod -g YOURGROUP $I ; done

Edoard · 2013-09-06 15:18:16 6
Get the Nth argument of the last command in $HISTFILE

This gets the Nth argument in the last line of your history file. This is useful where history is being written after each command, and you want to use arguments from the previous command in the current command, such as when doing copies/moving directories etc. I wrote this after getting irritated with having to continually type in long paths/arguments. You could also use $_ if all you want is the last argument. Show Sample Output
This is sample output - yours may be different.
```
$ echo "This little piggy went to the market"
This little piggy went to the market
$ garg 5
went
```
0

function garg () { tail -n 1 ${HISTFILE} | awk "{ print \$$1 }" }

plasticphyte · 2013-09-10 04:07:46 10
print all available make targets
This is sample output - yours may be different.
0

make --print-data-base --dry-run | awk -F':' '/^[a-zA-Z0-9][^$#\/\t=]*:([^=]|$)/ {split($1,A,/ /);for(i in A)print A[i]}'

grapsus · 2013-10-07 12:39:25 6
Check where mail was sent from
This is sample output - yours may be different.
0

grep cwd /var/log/exim_mainlog | grep -v /var/spool | awk -F"cwd=" '{print $2}' | awk '{print $1}' | sort | uniq -c | sort -n

franB · 2013-10-09 20:59:14 7
Find Duplicate Files (based on size first, then MD5 hash)

* Find all file sizes and file names from the current directory down (replace "." with a target directory as needed). * sort the file sizes in numeric order * List only the duplicated file sizes * drop the file sizes so there are simply a list of files (retain order) * calculate md5sums on all of the files * replace the first instance of two spaces (md5sum output) with a \0 * drop the unique md5sums so only duplicate files remain listed * Use AWK to aggregate identical files on one line. * Remove the blank line from the beginning (This was done more efficiently by putting another "IF" into the AWK command, but then the whole line exceeded the 255 char limit). >>>> Each output line contains the md5sum and then all of the files that have that identical md5sum. All fields are \0 delimited. All records are \n delimited.
This is sample output - yours may be different.
0

find . -type f -not -empty -printf "%-25s%p\n"|sort -n|uniq -D -w25|cut -b26-|xargs -d"\n" -n1 md5sum|sed "s/ /\x0/"|uniq -D -w32|awk -F"\0" 'BEGIN{l="";}{if(l!=$1||l==""){printf "\n%s\0",$1}printf "\0%s",$2;l=$1}END{printf "\n"}'|sed "/^$/d"

alafrosty · 2013-10-22 13:34:19 7
Delete keys from Redis by matching a pattern

Delete items from Redis, using redis-cli, by matching a key pattern. Show Sample Output
This is sample output - yours may be different.
```
(integer) 1
(integer) 1
(integer) 1
(integer) 1
(integer) 1
```
0

for key in `echo 'KEYS pattern*' | redis-cli | awk '{print $1}'`; do echo DEL $key; done | redis-cli

caiosba · 2013-10-29 04:50:35 10
Use awk's FIELDWIDTHS function to manipulate a string.
This is sample output - yours may be different.
0

echo "rootgot" | awk 'BEGIN{FIELDWIDTHS="4 3"}{print $2$1}'

in2nix4life · 2013-11-06 14:17:37 6
Search ruby-files with non-ascii character, but without encoding directive

Show Sample Output
This is sample output - yours may be different.
```
app/models/foo.rb
```
0

grep -l --include '*.rb' --include '*.rake' '^[^#]*[^a-zA-Z0-9[:punct:][:space:]]' -R . | xargs -L1 awk '!/encoding/ && NR < 2 { print FILENAME }'

numbata · 2013-11-13 21:41:42 6
List user processes with their memory usage and total usage.

Add up the amount of memory your processes are using and display the total. Replace marcanuy with your desired username. Show Sample Output
This is sample output - yours may be different.
```
    PID   RSS COMMAND
 194491  1756 sshd: marcanuy@pts/0
 194501  2056 -bash
 200189  1132 ps -u marcanuy -o pid,rss,command
 200190   960 awk {print $0}{sum+=$2} END {print "Total", sum/1024, "MB"}
 221029  7916 php54 /home/marcanuy/devs/tweets.php
 221030  7632 php54 /home/marcanuy/devs/parser.php
Total 20.9492 MB
```
0

ps -u marcanuy -o pid,rss,command | awk '{print $0}{sum+=$2} END {print "Total", sum/1024, "MB"}'

marcanuy · 2013-11-20 01:21:59 7
dpkg - undo selection of installed packages for deinstall

If you run dpkg --clear-selections or have otherwise selected installed packages for deinstall, but want to undo it, run this. It will set all installed packages back to installed status so that they won't be removed by commands like "dpkg -Pa"
This is sample output - yours may be different.
0

dpkg -l | grep ^ri | awk '{print $2 " install"}' | sudo dpkg --set-selections

ajmccluskey · 2013-11-23 06:41:18 14
Remove all older kernels then the current running kernel for Ubuntu/Debian base system
This is sample output - yours may be different.
0

export KEEP_KERNEL=2; dpkg -l 'linux-image*' | awk '/^ii/ { print $2 }' | grep "[0-9]" | awk 'BEGIN{i=1}{print i++, $0}' | grep `uname -r` -B99 | sort -r | tail -n+$(($KEEP_KERNEL+2)) | awk '{print $2}'| xargs apt-get -y purge

The_IceMan_Blog · 2013-11-23 15:35:42 7
Kill all processes found in grep

Kills all processes with a certain string. This was done to kill all ssh sessions openned by zenoss which look like: usr/bin/ssh /opt/zenoss/bin/zenmodeler
This is sample output - yours may be different.
0

for line in `ps aux | grep <string> | awk '{print $2}'`; do sudo kill $line; done;

mjbrune · 2013-11-24 00:02:16 17
list executed files current dir
This is sample output - yours may be different.
0

ls -al | awk '/^-rwx/ {print $9}'

qixingyue · 2013-11-24 03:37:49 7
fstab update
This is sample output - yours may be different.
0

mv /etc/fstab /etc/fstab.old && mount | awk '{print $1, $3, $5, $6}'| sed s/$//g|sed s/$/' 0 0'/g >> /etc/fstab

cas_alexi · 2013-11-26 06:31:27 6
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Display time of accounts connection on a system

Works on CentOS ad OpenBSD too, display time of accounts connection on a system, -p option print individual user's statistics.

Both view and pipe the file without saving to disk

This is a cool trick to view the contents of the file on /dev/pts/0 (or whatever terminal you're using), and also send the contents of that file to another program by way of an unnamed pipe. All the while, you've not bothered saving any extra data to disk, like you might be tempted to do with sed or grep to filter output.

reduce mp3 bitrate (and size, of course)

Useful if you have to put some mp3 files into mobile devices (ie mobile phones with no much memory)

en/decrypts files in a specific directory

To decrypt the files replace "ccenrypt" with "ccdecrypt. ccrypt(1) must be installed. It uses the AES (Rijndael) block cipher. To make it handier create an alias.

convert single digit to double digits

Uses 'rename' to pad zeros in front of first existing number in each filename. The "--" is not required, but it will prevent errors on filenames which start with "-". You can change the "2d" to any number you want, equaling the total numeric output: aka, 4d = ????, 8d = ????????, etc. I setup a handful of handy functions to this effect (because I couldn't figure out how to insert a var for the value) in the form of 'padnum?', such as: padnum5 () { /usr/bin/rename 's/\d+/sprintf("%05d",$&)/e' -- $@ } Which would change a file "foo-1.txt" to "foo-00001.txt"

Set OS X X11 to use installed Mathematica fonts

a function to find the fastest DNS server

http://public-dns.info gives a list of online dns servers. you need to change the country in url (br in this url) with your country code. this command need some time to ping all IP in list.

quickly backup or copy a file with bash

This inserts timestamp instead of .bak extension.

Detect illegal access to kernel space, potentially useful for Meltdown detection

Based on capsule8 agent examples, not rigorously tested

Super Speedy Hexadecimal or Octal Calculations and Conversions to Decimal.

^Hexadecimal Ten minus Octal Ten is Eight(in Decimal). $ echo "$(( 0xaf )) = $(( 0257 ))" ^Hexadecimal AF and Octal 257 are both Decimal 175.

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Commands using awk (1,418)

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