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All commands

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Terminal - All commands - 10,555 results
nocache <I/O-heavy-command>
2013-05-21 15:15:05
User: michelsberg
Tags: nice cache ionice nocache I/O
1
Up
Down
prevent large files from being cached in memory (backups!)

We all know...

nice -n19

for low CPU priority.

ionice -c3

for low I/O priority.

nocache can be useful in related scenarios, when we operate on very large files just a single time, e.g. a backup job. It advises the kernel that no caching is required for the involved files, so our current file cache is not erased, potentially decreasing performance on other, more typical file I/O, e.g. on a desktop.

http://askubuntu.com/questions/122857

https://github.com/Feh/nocache

http://packages.debian.org/search?keywords=nocache

http://packages.ubuntu.com/search?keywords=nocache (seems to be unavailable in ubuntu...)

Comments (1) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
find -name '*.mp3' -exec mp3info {} -p "%F: %r kbps\n" \; | sort | sed '/320 kbps/d'
2013-05-21 04:46:55
User: infojunkie
Functions: find sed sort
0
Up
Down
List mp3 files with less than 320 kbps bitrate.
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find . -type f -name filename.exe -exec sed -i "s/oldstring/oldstring/g" {} +;
2013-05-20 19:17:10
User: eddieb
Functions: find sed
Tags: sed find regex find text search and replace
0
Up
Down
Recursively search and replace old with new string, inside every instance of filename.ext

This is a slightly modified version of http://www.commandlinefu.com/commands/view/4283/recursive-search-and-replace-old-with-new-string-inside-files (which did not work due to incorrect syntax) with the added option to sed inside only files named filename.ext

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url=http://mirrors.mageia.org/api/mageia.3.i586.list; wget -q ${url} -O - | grep rsync:
2013-05-20 16:19:05
User: mpb
Functions: grep wget
0
Up
Down
Get a list of Mageia Linux mirrors providing rsync connectivity for Mageia 3 release

Need to find a Mageia Linux mirror server providing Mageia 3 via rsync?

Modify the "url=" string for the version you want. This shows i586 which is the 32bit version.

If you want the 64bit version it is:

url=http://mirrors.mageia.org/api/mageia.3.x86_64.list; wget -q ${url} -O - | grep rsync:

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php -S 127.0.0.1 8080
2013-05-19 11:23:17
User: VictorBjelkholm
6
Up
Down
Run the built in PHP-server in current folder

You must have PHP 5.4.0 or later to be able to run the built in server.

This web server is designed for developmental purposes only, and should not be used in production.

URI requests are served from the current working directory where PHP was started, unless the -t option is used to specify an explicit document root. If a URI request does not specify a file, then either index.php or index.html in the given directory are returned. If neither file exists, then a 404 response code is returned.

If a PHP file is given on the command line when the web server is started it is treated as a "router" script. The script is run at the start of each HTTP request. If this script returns FALSE, then the requested resource is returned as-is. Otherwise the script's output is returned to the browser.

Standard MIME types are returned for files with extensions: .css, .gif, .htm, .html, .jpe, .jpeg, .jpg, .js, .png, .svg, and .txt. The .htm and .svg extensions are recognized from PHP 5.4.4 onwards.

More information here: http://php.net/manual/en/features.commandline.webserver.php

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startx &! exit
2013-05-18 21:41:16
User: dash
Tags: X
-2
Up
Down
Avoid killing the X server with CTRL+C on the tty it was started from
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pwgen -Bs 10 1
2013-05-16 10:50:00
User: techie
Tags: Security password sha256 /dev/urandom md5deep
-3
Up
Down
Create a secure password using /dev/urandom and sha256
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until !!; do :; done
2013-05-14 18:08:54
User: unixmonkey21806
15
Up
Down
Retry the previous command until it exits successfully
Comments (3) | Add to favourites | Report as malicious | Submit alternative | Report as a duplicate
vim anything.tar
2013-05-14 08:20:16
User: redy
Functions: vim
Tags: vim tar
-3
Up
Down
Inspect content of a tar file with vim
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vimhtml() { [[ -f "$1" ]] || return 1; vim +'syn on | run! syntax/2html.vim | wq | q' "$1";}
2013-05-12 19:30:51
User: RanyAlbeg
Functions: return vim
2
Up
Down
Use Vim to convert text to HTML.

``vimhtml somefile.txt`` will open vim for the HTML convertion and close it immediately after its done, leaving you with somefile.html which you can later use in your website or whatever.

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mplayer -af volume=10.1:0 $movie
2013-05-11 20:47:50
User: hendry
0
Up
Down
Amplify movie playback

If a movie is too hard to hear, try the above command to make it louder.

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echo lowercaseword | tr '[a-z]' '[A-Z]'
2013-05-11 11:08:37
User: eastwind
Functions: echo tr
-1
Up
Down
convert a string from lower case into uppercase
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cat file.gz.cpt *[a-z] | ccdecrypt -k yoursecretpassword | tar -xzf -
2013-05-10 12:44:12
User: symgryph
Functions: cat tar
0
Up
Down
Put files back together after encrypted with tar and ccrypt
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tar czf - /directory/to/tar | ccrypt -k yourpassword | split -b50m - /final/encrypted.cpt
2013-05-10 12:42:47
User: symgryph
Functions: split tar
0
Up
Down
encrypt, split and get ready for dvd a large file via tar and ccrypt
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mtr <URL>
2013-05-10 09:48:23
User: techie
-9
Up
Down
The awesome ping / traceroute combination

In the sample output I used google.com.

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git-createrepo() { repos_path='/srv/git/'; mkdir $repos_path$1; cd $repos_path$1; git init --bare; echo "Repository location: ssh://$USER@`cat /etc/HOSTNAME``pwd`"; cd -; }
2013-05-09 21:44:24
User: batandwa
Functions: cd echo init mkdir
Tags: git
-3
Up
Down
Create a git repository

Creates a git repository in a predefined location.

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inotifywait -m -r .
2013-05-09 16:14:25
User: hendry
2
Up
Down
Debug how files are being accessed by a process

Instead of looking through `lsof` results, use inotifywait!

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watch 'ls -tr1 | tail -n1 | xargs tail'
2013-05-09 11:37:59
User: batandwa
Functions: tail watch xargs
Tags: tail ls xargs watch
-4
Up
Down
Poll and print end of lates modified file

Watches for file modifications in the current directory and tails the file.

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tac [FILE]
2013-05-09 09:19:51
User: andreasS
Functions: tac
-3
Up
Down
Print file content in reverse order
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ls *.jpg | xargs -n1 -i cp {} /external-hard-drive/directory
2013-05-09 08:33:01
User: techie
Functions: cp ls xargs
Tags: ls xargs
-6
Up
Down
Copy all images to external hard-drive
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vim -R /etc/passwd
2013-05-09 08:28:32
User: techie
Functions: vim
Tags: vim
-5
Up
Down
Open a file using vim in read only (like less)
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vim +143 filename.txt
2013-05-09 08:24:28
User: techie
Functions: vim
Tags: vim
-5
Up
Down
Go to a specified line in a file
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awk '!($0 in array) { array[$0]; print }' temp
2013-05-09 08:23:30
User: techie
Functions: awk
Tags: awk
0
Up
Down
Remove duplicate lines using awk
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sed -n '1!G;h;$p' techie.txt
2013-05-09 08:22:36
User: techie
Functions: sed
Tags: sed
-3
Up
Down
Print file content in reverse order
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find -iname "MyCProgram.c" -exec md5sum {} \;
2013-05-09 08:21:18
User: techie
Functions: find md5sum
-6
Up
Down
Execute commands on files found by the find command
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