Commands using grep sorted by votes

Commands using grep (1,935)

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Grep for non-empty lines that do not start with # (comments) or <some-char> and does not include <some-char>

Grep for: >> non-empty lines : denoted by -v -e '^$' >> that do not start with # (comments) or : denoted by -v -e '^[#\]' >> and does not include : denoted by -v -e '\' (Note that we use -v only once)
This is sample output - yours may be different.
0

grep -v -e '^$' -e '^[#\[]' -e '\/' some_file

abhikeny · 2015-07-17 21:28:14 26
Grep for pattern & get uniq filenames

Grep for string in all files in a folder, get only the names of the file, making the file list uniq, then assingning all the file names to a variable in awk & printing on STDOUT
This is sample output - yours may be different.
0

grep -nri "pattern_to_search" folder_name/ | awk -F ":" '{print $1}' | uniq | awk 'BEGIN {f=""} {f = f" "$0} END {print f}'

ashish2 · 2015-07-19 01:00:58 11
Continuously show wifi signal strength on a mac

Shows the WiFi signal strength without having to display thousands of lines Show Sample Output
This is sample output - yours may be different.
```
Wifi signal strength: -34
```
0

while i=1; do echo -ne 'Wifi signal strength:' $(/System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resources/airport -I | grep CtlRSSI | awk {'print $2'}) '\r'; sleep 0.5; done

ackgrep · 2015-07-19 11:52:04 9
Get the user with the top number of logins

Get an approximation of who the workstation is assigned to. You can wrap it in su - "$()" if you want to log into a shell as that user. Show Sample Output
This is sample output - yours may be different.
```
frequentuser
```
0

last | grep -i console | grep -iv 'root' | cut -f 1 -d ' ' | sort | uniq -c | sort -nr | awk '{print $2}' | head -1

phyxia · 2015-07-20 18:07:40 10
Export all domains in bind format from AWS Route53
This is sample output - yours may be different.
0

eval `cli53 list |grep Name | sed "s/\.$//g" | awk '{printf("echo %s; cli53 export %s > %s;\n", $2, $2, $2);}'`

cfb · 2015-07-21 14:16:30 10
Docker: Remove all exited docker container
This is sample output - yours may be different.
0

docker ps -a | grep Exit | awk -F " " '{ print $1 }' | xargs docker rm {}

leoman730 · 2015-07-29 16:02:17 12
Find a expression inside any readable archive from the folder I'm and their subfolders
This is sample output - yours may be different.
0

find . -exec grep -H "<expression>" {} \;

Corelio · 2015-08-03 19:55:15 8
Locate a string in any file

When searching for strings in a directory and all sub-directories. -H shows the filename. The find command is great but it has some weird syntax.
This is sample output - yours may be different.
0

find ./ -type f -exec grep -H <string> {} \;

jphelpsclfu · 2015-08-04 03:23:19 9
Rspec: run specs that were created/changed on my branch only
This is sample output - yours may be different.
0

git diff --name-only origin/master.. | grep _spec.rb | xargs rspec

valer · 2015-08-06 10:43:31 9
Docker: Remove all exited docker container
This is sample output - yours may be different.
0

docker ps -a | grep "Exited" | awk '{print $1}' | xargs docker rm

leoman730 · 2015-08-11 16:01:15 14
Print all open regular files sorted by the number of file handles open to each.
This is sample output - yours may be different.
0

lsof -a -d 1-99 -Fn / | grep ^n | cut -b2- | sort | uniq -c | sort -n

sesom42 · 2015-08-18 16:55:49 9
Deletes cpu time consuming plugin-containe triggered by firefox

Some times firefox run a plugin named "plugin-containe". It sometimes take so much cpu that it is impossible to keep browsing. When this happens, one can simply kill the process. If the process does not exist, the command returns an innocuous error message.
This is sample output - yours may be different.
0

kill -9 `top -b -n 1 | grep plugin-containe | awk '{print $1}'`

otaviolb · 2015-09-08 18:14:53 11
printing text between tags
This is sample output - yours may be different.
0

echo or cat something | grep -Po '(?<=text_before).*(?=text_after)'

petteriIII · 2015-09-11 09:19:57 9
Check Twitter followers

See how many people are following you (or anyone) on Twitter. followers cadejscroggins Show Sample Output
This is sample output - yours may be different.
```
264 Followers
```
0

followers() { curl -s https://twitter.com/$1 | grep -o '[0-9,]* Followers'; }

cadejscroggins · 2015-09-19 07:07:36 12
search for a string/word in a file

by default, will output the whole line on which 'word' has been found
This is sample output - yours may be different.
0

grep word file.txt

lolssl · 2015-10-02 16:01:56 10
ps to show child thread PIDs
This is sample output - yours may be different.
0

ls -1 /proc/$(ps ax | grep <Process Name> | head -n 1 | awk '{print $1;}')/task | tail -n +2

happymarmoset · 2015-10-06 07:44:48 10
Extract the URL of the first mp3 out of a podcast xml feed and add it it to current mpd playlist

Quick way to get the URL of the most recent audio file out of a podcast xml feed without any fancy xml parsing tools. Just curl, grep and head
This is sample output - yours may be different.
0

mpc add `curl -s http://link.to/podcast/feed.xml | grep -o 'https*://[^"]*mp3' | head -1`

tbon3r · 2015-10-11 09:17:35 9
grep for all occurences of a (Perl-)regex in the complete, or part of man-database
This is sample output - yours may be different.
0

man -a --regex "byobu" |grep --color=always -i3P 'key[a-z-]*?s' | less -R

VoidDroid · 2015-10-18 10:38:01 10
Get a quote from Pooh

Someone quoted Pooh in an init script. Let's see it! (Probably only works on Debian & friends) Show Sample Output
This is sample output - yours may be different.
```
        # Bother, said Pooh.
```
0

grep -Pooh .*t..r,.* /etc/init.d/*

drewbenn · 2015-10-23 17:35:28 13
find deleted files with open file descriptors(without lsof)
This is sample output - yours may be different.
0

find /proc/*/fd -ls | grep '(deleted)'

Raboo · 2015-10-27 10:44:12 9
Search entire web server for preg_replace /e based php malware.
This is sample output - yours may be different.
0

find / -name \*.php -exec grep -Hn preg_replace {} \;|grep /e|grep POST

UnklAdM · 2015-10-28 16:10:23 10

Search entire server for Q4 2015 obfuscated PHP malware of unknown origin.

If this matches any files on your web server expect to find allot of malware spread throughout your server folders. Seems to target wordpress sites. Be sure to check your themes/theme-name/header.php files manually for various redirect scripting usually in the line right above the close head tag. Good luck! Show Sample Output

find / -name \*.php -exec grep -Hn .1.=.......0.=.......3.=.......2.=.......5.= {} \;

UnklAdM · 2015-10-28 20:58:53 10

Download files linked in a RSS feed

Just added a little url encoding with sed - urls with spaces don't work well - this also works against instead of enclosure and adds a sample to show that you can filter against links at a certain domain Show Sample Output
This is sample output - yours may be different.
```
Reusing existing connection to www.yourfeed.com:80.
HTTP request sent, awaiting response... 200 OK
Length: 176975 (173K) [application/pdf]
Saving to: 'MyFile.pdf'

MyFile.pdf            100%[==================================================================================================================>] 172.83K   488KB/s   in 0.4s   

2015-10-30 15:06:24 (488 KB/s) - 'MyFile.pdf' saved [176975/176975]
```
0

wget -q -O- http://www.yourfeed.com/rss | grep -o "<link[ -~][^>]*" | grep -o "http://www.myfeed.com[ -~][^\"]*" | sed "s: :%20:g" | xargs wget -c

dermidgen · 2015-10-30 22:13:43 24
Find out the Firefox bookmarks that have "string" in their note (aka 'description')

1. First we get the `item_id` for that `comment`. Adapt the -C[N] parameter for your use. 2. Then we show the bookmark's `title` (or `url`). With that in your hand it's a matter of seconds to open Firefox's library and find the bookmark. Handy for eg. forensics or better sanitize of a place.sqlite before sharing it (on the cloud). It sure has room for improvement. Show Sample Output
This is sample output - yours may be different.
```
blablablabla
bleble string    ?-- string looked for
blobloblo|10611  ?-- item_id

Bookmark's title
```
0

sqlite3 -list places.sqlite 'SELECT item_id, content FROM moz_items_annos ;' | grep -A9 "string" ; sqlite3 places.sqlite 'SELECT title FROM moz_bookmarks WHERE .fk = <item_id number> ;'

datruche · 2015-10-31 19:32:52 13
Find + grep
This is sample output - yours may be different.
0

find <dir> -type f -exec grep -i -H <string> {} \;

Plancton · 2015-11-04 17:13:54 10
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happened to find this not bad software to keep my files and folders safe! Even the free trial version has the fantastic functions to protect any private files from being seen by anyone except me. With it I can encrypt, hide or lock anything I want, amazin

I noticed some spammer posted an advertisement here for "not bad" encryption. Unfortunately, their software only runs under Microsoft Windows and fails to work from the commandline. My shell script improves upon those two aspects, with no loss in security, using the exact same "military-grade" encryption technology, which has the ultra-cool codename "ROT-13". For extra security, I recommend running ROT-13 twice.

A simple command to toggle mute with pulseaudio (any sink)

0 can also be replaced by the source name, e.g. alsa_output.pci-0000_00_1b.0.analog-stereo

Update twitter with curl

Same as below, but no quotes are necessary when twitting more than one word

Simple server which listens on a port and prints out received data

Sometimes you need a simple server which listens on a port and prints out received data. Example: Consider you want to know, which data is posted by a homepage to a remote script without analysing the html code! A simple way to do this is to save the page to your computer, substitude all action="address" with action="localhost:portnumber", run 'ncat -l portnumber' and open the edited page with your browser. If you then submit the form, ncat will print out the http-protocol with all the posted data.

Run a command as root, with a delay

$ sleep 1h ; sudo command or $ sudo sleep 1h ; sudo command won't work, because by the time the delay is up, sudo will want your password again.

The scene in the Shining (Stanley Kubrick)

Let's take a rest. How about watch a horror? The Shining http://en.wikipedia.org/wiki/The_Shining_(film)

list all file extensions in a directory

Works on current directory, with built-in sorting.

Hide the name of a process listed in the `ps` output

$ exec -a $NAME $COMMAND $ARGS `your_cmd -erase_all_files` is the real process, but harmless-looking getty appears in the process table. Never actually had a need to do this, but interesting nonetheless... Tested in bash, dash. $ -a $NAME "pass NAME as the zeroth argument to COMMAND", i.e. customise the name of the process (as commonly seen with `ps`)

Create strong, but easy to remember password

Why remember? Generate! Up to 48 chars, works on any unix-like system (NB: BSD use md5 instead of md5sum)

Write comments to your history.

A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.

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Commands using grep (1,935)

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