Commands using grep sorted by votes

Commands using grep (1,935)

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command line fu roulette, without all the excessive parsing
This is sample output - yours may be different.
-2

function fur () { curl -sL 'http://www.commandlinefu.com/commands/random/plaintext' | grep -v "^# commandlinefu" }

gml · 2011-02-26 11:34:54 35
Randomize GNU grep's color

Randomize GNU grep's colors 31-36 excluding black and white.
This is sample output - yours may be different.
-2

cgrep() { GREP_COLOR="1;3$((RANDOM%6+1))" grep --color=always "$@" }

derekschrock · 2011-03-04 18:45:58 9
Toggle the Touchpad on or off

then xinput set-prop 13 "Device Enabled" 0 how to disable touchpad, and xinput set-prop 13 "Device Enabled" 1 how to enable again "intelligenti pauca" Show Sample Output
This is sample output - yours may be different.
```
&#9116;   &#8627; SynPS/2 Synaptics TouchPad              	id=13	[slave  pointer  (2)]
```
-2

xinput list | grep -i touchpad

0disse0 · 2011-03-20 14:22:14 4
see who is on this machine
This is sample output - yours may be different.
-2

who;ps aux|grep ssh

wynemo · 2011-04-01 06:32:28 3
List your MACs address

Linux specific, requires iproute2 (but most distros have that by default now)
This is sample output - yours may be different.
-2

ip addr show eth0 | grep ether | awk '{print $2}'

ryanc · 2011-05-01 19:54:46 4
Get the rough (german) time from Twitter by @zurvollenstunde

Calc the rough time from Twitter. Now with leading Zeroes. Show Sample Output
This is sample output - yours may be different.
```
20:11
```
-2

printf "%02d:%02d\n" $(curl -s "http://search.twitter.com/search?from=zurvollenstunde&rpp=1" | grep -E '(Es ist jetzt|ago)' | sed 's/<[^>]*>//g;s/[^[:digit:]]//g' | xargs )

torrid · 2011-06-19 18:16:00 3
view user friends
This is sample output - yours may be different.
-2

lynx -useragent=Opera -dump 'http://www.facebook.com/ajax/typeahead_friends.php?u=4&__a=1' |gawk -F'\"t\":\"' -v RS='\",' 'RT{print $NF}' |grep -v '\"n\":\"' |cut -d, -f2

cancerianeyes · 2011-06-24 03:54:14 4
Get pid of running Apache Tomcat process
This is sample output - yours may be different.
-2

ps -eo pid,args | grep -v grep | grep catalina | awk '{print $1}'

evandrix · 2011-06-27 14:29:49 3
Look for jQuery version script include in files *asp*$, *htm*$ ie. not *.aspx.cs
This is sample output - yours may be different.
-2

find . $ -name "*.as[pc]x" -o -name "*.htm*" $ -exec grep -Hi "jquery-1" {} +

evandrix · 2011-07-14 14:28:55 5
Generate an XKCD #936 style 4 word password

The first grep rejects capitalised words since the dict has proper nouns in it that you mightn't want to use. The second grep rejects words with ending in apostrophe s, and the third forces the words to be at least 15 characters long. Show Sample Output
This is sample output - yours may be different.
```
counterproductive unreasonableness multimillionaires extemporaneously
```
-2

cat /usr/share/dict/words | grep -P ^[a-z].* | grep -v "'s$" | grep -Pv ^.\{1,15\}$ | shuf -n4 | tr '\n' ' ' | sed 's/$/\n/'

bugmenot · 2011-08-15 01:03:48 6
Grep with one result at a time

Not perfect but working (at least on the project i wrote it ;) ) Specify what you want search in var search, then it grep the folder and show one result at a time. Press enter and then it will show the next result. It can work bad on result in the firsts lines, and it can be improved to allow to come back. But in my case (a large project, i was checking if a value wasn't used withouth is corresponding const and the value is "1000" so there was a lot of result ...) it was perfect ;)
This is sample output - yours may be different.
-2

search="whatyouwant";data=$(grep "$search" * -R --exclude-dir=.svn -B2 -A2);for((i=$(echo "$data" | wc -l);$i>0;i=$(($i-6)) )); do clear;echo "$data"| tail -n $i | head -n 5; read;done

Juluan · 2011-08-29 18:14:16 4
Find/Replace in a bunch of files and keep a log of the changes

This is a more concise answer to http://blog.commandlinekungfu.com/2011/09/episode-158-old-switcheroo.html in my opinion.
This is sample output - yours may be different.
-2

find . -type f | xargs grep -n "Old Text" | tee filesChanged.txt | sed 's/:.*$//' | xargs sed -i 's/Old Text/New Text/g

moogmusic · 2011-09-06 10:28:36 3
Get the latest version of phpMyAdmin

This is to get the latest version of phpMyAdmin to support scripts to download the latest version of the software if they want to automatically update. Show Sample Output
This is sample output - yours may be different.
```
3.4.4-all-languages
```
-2

wget http://tools.web4host.net/versions.tmp --quiet -O - | grep PHPMYADMIN | sed 's/PHPMYADMIN=//' | cat

wr8cr8 · 2011-09-22 04:11:44 3
Monitoring a port connections

shell loop to scan netstat output avoiding loolback aliases (local/remote swap for local connections) Show Sample Output
This is sample output - yours may be different.
```
tcp6       0      0 127.0.0.1:36089         127.0.0.1:53991         ESTABLISHED
tcp6       0      0 127.0.0.1:36089         127.0.0.1:59053         ESTABLISHED
```
-2

while true ; do sleep 1 ; clear ; (netstat -tn | grep -P ':36089\s+\d') ; done

hute37 · 2011-09-28 11:39:43 5
check open ports (both ipv4 and ipv6)

This option is much faster, as it checks only network nodes. Show Sample Output
This is sample output - yours may be different.
```
apache2   14485 www-data    8u  IPv4 186095222      0t0  TCP *:443 (LISTEN)
apache2   14770 www-data    4u  IPv4 186095213      0t0  TCP *:80 (LISTEN)
```
-2

lsof -Pi | grep LISTEN

5partan · 2011-10-03 12:50:18 3
list current ssh clients
This is sample output - yours may be different.
-2

netstat -atn | grep :22 | grep ESTABLISHED | awk '{print $4}' | sed 's/:22//'

agambier · 2011-11-09 10:51:55 4
Make alert if host is 'dead' or not reachable

Every 20 minutes ping host with IP address 192.168.0.14. If it's not 'alive' or not reachable, then display something eye-catching (here xeyes) on the desktop. Hint for newbies: edit crontab with crontab -e
This is sample output - yours may be different.
-2

10,30,50 * * * * ping -q -c1 -w3 192.168.0.14 | grep '1 received' - || env DISPLAY=:0 xeyes

knoppix5 · 2012-02-06 09:40:11 3
kill defunct processes by killing their parents

defunct processes (zombies) usually have to be killed by killing their parent processes. this command retrieves such zombies and their immediate parents and kills all of the matching processes.
This is sample output - yours may be different.
-2

ps afx | grep defunct -B 1 | grep -Eo "[0-9]{3,}" | xargs kill -9

pholz · 2012-04-27 16:16:34 3
Get the date for the last Saturday of a given month

This is a little trickier than finding the last Sunday, because you know the last Sunday is in the first position of the last line. The trick is to use the NF less than or equal to 7 so it picks up all the lines then grep out any empty lines. Show Sample Output
This is sample output - yours may be different.
```
28
```
-2

cal 04 2012 | awk 'NF <= 7 { print $7 }' | grep -v "^$" | tail -1

javidjamae · 2012-05-03 16:57:45 764
grep files by date and delete

executed on SLES 11.2
This is sample output - yours may be different.
-2

ls -ltr |grep 'May 12'|awk '{print $9;}'|xargs rm -v

harpo · 2012-06-04 12:31:41 3
Get a list of all browsable Samba shares on the target server.
This is sample output - yours may be different.
-2

smbclient -N -gL \\SambaServer 2>&1 | grep -e "Disk|" | cut -d'|' -f2

dynaguy · 2012-07-07 04:45:06 3
Get your current Public IP
This is sample output - yours may be different.
-2

curl -s http://checkrealip.com/ | grep "Current IP Address" | cut -d ' ' -f 4

kjhank · 2012-07-17 23:17:34 3
Get connections from a SSH tunnel

This obtains a list of open connections that a user is connected to if he/she is using a SSH tunnel
This is sample output - yours may be different.
-2

netstat -t -p --extend | grep USERNAME

wr8cr8 · 2012-08-07 02:25:54 6
finds all files that contain "some string"
This is sample output - yours may be different.
-2

find . -type f -exec grep -l "some string" {} \;

dckt · 2012-11-15 10:14:21 4
Get the /dev/disk/by-id fragment for a physical drive

This was tested on Ubuntu 12.04 (Precise) LTS Server. It returns the name of the symlink within /dev/disk/by-id for the physical drive you specify. Change /dev/sda to the one you want, and replace ata- with scsi- or the appropriate type for your drive. I used this to pre-configure grub-pc during a non-interactive install because I had to tell it which disk to install grub on, and physical disks don't have a UUID such as that blkid provides.
This is sample output - yours may be different.
-2

ls -l /dev/disk/by-id | egrep ata-.*`hdparm -i /dev/sda | grep SerialNo | sed 's/.*SerialNo=//' | tr -d "\n"`.*sda$ | sed -e 's/.*ata-/ata-/' -e 's|[ ].*||' | tr -d "\n"

wizonesolutions · 2013-01-07 10:20:25 6
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Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Edit the /etc/sudoers config file the right way.

'visudo' is installed by default on most Unix-like systems. If not installed, you can get it from the 'sudo' package. 'visudo' will use the text editor found in your $EDITOR variable, whether it's vi, vim, emacs, nano or gedit. After making changes to the /etc/sudoers file, visudo will check for syntax errors, and notify you of them. This is better than 'vi /etc/sudoers', because of this capability. Rule #1 of system administration- if there is a tool that exists for editing config files, use the tool.

Advanced python tracing

Trace python statement execution and syscalls invoked during that simultaneously

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

for all who don't have the watch command

#Usage: watch timeinsecond "command"

Show current network interface in use

zsh suffix to inform you about long command ending

make, find and a lot of other programs can take a lot of time. And can do not. Supppose you write a long, complicated command and wonder if it will be done in 3 seconds or 20 minutes. Just add "R" (without quotes) suffix to it and you can do other things: zsh will inform you when you can see the results. You can replace zenity with other X Window dialogs program.

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" }

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Apply fade effect to a audio

fade [type] fade-in-length [stop-time [fade-out-length]] Apply a fade effect to the beginning, end, or both of the audio. An optional type can be specified to select the shape of the fade curve: q for quarter of a sine wave, h for half a sine wave, t for linear (`triangular') slope, l for logarithmic, and p for inverted parabola. The default is logarithmic. A fade-in starts from the first sample and ramps the signal level from 0 to full volume over fade-in-length sec? onds. Specify 0 seconds if no fade-in is wanted. For fade-outs, the audio will be truncated at stop-time and the signal level will be ramped from full volume down to 0 starting at fade-out-length seconds before the stop-time. If fade-out-length is not specified, it defaults to the same value as fade-in-length. No fade-out is performed if stop-time is not specified. If the file length can be determined from the input file header and length-changing effects are not in effect, then 0 may be specified for stop-time to indicate the usual case of a fade-out that ends at the end of the input audio stream. All times can be specified in either periods of time or sample counts. To specify time periods use the format hh:mm:ss.frac format. To specify using sample counts, specify the number of samples and append the letter `s' to the sample count (for example `8000s').

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Commands using grep (1,935)

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