Commands by Zulu

Commands by Zulu (14)

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Include a remote file (in vim)

Like vim scp://yourhost//your/file but in vim cmds.
This is sample output - yours may be different.
1

:r scp://yourhost//your/file

Zulu · 2013-09-16 08:09:53 9
Purge configuration file of all desinstalled package

From: http://www.debian-administration.org/users/fsateler/weblog/4
This is sample output - yours may be different.
3

dpkg --list | grep '^rc\b' | awk '{ print $2 }' | xargs sudo dpkg -P

Zulu · 2013-03-15 23:15:35 7
strace alternative for Mac OS X

Usefull tool for debug process. Show Sample Output
This is sample output - yours may be different.
```
	PID/THRD  RELATIVE  ELAPSD    CPU SYSCALL(args) 		 = return
18831/0x151a01:   7205192     331      4 read(0x4, "a\0", 0x4000)		 = 1 0
18831/0x151a01:   7205215      14      4 select(0x7, 0x100115850, 0x100118FC0, 0x0, 0x0)		 = 1 0
```
0

dtruss [ -p <pid> | -n <pname> ]

Zulu · 2013-02-22 11:09:55 6
Paste what you previously wrote in INSERT MODE

Paste what you previously wrote in INSERT MODE, for example: 1. Write 'foo' in INSERT MODE 2. Return to NORMAL MODE 3. Press "." and it will paste 'foo'
This is sample output - yours may be different.
-3

. (in NORMAL MODE)

Zulu · 2013-01-08 18:32:57 5
Increment next number in vim
This is sample output - yours may be different.
0

CTRL + A ( in normal mode )

Zulu · 2012-09-28 08:52:56 6
Cut/Copy brackets or parentheses on vim (in normal mode)

We have for example : func () { echo FOO echo BAR } Place the cursor under a bracket and press d + %. It will cut everything inside and the brackets. It let : func () You can copy text with y + %
This is sample output - yours may be different.
1

d + %

Zulu · 2012-07-12 01:04:40 8
List all commands present on system

List all commands present on system by folder. PATH contains all command folder separated by ':'. With ${PATH//:/ }, we change ':' in space and create a list of folder for ls command. Show Sample Output
This is sample output - yours may be different.
```
/bin:
bash*     bzip2*         chgrp*  cp*    df*    egrep*  grep*    gzip*       ln*     

/sbin:
crunchd*  dynamic_pager*  fsck_hfs*    fstyp*      halt@      ip6fw*  launchd*

...
```
9

ls ${PATH//:/ }

Zulu · 2012-04-26 19:45:52 10
Launch command in backgroup or not

If $INBACK is set, command will launch in foreground and inverse. Very useful in script ! We could apply the inverse comportement like that : eval command ${INBACK:+&}
This is sample output - yours may be different.
-1

eval <command> ${INBACK:-&}

Zulu · 2012-04-05 03:50:57 4
Quickly re-launch your script (python for example)

Very useful for test a script. After launch this command, you only have to press ENTER for launch your script again. I work with screen and tape ENTER instead of '!!'+ENTER If you break your script with CTRL-C, it will wait for press ENTER and will re-launch You can write like it : while read -p "Press ENTER" ; do python ; done
This is sample output - yours may be different.
-2

while read ; do python <script> ; done

Zulu · 2012-02-23 22:29:09 14
Change time format in log, UNIX Timestamp to Human readable

It remove the square bracket and convert UNIX time to human readable time for all line of a stream (or file). Show Sample Output
This is sample output - yours may be different.
```
Input :
[1325199600] CURRENT SERVICE STATE: HOST01;Loopback;OK;HARD;1;Loopback0:UP:1 UP: OK
[1325199600] CURRENT SERVICE STATE: HOST01;Uptime Routers SFR;OK;HARD;1;Information only: 114 days

Ouput :
12/30/11 00:00:00 CURRENT SERVICE STATE: HOST01;Loopback;OK;HARD;1;Loopback0:UP:1 UP: OK
12/30/11 00:00:00 CURRENT SERVICE STATE: HOST01;Uptime Routers SFR;OK;HARD;1;Information only: 114 days
```
0

sed -r 's/(\[|])//g' | awk ' { $1=strftime("%D %T",$1); print }'

Zulu · 2012-02-03 13:07:37 5
Remove superfluous from conf file

Use it with cat and '|' for know what is used in a conf file. For example cat /etc/squid/squid.conf | sed -re '/^#/d ; s/#.*$// ; /^\s$/d' : Show you what you use in your file conf. It removes all comments and empty lines. Empty lines are lines with nothing, a tab, or a space.
This is sample output - yours may be different.
-1

sed -re '/^#/d ; s/#.*$// ; /^\s*$/d'

Zulu · 2012-02-02 18:12:52 5
Remove a range of lines from a file

Delete a range of line
This is sample output - yours may be different.
19

sed -i <file> -re '<start>,<end>d'

Zulu · 2012-02-02 17:59:18 29
Create a Bash command server - You can send it scripts or commands to execute

Allow to launch nc like a daemon, in background until you still stop it. (like this command: http://www.commandlinefu.com/commands/view/9978 ) For send script or commands from the client to the server, use nc too, like that : cat script.sh | nc server 1025 echo "service openvpn restart" | nc server 1025 The loop's inside doesn't do anything, but we can add echo -e "\nCommand received\n" . Show Sample Output
This is sample output - yours may be different.
```
$$ (commande PID)
```
-8

while ( nc -l 1025 | bash &> : ) ; do : ; done &

Zulu · 2012-01-08 03:31:58 9
Daemonize nc - Transmit a file like a http server

Allow to launch nc like a daemon, in background until you still stop it. You can stop it with kill %1 (jobs method) or kill PID. The -k option can force nc to listen another connection, but if you use redirection, it will work only one time. The loop's inside doesn't do anything, but we can imagine to send a message to screen when a connection is established Show Sample Output
This is sample output - yours may be different.
```
[$$] # Number of PID
```
13

while ( nc -l 80 < /file.htm > : ) ; do : ; done &

Zulu · 2012-01-02 02:17:25 9

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Bypass 1000 Entry limit of Active Directory with ldapsearch

That command bypass the entry limit specifing page results size, when the search arrive to the limit ldapsearch magically reiterate it from the last entry.

Delete recursively only empty folders on present dir

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"

list block devices

Shows all block devices in a tree with descruptions of what they are.

Watch active calls on an Asterisk PBX

Only the number of calls nothing else.

FInd the 10 biggest files taking up disk space

Often you need to find the files that are taking up the most disk space in order to free up space asap. This script can be run on the enitre filesystem as root or on a home directory to find the largest files.

floating point operations in shell scripts

using bc is for sissies. dc is much better :-D Polish notation will rule the world...

Search some text from all files inside a directory

Toggle between directories

switch to previous directory or toggle

List your installed Firefox extensions

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Commands by Zulu (14)

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