Commands by Juluan

Commands by Juluan (10)

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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 5
Install and run when a command is not found

Work only with bash and apt-file installed. When it found an unknow command, it will search for a file named "scribus" (in my example), in a folder named bin and then install the corresponding package. After installation, it will run the command. Usefull juste after reinstalling linux and missing lot of package. Show Sample Output
This is sample output - yours may be different.
```
juluan@juluan-desktop ~ 21:56:04 [130] $ scribus
Lecture des listes de paquets... Fait
Construction de l'arbre des d?pendances       
Lecture des informations d'?tat... Fait
Les paquets suppl?mentaires suivants seront install?s?: 
  blt python-tk
Paquets sugg?r?s?:
  blt-demo tix python-tk-dbg scribus-template scribus-doc
Les NOUVEAUX paquets suivants seront install?s?:
  blt python-tk scribus
0 mis ? jour, 3 nouvellement install?s, 0 ? enlever et 3 non mis ? jour.
Il est n?cessaire de prendre 11,5Mo dans les archives.
Apr?s cette op?ration, 32,2Mo d'espace disque suppl?mentaires seront utilis?s.
Souhaitez-vous continuer [O/n]??
```
-7

function command_not_found_handle(){ apt-get install $( apt-file search "$1" | grep bin | grep -w "$1" | head -n1 | cut -d ':' -f 1 ) && $* ; }

Juluan · 2011-04-06 19:58:32 9
Report all quota usage

Check disk quota for all user Show Sample Output
This is sample output - yours may be different.
```
Disk quotas for user ****** (uid 1021): 
        Block limit reached on /dev/md/2
Disk quotas for user ****** (uid 1037): 
        Block limit reached on /dev/md/2
```
5

quota -q $(cat /etc/passwd|cut -d ':' -f 1)

Juluan · 2011-03-20 15:35:42 8
Selecting a random file/folder of a folder
This is sample output - yours may be different.
-3

echo Selected $(ls -1 | sort -R | head -n 1)

Juluan · 2011-03-13 22:06:54 4
Reorder file with max 100 file per folder

If you have a folder with thousand of files and want to have many folder with only 100 file per folder, run this. It will create 0/,1/ etc and put 100 file inside each one. But find will return true even if it don't find anything ... Show Sample Output
This is sample output - yours may be different.
```
Nothing but files and folder
```
-1

folder=0;mkdir $folder; while find -maxdepth 1 -type f -exec mv "{}" $folder \; -quit ; do if [ $( ls $folder | wc -l ) -ge 100 ]; then folder=$(( $folder + 1 )); mkdir $folder; fi ; done

Juluan · 2011-02-11 21:28:01 6
Mixing music in bash

Of course, a fifo is required for piloting the fade out of another song, but with a few bash function, we can mix music in bash like : crossfadeIn > mplayerfifo1 & crossfadeOut > mplayerfifo2 loop 0 10 > mplayer fifo1 etc etc
This is sample output - yours may be different.
0

( for((i=0;$i<100;i++))do echo volume $i 1; sleep 0.1s; done; )| mplayer -slave -quiet sample.mp3

Juluan · 2011-01-06 11:22:03 8
Restore user,group and mod of an entire website

I often use it at my work, on an ovh server with root ssh access and often have to change mod after having finished an operation. This command, replace the user, group and mod by the one required by apache to work.
This is sample output - yours may be different.
2

alias restoremod='chgrp users -R .;chmod u=rwX,g=rX,o=rX -R .;chown $(pwd |cut -d / -f 3) -R .'

Juluan · 2010-12-28 11:42:43 18
Find usb device

I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him Show Sample Output
This is sample output - yours may be different.
```
> Bus 002 Device 017: ID 0499:1039 Yamaha Corp.
```
28

diff <(lsusb) <(sleep 3s && lsusb)

Juluan · 2010-12-27 22:46:54 59
rename files according to file with colums of corresponding names

Maybe simpler, but again, don't know how it will work with space in filename.
This is sample output - yours may be different.
9

xargs -n 2 mv < file_with_colums_of_names

Juluan · 2010-12-27 18:06:15 7
List only executables installed by a debian package

Maybe not clean with big package and too long argument. But return every file who can be executed.
This is sample output - yours may be different.
3

find $(dpkg -L iptables) -maxdepth 0 -executable -type f

Juluan · 2010-10-30 15:36:32 11

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Makes you look busy

This makes an alias for a command named 'busy'. The 'busy' command opens a random file in /usr/include to a random line with vim. Drop this in your .bash_aliases and make sure that file is initialized in your .bashrc.

list files recursively by size

Generate random valid mac addresses

Doubt it actually generates valid mac addresses but this version doesn't need any external commands so it runs much faster. Much shorter as well.

List out classes in of all htmls in directory

Lists out all classes used in all *.html files in the currect directory. usefull for checking if you have left out any style definitions, or accidentally given a different name than you intended. ( I have an ugly habit of accidentally substituting camelCase instead of using under_scores: i would name soemthing counterBox instead of counter_box) WARNING: assumes you give classnames in between double quotes, and that you apply only one class per element.

Create a tar archive using xz compression

Compress files or a directory to xz format. XZ has superior and faster compression than bzip2 in most cases. XZ is superior to 7zip format because it can save file permissions and other metadata data.

Insert a line at the top of a text file without sed or awk or bash loops

Yet another way to add a line at the top a of text file with the help of the tac command (reverse cat).

Shows size of dirs and files, hidden or not, sorted.

Enhanced version: fixes sorting by human readable numbers, and filters out non MB or GB entries that have a G or an M in their name.

fast access to any of your favorite directory.

example: -------------------------------------------------------------------------------------------- user@ubuntu:~/workspace/SVN/haystak-repos/trunk/internal/src$ addpi -------------------------------------------------------------------------------------------- Now that directory is in the list of fast access directories. You can switch to it anytime like this: -------------------------------------------------------------------------------------------- user@ubuntu:~$ pi internal` user@ubuntu:~/workspace/SVN/haystak-repos/trunk/internal/src$ -------------------------------------------------------------------------------------------- Please note the backquote ( the symbol that shares its key with ~ in the keyboard ) pi will switch you to that directory. To see the list of all fast access directories you have to say "cat ~/.pi"

List recorded formular fields of Firefox

When you fill a formular with Firefox, you see things you entered in previous formulars with same field names. This command list everything Firefox has registered. Using a "delete from", you can remove anoying Google queries, for example ;-)

know the current running shell (the true)

Return the current shell. It is better than print $SHELL which can sometimes return a false value.

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