Tag Archives: Linux

Understanding file permissions and ownership on Linux

January 22, 2012 | 1 Comment

The files on a Linux system can have reading permissions, writing permissions, executing (running) permissions or no permissions for the user that owns that files, groups of users or the rest – users who does not own that files and they are not members of any group.Continue reading →

Extract audio from video file

February 20, 2011 | No comments

Since there are so many tools (Minitube, youtube-dl) which allows you to download video files from YouTube or other video sharing sites, let’s go one step further and extract the sound from the downloaded video file to a mp3 file. The FFmpeg tool will do the trick just fineContinue reading →

CLI search and replace in multiple files

March 11, 2010 | No comments

Here is a quick tip about how to find and replace a text in multiple files, from CLI.In this example you have some text files (.txt) with urls like “http://example.com, http://another-example.com…”. What you are trying to do is to replace all “http” references with “https”.Continue reading →

Find all folders with same name in a directory tree and execute commands on them

October 11, 2009 | No comments

In a Linux CLI environment you can use the “find” command to search for files or folder. In this tutorial I will explain how to find folders having the same name in a directory tree and execute commands on them.Continue reading →

Shell script to extract the exchange rates from BNR (Romania)

August 13, 2008 | 2 Comments

Here is a simple script to get the exchange rates.Continue reading →