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awk, bash, curl, find, grep, Linux, sed

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Functions

Terminal - All commands - 12,419 results

echo foobar | sed -r 's/(^.|.$)//g'

2011-11-19 16:19:07

User: ebraminio

Functions: echo sed

Tags: bash sed

Up
Down

Remove the first and the latest caracter of a string

Just an other solution :)

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(sed 's/^/x*=/' file ; echo x) | bc

2012-01-03 13:45:25

User: fallen3angel

Functions: echo file sed

Up
Down

Fast way to get the product of every number in a file

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DATE=`date +"%H:%M" --date '-1 min'`; egrep "\ $DATE\:..\ " /var/log/dhcpd.log |awk '/DHCPREQUEST/ {split($3,t,":"); printf("%02d:%02d\n",t[1],t[2]);}' |uniq -c;

2013-03-17 02:23:37

User: jobewan

Functions: awk egrep uniq

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Down

Display count of log entries via the previous minute for graphing purposes. Example given is for DHCPREQUESTS on an ISC dhcp service log.

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hexdump -C file

2013-05-07 20:40:02

User: qistoph

Functions: hexdump

Up
Down

Hex Dump

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(date "+%d-%m-%Y %H:%M:%S";curl -s --interface lo:1 ifconfig.me| xargs -t geoiplookup 2>&1)|sed -e 's/geoiplookup/IP:/g' -e 's/GeoIP Country Edition/Country/g'|tr -s "\n" " "|sed 'a\ '

2013-10-07 15:28:55

User: guerito

Functions: date sed tr xargs

Up
Down

Localize a Public IP on a specific interface

My first command :) I made this command to log public addresses of a virtual interface who connects random VPN servers around the world.

command_line 2>&1 | tee -a output_file

2014-04-05 13:02:30

User: esplinter

Functions: tee

Tags: tee redirect

Up
Down

redirect STDOUT and STDERR to STDOUT and also to a file

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git log --graph --decorate --pretty=oneline --abbrev-commit

2014-07-16 02:07:23

User: nicolasmccurdy

Up
Down

My git log alias

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for f in input/*; do BN=$(basename "$f"); ffmpeg -i "$f" -vn "temp/$BN.flac"...

2015-03-01 02:48:19

User: samcamwilliams

Functions: basename

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Remove excess noise from a set of mp4 videos.

Full command:

for f in input/*; do BN=$(basename "$f"); ffmpeg -i "$f" -vn "temp/$BN.flac"; sox "temp/$BN.flac" "temp/$BN-cleaned.flac" noisered profile 0.3; ffmpeg -i "$f" -vcodec copy -an "temp/$BN-na.mp4"; ffmpeg -i "temp/$BN-na.mp4" -i "temp/$BN-cleaned.flac" "output/$BN"; done

This was over the 255 character limit and I didn't feel like deliberately obfuscating it.

1. Create 'input', 'output' and 'temp' directories.

2. Place the files that you want to remove the hiss/static/general noise from in the input directory.

3. Generate a noise reduction profile with sox using 'sox an_input_file.mp4 -n trim x y noiseprof profile', where x and y indicates a range in seconds that only the sound you want to eliminate is present in.

4. Run the command.

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#!/bin/bash find | grep -P -v "(class)|(zip)|(png)|(gz)|(gif)|(jpeg)|(jpg)" | xargs -I @ grep -H $1 @

2011-10-14 13:28:49

User: kirdie

Functions: find grep xargs

Tags: find grep

-1

Up
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find&grep all in once

calls grep on all non-binary files returned by find on its current working directory

if [[ $EUID -ne 0 ]]; then echo 'Root permissions required! Exiting.'; exit; fi

2011-11-19 23:06:52

User: lordtoran

Functions: echo

Tags: root permissions authentication

-1

Up
Down

Terminate script or shell if not launched as root

This example code is intended to be used as a root permissions check in a script. It makes use of the $EUID (effective user ID) environment variable which is fully su- and sudo-safe.

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cd /System/Library/LaunchDaemons; sudo launchctl load -w com.apple.metadata.mds.plist

2012-05-16 15:42:10

User: evandrix

Functions: cd sudo

-1

Up
Down

Spotlight Server Disabled

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for i in `cat /proc/mounts | awk '{print $2}' | grep ${CDIR} |sort -r` ; do umount $i; done

2013-05-07 23:46:27

User: mordjah

Functions: awk grep sort umount

-1

Up
Down

umount --rbind mount with submounts

set CDIR for it to work right..

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tar -cvf /path/dir.tar /path/dir* --exclude "/path/dir/name" --exclude "/path/dir/opt"

2009-12-15 09:48:41

User: sandeepverma

Functions: tar

-1

Up
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Tar - Compress by excluding folders

get-ipsw(){ curl -s -L http://phobos.apple.com/version | sed -rn "s|[\t ]*<string>(http://appldnld\.apple\.com\.edgesuite\.net/content\.info\.apple\.com/iPhone[0-9]?/[^/]*/$1$2_$3_[A-Z0-9a-z]*_Restore\.ipsw)</string>|\1|p" | uniq; }

2010-06-22 02:34:15

User: matthewbauer

Functions: get sed

Tags: ipod iphone ios ipsw

-1

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Down

Get iPhone OS firmware URL (.ipsw)

Usage:

get-ipsw device-name generation-string firmware-version

For example:

get-ipsw iPod 2,1 4.0

Different generation strings:

iPhone 3G: iPhone 1,2

iPhone 3GS: iPhone 2,1

iPod touch 2G: iPod 2,1

iPod touch 3G: iPod 3,1

This can be used with idevicerestore (I haven't tried it though).

http://github.com/posixninja/idevicerestore

Based on:

http://www.tuaw.com/2010/06/21/ios-4-0-firmware-release-expected-momentarily-quick-terminal-ti/

file <filename>

2011-11-19 23:39:29

User: lordtoran

Functions: file

Tags: file files file format

-1

Up
Down

Get a file's type and metadata

Some shell newbies don't know this very handy file management related command so I decided to include it here.

You need to have the "file" package installed.

ls | xargs -I{} du -sh {}

2013-07-28 04:18:25

User: kenshin54

Functions: du ls xargs

-1

Up
Down

list each file/directory size in a directory

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<CTRL+Z>; fg

2014-04-06 14:21:08

User: kbrotheridge

-1

Up
Down

Push current task to background (paused) and resume it.

Saves opening another console terminal (eg. CTRL+ALT+F[n]) or opening another remote terminal.

Ctrl+Z pauses the current task and pushed it to the background, leaving you with a command prompt for those "Oh crap I forgot to change xyz before I ran that and it'll take forever if I Ctrl+C and start again..." situations. Typing 'fg' (shorthand for foreground, that's how I remember it) will resume the paused task.

if [ "$(ping -q -c1 google.com)" ];then wget -mnd -q http://www.google.com/intl/en_ALL/images/logo.gif ;fi

2010-03-23 04:15:03

User: alf

Functions: wget

Tags: bash Linux ping wget if

-1

Up
Down

Use ping to test if a server is up

Bash scrip to test if a server is up, you can use this before wget'ing a file to make sure a blank one isn't downloaded.

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for i in *.wma; do mplayer -vo null -vc dummy -af resample=44100 -ao pcm:waveheader:file="${i%.wma}.wav" "$i" ; done

2011-01-18 14:41:17

User: schef

-1

Up
Down

Convert wma to wav

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echo $(( $( date +%s ) - $( stat -c %Y * | sort -nr | head -n 1 ) ))

2011-05-12 14:29:45

User: depesz

Functions: date echo head sort stat

Tags: bash awk stat mtime

-1

Up
Down

Show seconds since modified of newest modified file in directory

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alias oports="echo -e "User:\tCommand:\tPort:\n----------------------------" && lsof -i 4 -P -n | awk '/LISTEN/ {print $3, $1, $9}' | sed 's/ [a-z0-9\.\*]*:/ /' | sort -u -k 3 -n | xargs printf '%-10s %-10s %-10s\n'"

2011-08-04 16:39:04

User: rthemocap

Functions: alias

-1

Up
Down

lsof - cleaned up for just open listening ports, the process, and the owner of the process

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mp4box -info video.mp4

2013-01-18 14:43:29

User: alienresident

Tags: ffmpeg

-1

Up
Down

Get video information with ffmpeg

mp4box is great when working with mp4s

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watch -n <seconds> <command>

2009-09-04 15:19:42

User: aonick

Functions: watch

Tags: bash

-1

Up
Down

bash function to check for something every 5 seconds

Every seconds do

wget http://somesite.com/somestream.pls; cvlc somestream.pls&sleep 5; rm somestream.pls*

2011-08-04 19:24:18

User: tomjrace

Functions: rm wget

-1

Up
Down

Play a stream and give back the shell

I wanted to play a song from the shell and get the shell back, I also dont want to store the file if it is not needed.

edit, not sure if I need to mention it... killall vlc to stop it

slow () { [ -n $1 ] && while kill -STOP $1; do sleep 1; kill -CONT $1; sleep 1; done }

2012-05-16 19:16:50

User: makidoko

Functions: kill sleep

Tags: io

-1

Up
Down

Slow down IO heavy process

compare to alternative :

- directly tests the -STOP of the process to continue or stop loop,

- background operator should be set (or not) at the call of the function

For extension i suggest a slowPID() based on kill like above and a slowCMD based on killall.

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