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Show the headers of an URL from the command line. This will need perl, lwp installed on the system. lwp-request…

Don’t show the untracked files in git status git status | perl -pe “exit if(/Untracked files\:/)”

Command to create an Alarm in Linux echo ‘xmessage “Hello”‘|at 19:00

Some command to set, view and remove cron jobs crontab -e #Edit Crons crontab -l #List all crons crontab -r…

Use this command to install a ruby gem in Linux – you must be connected to the net sudo gem…

Compress all PHP output by adding this line to .htaccess file php_value output_handler ob_gzhandler

Prints all the arguments of the function. This function uses console.log if firebug is available – else, uses alert. function…

Creating Chainable interfaces in javascript… (function() { function _init() { return this; } _init.prototype = { “myFunction”: function() { return…

This is how you create a permanent alias is fish… alias x=’exit’ save_function x

Create the MySQL format date(YYYY-MM-DD) using the date command date +%Y-%m-%d