Linux System Administration

For those pursuing a Linux career, is Linux certification a must have or an indication that you lack the real world experience that employers demand?

In the ever fast-paced and dynamic context of information technology, IT professionals need to be on their toes, constantly staying abreast of changes in the technology platforms on which they work. Operating systems are refined and improved in newer versions of technology, mandating systems administrators to constantly be on a learning curve to keep up with the changes.


Download YouTube videos using Linux command clive Sometimes you just want to download YouTube videos and watch them offline or your internet connection speed is not as fast as you would like it to be and constant buffering make your watching experience painful. One way to solve both problems is to use clive Linux command.

First locate a video you want to download from YouTube so you will end up with URL as displayed by your browser. Download YouTube video with clive:

$ clive paste-your-youtube-URL-of-video-to-dowload

Video will be downloaded into your current working directory.

yum - basics

yum – Red Hat tool for RPM package management used to download, install update, erase or list info about system packages

/etc/yum.repos.d/ -> list of configured repositories (web or ftp sites) that will be searched to download and install RPM packages

To view which repositories you have enabled:

yum repolist enabled
repo id -> repo name -> status
InstallMedia -> Fedora 8 -> enabled
fedora -> Fedora 8 – x86_64 -> enabled
updates -> Fedora 8 – x86_64 – Updates -> enabled

Working with yum:

yum install <package_name> -> will search, download and install requested package (e.g.: yum install gcc)

yum update -> will search for available updates and install them to your system

yum check-update -> will look for available updates for your system

yum upgrade -> similar to yum update, but tries to upgrade all your obsolete packages

yum remove (or erase) <packge_name> -> will remove previously installed package and its dependencies (e.g.: yum remove gcc)

yum search <package_name> -> search for package descriptions

yum clean packages -> cleans yum cache in /var/cache/yum/…

yum info <package_name> -> displays info about requested package (similar to rpm -qi) (e.g.: yum info gcc)

For complete options see man page

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