sudo apt-get install moon-buggy

An ascii 2D game where you control a mooncar and try to avoid moonhole by jumping (press space )

Allows you to change the value of an environment variable only for the execution of the command in the line. (corrected)

prints a random line

This command is great for dumping your history so that when you're working on a system that is under a shared account, you can keep others from reviewing your history file. I use this when I'm just visiting a system to diagnose a problem, or to make a quick fix.

Change /dev/sda with the Disk or partition you want to back-up

To restore use:

Once again change /dev/sda accordingly

Source: http://www.go2linux.org/linux/2010/09/small-tip-back-disks-clone-hard-disk-773

see http://www.imagemagick.org/Usage/color_mods/#modulate

the maven.test.skip property can be added to other goals too.

Prepends all directory items with "prependtext"

Searching for a String in Multiple Files With Grep

compile and install openvm-tools module in debian lenny

This is useful when you got a reserved IP address like 192.168.0.100 and want to find out what IP address is used to access the Internet. You have to know a server with 'efingerd -n' configured, like www.linuxbanks.cn as above.

Other method to find out this information are for example access www.tell-my-ip.com and grep the output. The finger method have the advantage that it is easy to deploy a service like www.tell-my-ip.com, as you only need to get efingerd installed.

Usefull e.g. in krusader open terminal function

Perfect time for the rarely used sub shell.

Valid JSON is a subset of YAML; no transformation is necessary; however, YAML has many syntax features that are not valid JSON, so you can't do the reverse as easily.

Display the machine "hardware name" 32 or 64 bit.

"x86_64" is shown on 64 bit machines

"i686" is typically shown on 32 bit machines (although, you might also see "i386" or "i586" on older Linuxen).

On other "unix-like" systems, other hardware names will be displayed.

For example, on AIX, "uname -m" gives the "machine sequence number".

For whatever reason, IBM decided that "uname -M" would give the machine type and model.

(ref: http://www.ibm.com/developerworks/aix/library/au-aix-systemid.html )

On Sun Solaris, "uname -m" can be used to determine the chip type and "isainfo -v" will reveal

if the kernel is 64 or 32 bit.

(ref: http://www.ibiblio.org/pub/packages/solaris/sparc/html/32.and.64.bit.packages.html )

A more reliable way to determine "64-bit ness" across different Unix type systems is to compile the following simple C program:

/*

* program bits.c

* purpose Display "32" or "64" according to machine type

* written January 2013

* reference http://www.unix.org/whitepapers/64bit.html

*/

/* hmm, curious that angle-brackets removed by commandlinefu.com data input processing? */

#include "/usr/include/stdio.h"

long lv = 0xFFFFFFFF;

main ( ) {

printf("%2d\n",(lv < 0)?32:64);

}

eeooff

Compile and run thusly: cc -o bits bits.c; ./bits

Writes out the shebang line (#!/bin/bash) to the script.