Commands tagged grep sorted by votes

Commands tagged grep (409)

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Get IPv4 of eth0 for use with scripts
This is sample output - yours may be different.
0

ifconfig eth0 | grep -o "inet [^ ]*" | cut -d: -f2

dooblem · 2010-07-01 20:25:55 3

Fewer keystrokes to search man page of command

Quicker way to search man pages of command for key word Show Sample Output

function mg(){ man ${1} | egrep ${2} | more; }

quincymd · 2010-07-01 21:14:24 7

Recursive grep of all c++ source under the current directory

Gnu grep allows to restrict the search to files only matching a given pattern. It also allows to exclude files.
This is sample output - yours may be different.
0

grep -R --include=*.cpp --include=*.h --exclude=*.inl.h "string" .

sweinst · 2010-07-14 16:32:28 5
list all file extensions in a directory

If we want files with more than one extension, like .tar.gz, only appear the latest, .gz: ls -Xp /path/to/dir | grep -Eo "\.[^./]+$" | uniq Show Sample Output
This is sample output - yours may be different.
```
.tar.gz
.py
.pyc
```
0

ls -Xp /path/to/dir | grep -Eo "\.[^/]+$" | uniq

karpoke · 2010-08-12 16:32:54 6
remove script from infected html files

recursive find and replace. important stuff are grep -Z and zargs -0 which add zero byte after file name so sed can work even with file names with spaces.
This is sample output - yours may be different.
0

grep -ZlRr -e BAD_SCRIPT_LINE * |xargs -0 sed -i 's/BAD_SCRIPT_LINE//g'

homoludens · 2010-08-30 22:12:57 5
count how many cat processes are running
This is sample output - yours may be different.
0

pgrep -c cat

ioggstream · 2010-09-24 22:42:12 3
GREP a PDF file.
This is sample output - yours may be different.
0

grep -i '[^script$]' 1.txt

vinod · 2010-10-20 12:17:04 3

Source multiline grep with pcregrep

grep multiline in Perl regexp syntax with pcregrep Show Sample Output

pcregrep --color -M -N CRLF "owa_pattern\.\w+\W*$[^$]*\)" source.sql

hute37 · 2010-11-11 12:53:40 10

Find which service was used by which port number

I used 110 as the port number in examples for clarity. backslash+lessthan or backslash+b marks 'edge of the word'. Show Sample Output
This is sample output - yours may be different.
```
pop3            110/tcp    # Post Office Protocol - Version 3
pop3            110/udp    # Post Office Protocol - Version 3
```
0

grep '\<110/' /etc/services; grep '\b110/' /etc/services

unefunge · 2010-11-25 08:29:42 4

Recursive source regexp search with pcregrep

range context (-A -B) search, with exclusion of vcs directories Show Sample Output

pcregrep -r --exclude_dir='.svn' --include='.*jsp$' -A 2 -B 2 --color "pHtmlHome" .

hute37 · 2010-12-09 15:26:07 3

List only those files that has all uppercase letters in their names (e.g. README)

Some source package have many 'README' kind of files, among many other regular files/directories. This command could be useful when one wants to list only 'README' kind of files among jungle of other files. (e.g. I came across this situation after downloading source for module-init-tools) Warning: This command would miss a file like => README.1 (or one with spaces in-between) Corrections welcome. Show Sample Output
This is sample output - yours may be different.
```
7FILESTARTWITHNUMBER
AUTHORS
CODING
COPYING
FAQ
INSTALL
MYTEST1
NEWS
NUM2INBETWEEN
README
TODO
```
0

ls | grep '^[A-Z0-9]*$'

b_t · 2010-12-19 21:45:53 4
Check the package is installed or not. There will show the package name which is installed.
This is sample output - yours may be different.
0

apt-show-versions | grep '\bpython\b'

moonsilex · 2011-01-04 23:10:20 2
find files ending in *.log that contain both 'foo' and 'error'
This is sample output - yours may be different.
0

grep -l foo $(grep -l error *.log)

dlebauer · 2011-01-10 20:04:28 3
find files that contain foo, but not bar

same as grep -lL "foo" $(grep -l bar *cl*.log)
This is sample output - yours may be different.
0

grep -l foo *cl*.log | xargs grep -lL bar

dlebauer · 2011-01-10 20:18:30 3
Remove all the files except abc in the directory

Bash method to remove all files but "abc". It would be 'rm *~abc' in Zsh.
This is sample output - yours may be different.
0

rm *[!abc]

Vilemirth · 2011-01-25 19:41:41 4
Find artist and title of a music cd, UPC code given (first result only)

Changed wget to curl and it doesn't create a file anymore. Show Sample Output
This is sample output - yours may be different.
```
Iron Maiden - Killers
```
0

curl http://www.discogs.com/search?q=724349691704 2> /dev/null | grep \/release\/ | head -2 | tail -1 | sed -e 's/^<div>.*>$.*$<\/a><\/div>/\1/'

mrman · 2011-01-30 23:45:50 3
YouTube Convert and Download All User's Videos to MP3s on the fly

yt2mp3(){ for j in `seq 1 301`;do i=`curl -s gdata.youtube.com/feeds/api/users/$1/uploads\?start-index=$j\&max-results=1|grep -o "watch[^&]*"`;ffmpeg -i `wget youtube.com/$i -qO-|grep -o 'url_map"[^,]*'|sed -n '1{s_.*|__;s_\\\__g;p}'` -vn -ab 128k "`youtube-dl -e ${i#*=}`.mp3";done;} squeezed the monster (and nifty ☺) command from 7776 from 531 characters to 284 characters, but I don't see a way to get it down to 255. This is definitely a kludge!
This is sample output - yours may be different.
0

Command in description (Your command is too long - please keep it to less than 255 characters)

__ · 2011-02-03 08:25:42 5
External IP address

Show Sample Output
This is sample output - yours may be different.
```
213.230.126.174
```
0

wget http://cmyip.com -O - -o /dev/null | grep -Po '[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+'

ruslan · 2011-02-28 16:46:14 7

Show a config file without comments

easier to remember Show Sample Output

grep -v ^# /etc/somefile.conf | grep .

kad · 2011-05-17 01:24:08 8

List your interfaces and MAC addresses

Why use grep and awk?
This is sample output - yours may be different.
0

ifconfig | awk '/HWaddr/ { print $1, $5 }'

Wazutiman · 2011-06-02 12:11:08 3
Download 40 top funnyjunk Images to the current directory

If your version of curl does not support the --compressed option, use curl -s http://funnyjunk.com | gunzip instead of curl -s --compressed http://funnyjunk.com
This is sample output - yours may be different.
0

curl -s --compressed http://funnyjunk.com | awk -F'"' '/ '"'"'mainpagetop24h'"'"'/ { print "http://funnyjunk.com"$4 }' | xargs curl -s | grep -o 'ht.*m/pictures/.*\.jpg\|ht.*m/gifs/.*\.gif' | grep "_......_" | uniq | xargs wget

laniner · 2011-07-21 15:57:21 6
Grep across a directory and open matching files in vim (one tab per file)

vim 7 required
This is sample output - yours may be different.
0

vim -p `grep -r PATTERN TARGET_DIR | cut -f1 -d: | sort | uniq | xargs echo -n`

kovagoz · 2011-08-05 16:34:31 4
List only directories, one per line

nothing special Show Sample Output
This is sample output - yours may be different.
```
[root@arch ~]# ls -l | grep ^d | awk '{print $8}'
Desktop
public_html
script
```
0

ls -l | grep ^d | sed 's:.*\ ::g'

bormarek · 2011-08-08 12:36:28 3
Find all PowerPC applications on OS X

No final count, but clean and simple output.
This is sample output - yours may be different.
0

system_profiler SPApplicationsDataType | grep -A3 -B4 "Kind: PowerPC"

TheQL · 2011-08-17 14:53:08 6
OSX Expand URL and Copy to Clipboard

Expand a URL, aka do a head request, and get the URL. Copy this value to clipboard.
This is sample output - yours may be different.
0

function expand_url() { curl -sI $1 | grep Location: | cut -d " " -f 2 | tr -d "\n" | pbcopy }

gt · 2011-08-21 05:30:09 3
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stop windows update

Windows only: stops windows update and the nagging restart window. You need your admin password for this one.

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"

See system users

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

Based on capsule8 agent examples, not rigorously tested

Determine space taken by files of certain type

Just how much space are those zillions of database logs taking up ? How much will you gain on a compression rate of say 80% ? This little line gives you a good start for your calculations.

Getting GnuPG Public Keys From KeyServer

get my GPG-key from pgp.surfnet.nl, key id is 19886493.

Calculate N!

Same as the seq/bc solution but without bc.

Determine space taken by files of certain type

Just how much space are those zillions of database logs taking up ? How much will you gain on a compression rate of say 80% ? This little line gives you a good start for your calculations.

Send youtube video to Kodi

Kodi needs the youtube plugin to be installed.

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Commands tagged grep (409)

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