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SQLite [http://www.sqlite.org] is a very handy tool, essentially it creates a database in a file. SQLite V3 should be installed automatically with PHP5.
I find SQLite very handy when I want to make standalone code that uses a database, and because it doesn’t require an external application(such as Mysql) it makes it very portable. [...]

GNU Screen is a free terminal multiplexer developed by the GNU Project since at least 1995. It allows a user to access multiple separate terminal sessions inside a single terminal window or remote terminal session. It is useful for dealing with multiple programs from the command line, and for separating programs from the shell that [...]

This is quick tip to fix a problem that has always bugged me – When showing disk usage in a human readable form (KB, MB, GB) for each subdirectory using “du -sh *”, how can you properly sort it into size order.
If you just want the solution here it it…

pre.command {
width:80%;
background-color:#FFF5F5;
border:1px dashed #BB8888;
margin:10px;
padding:10px;
}

alias duf=’du [...]

Learn by example how to scrape web pages using PHP and Xpath.