Note that this will not work with files with spaces or characters that need to be escaped. Feel free to leave any comments to improve upon this command, and I'll add it in. Thanks! Show Sample Output

This works on some other version of read.

With counter format [001, 002, ..., 999] , nice with pictures or wallpapers collections.

Grep for a named process. Show Sample Output

manda la salida de un comando hacia un servicio de paste y coloca la url de ese paste en el portapapeles

Matrix Screen HPUX

This is /bin/sh compatible.

bash

Suppose you have 11 marbles, 4 of which are red, the rest being blue. The marbles are indistinguishable, apart from colour. How many different ways are there to arrange the marbles in a line? And how many ways are there to arrange them so that no two red marbles are adjacent? There are simple mathematical solutions to these questions, but it's also possible to generate and count all possibilities directly on the command line, using little more than brace expansion, grep and wc! The answer to the question posed above is that there are 330 ways of arranging the marbles in a line, 70 of which have no two red marbles adjacent. See the sample output. To follow the call to marbles 11 4: after c=''; for i in $(seq $1); do c+='{b,r}'; done;, $c equals {b,r}{b,r}{b,r}{b,r}{b,r}{b,r}{b,r}{b,r}{b,r}{b,r}{b,r} After x=$(eval echo $c), and brace expansion, $x equals bbbbbbbbbbb bbbbbbbbbbr ... rrrrrrrrrrb rrrrrrrrrrr, which is all 2^11 = 2048 strings of 11 b's and r's. After p=''; for i in $(seq $2); do p+='b*r'; done;, $p equals b*rb*rb*rb*r Next, after y=$(grep -wo "${p}b*" Finally, grep -vc 'rr' Show Sample Output

This one is a little bit easier for those of us that aren't always root.

if Argument list too long

Generates a password using symbols, alpha, and digits. No repeating chars. Show Sample Output

It clears caches from memory. It works fine on CentOS and Fedora. It will show you how much memory you need, for real.

It will return the absolute location of the called a script. If is in $PATH, it will search it using which. You can combine this function with this other one: http://www.commandlinefu.com/commands/view/9252/readlink-equivalent-using-shell-commands-and-following-all-links, to get a way to know where is the real location of a called script: # Returns the realpath of a called command. whereis_realpath() { local SCRIPT_PATH=$(whereis $1); myreadlink ${SCRIPT_PATH} | sed "s|^\([^/].*\)\$|$(dirname ${SCRIPT_PATH})/\1|"; } Show Sample Output

alternative to tr char '\012' works with sed's that don't accept "\n" allows for multi-char sentinals, while tr(1) only operates on single chars

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

CPU flags: rm --> 16-bit processor (real mode) tm --> 32-bit processor (? mode) lm --> 64-bit processor (long mode)

or which <command> > /dev/null 2>&1 || echo Error! For example, I write which colordiff > /dev/null 2>&1 && alias diff=colordiff in my `~/.bashrc`.

This command is more robust because it handles spaces, newlines and control characters in filenames. It uses printf, not ls, to determine file size.