Commands by kzh

Commands by kzh (9)

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mkdir & cd into it as single command

The biggest advantage of this over the functions is that it is portable.
This is sample output - yours may be different.
60

mkdir /home/foo/doc/bar && cd $_

kzh · 2011-08-12 11:29:19 19
Terrorist threat level text

Using XSLT. Show Sample Output
This is sample output - yours may be different.
```
Terrorist threat level: ELEVATED
```
-3

xmlstarlet sel --net -t -o "Terrorist threat level: " -v //@CONDITION http://is.gd/wacQtQ

kzh · 2011-01-31 04:18:12 7
Root Security

This will tighten up security for your box. The default value for PermitRootLogin sadly is 'yes'.
This is sample output - yours may be different.
-1

s=/etc/ssh/sshd_config;r=PermitRootLogin;cp $s{,.old}&& if grep $r $s;then sed "s/$r yes/$r no/" $s.old > $s; else echo $r no >> $s;fi

kzh · 2011-01-30 23:41:59 12
BackTrack Repos

Add the BackTrack repositories to your Debian based GNU/Linux distribution. Thanks to http://it-john.com/home/technology/linux-technology/add-back-track-4-repo-to-ubuntu/
This is sample output - yours may be different.
4

sudo apt-add-repository 'deb http://archive.offensive-security.com pwnsauce main microverse macroverse restricted universe multiverse' && wget -q http://archive.offensive-security.com/backtrack.gpg -O- | sudo apt-key add -

kzh · 2010-11-16 18:23:48 11
Factorial With Case

Computes factorials. Show Sample Output
This is sample output - yours may be different.
```
$ fac 4
24
$
```
2

fac(){ case $1 in 0|1)echo 1;;[0-9]*)echo $[$1*$(fac $[$1-1])];;*)exit 1;;esac }

kzh · 2010-06-28 19:54:39 4
Fibonacci With Case

Returns the '$1'th Fibonacci number. Show Sample Output
This is sample output - yours may be different.
```
$ fib 2
1
$
```
2

fib(){ case $1 in 0)echo 0;;1)echo 1;;[0-9]*)echo $[$(fib $[$1-2])+$(fib $[$1-1])];;*)exit 1;;esac;}

kzh · 2010-06-28 19:41:44 26
Perl Command Line Interpreter

My Programming Languages professor assigned my class a homework assignment where we had to write a Perl interpreter using Perl. I really like Python's interactive command line interpreter which inspired this Perl script.
This is sample output - yours may be different.
10

perl -e 'while(1){print"> ";eval<>}'

kzh · 2010-02-03 21:48:33 424
Python Challenge Problem 0

This is the answer to the 0th problem from the python challenge < http://www.pythonchallenge.com/ >. Replace sensible-browser with firefox, w3m or whatever. Show Sample Output
This is sample output - yours may be different.
```
http://www.pythonchallenge.com/pc/def/map.html
```
-1

sensible-browser http://www.pythonchallenge.com/pc/def/$(bc <<< 2^38).html

kzh · 2010-02-02 00:53:18 9
OSX command to take badly formatted xml from the clipboard, cleans it up and puts it back into the clipboard.

This command can be used with xclip or xsel for use on a linux box. Show Sample Output
This is sample output - yours may be different.
```
<some>
<xml></xml>
</some>
```
3

pbpaste | tidy -xml -wrap 0 | pbcopy

kzh · 2009-07-20 20:44:14 8

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debian/ubuntu get installed nvidia driver version from terminal

i've been writing a bash script where i needed to query the installed version number of the nvidia driver when it's not loaded. Unfortunately i have not found a easy way of doing this. If i'm a stupid person, please enlighten me of a better way ;)

High resolution video screen recording

$ gorecord foo.mp4 I've tried all of the screen recorders available for Linux and this is easily the best. xvidcap segfaults; VNC is too much hassle. There are alternatives of this command already here that I am just too lazy to reply to. Messing with the frames per second option, -r, 25 seems to be the best. Any lower and the video will look like a flipbook, if it records at all - -r 10 won't - any faster is the same, oddly enough. Edit: CLF doesn't like my long command to add audio, so here it is in the description. $ goaddaudio() ${ $if [ $# != 3 ]; then $ echo 'goaddaudio < audio > < src video > < dst video >' $ return $ fi $ $ f=goaddaudio$RANDOM $ ffmpeg -i "$2" &> $f $ d=$( grep Duration $f | awk '{print $2}' | tr -d ',' ) && $ rm $f && $ ffmpeg -i "$1" -i "$2" -r 25 -ab 192k -ar 44100 -sameq -t $d "$3" $}

Download an Entire website with wget

Convert a bunch of HTML files from ISO-8859-1 to UTF-8 file encoding in a folder and all sub-folders

This is my first attempt at converting all HTML files to UTF-8 file encoding, including all subfolders. Theres probably a much more compact way to do it, but I'm quite proud of it with my windows background ;)

Grab all .flv files from a webpage to the current working directory

I wanted all the 'hidden' .flv files from the http link in the command line; wget seemed appropriate, fed with output from lynx, grep the flv files and the normalised via sed (to remove the numeric bullet). Similar to the 'Grab mp3 files' fu. Replace link with your own, grep arg with something more interesting ;) See here for something along the same lines... http://www.commandlinefu.com/commands/view/1006/grab-mp3-files-from-your-favorite-netcasts-mp3blog-or-sites-that-often-have-good-mp3s Hope you find it useful! Improvements welcome, naturally.

return external ip

Find the top 10 directories containing the highest number of files

It can be used to pinpoint the path(s) where the largest number of files resides when running out of free i-nodes

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"

recursively change file name from uppercase to lowercase (or viceversa)

Example of zsh globing, glob qualifier, and substitution: -Q state that the parameter will contain a glob qualifier. (**/)(*) is recursive (.) is our glob qualifier, with states the match is a file "." The first parameter $1, is then substituted with $2 but with lowercasing '(L)' ... a (U) would of course be from lower to upper.

Convert CSV to JSON

Replace 'csv_file.csv' with your filename.

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Commands by kzh (9)

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