How to Set Default Entry in Grub2 and Grub

Posted on

Linux booting is usually controlled by Grub or the new Grub2. Setting the default booting entry is a frequent operations. Here, we introduce how to set the default entry in Grub2 and Grub. Setting the default booting entry in grub2 Note1: With some version of grub2, the grub2-set-default method and the script below may not
Read more

How to Format (Erase) DVD+RW / DVD-RW Disks in Linux

Posted on

This post introduces how to erase / blank / format a DVM+RW media on Linux in the command line. First, you need to find out the device of the DVD/CD+RW drive on your Linux box. For example, on my box with Linux 3.3.4 kernel, my DVD/CD+RW drive is /dev/sr0. You can also see what the
Read more

Online Tutorials for Linux Beginners

Posted on

This post compiles a list of tutorials on the Internet for Linux beginners. Linux beginners usually get headache from the “seemed” complexity of the Linux operation system. But once they get into the gate and get familiar with Linux, they will love it. UNIX Tutorial for Beginners “A beginners guide to the Unix and Linux
Read more

Vim as KMail’s External Editor

Posted on

Vim is my favourite text editor and I also prefer to use Vim to compose Email. I ever used Vim as Thunderbird’s External editor with the help of plugin. I started to use KMail as my email client on KDE and I find it is not hard to configure KMail to use Vim as email
Read more

How to SSH to Linux Hosts for Beginners

Posted on

This is a simple tutorial for beginners to SSH to a Linux host. This is quite easy with the easy-to-use software freely available but the beginners need a tutorials to start with. Hence, I write this tutorial about how to ssh to a Linux host. This tutorial is for users on Windows. 1. Download a
Read more

Extending a LVM Volume Group

Posted on

We introduced how to create a LVM group with two hard disk partitions, which the LVM group can be used for [[setting-up-lvm-backed-xen-domu|installing LVM backed Xen DomUs]]. The LVM volume can have large capacity from several hard disks. However, we may use all the disk space after some time and we may need to extend the
Read more

How to Change Hostname of Fedora Linux

Posted on

Different Linux distros have different method to set the hostname. On Fedora Linux, it is quite simple. On newer Fedora releases At least from Fedora 19 (sorry, no sure the exact earliest version): You need to edit the file /etc/hostname which just contains the hostname. On older Fedora releases Sorry, I do not know the
Read more

Installing ns-2 and ns-3 on Fedora Linux

Posted on

ns is a discrete-event network simulator targeted primarily for research and educational use. There are two version of ns, ns-2 and ns-3, which are quite different with each other in the implementation and method to use them. In this post, we introduce how to install ns-2 and ns-3 on Fedora Linux 15. Install ns-2.34 on
Read more

How to Set Up and Configure NFS Server and Clients

Posted on

NFS is widely deployed and used even after more than twenty year. NFS is easy to set up and easy to use. This introduces how to set up the NFS server and clients. We use the Fedora system as the example. The tutorial here is for RHEL/CentOS/Fedora and derived Linux OSes. Set up an NFS
Read more

How to Upgrade Fedora to Newer Version with Yum

Posted on

The latest tools for upgrading Fedora is FedUp, please check How to upgrade Fedora 19 to Fedora 20 through the network. Please consider PreUpgrade for upgrading Fedora. This is the recommended method. This post makes a list of actions should be done to upgrade Fedora using yum. Please note that this is for experienced users
Read more

Howto for New Git Users

Posted on

This post is a tutorial for new users to set up git and clone and use the first repository. This post introduces how to start using git for new users. This post does not introduce details of how to use git commands. Please refer to the git manual or other tutorials for how to commit,
Read more

How to Take Screenshots in MPlayer

Posted on

Taking screenshots in mplayer is simple. mplayer can also take continuous snapshots. Enable screenshot filter When we want to take screenshots when playing video, first we need to set the “-vf screenshot” option: $ mplayer -vf screenshot video.file If we want to enable the screenshot filter by default, we may put the option by adding
Read more

pkill and pgrep: Process Management Commands

Posted on

This is a introduction to *nix’s process management tools: pkill and pgrep. As this site’s domain name was pkill.info, a introduction to pkill should exist here. NAME pgrep, pkill – look up or signal processes based on name and other attributes SYNOPSIS pgrep [-flvx] [-d delimiter] [-n|-o] [-P ppid,…] [-g pgrp,…] [-s sid,…] [-u euid,…]
Read more

Linux Cluster Solutions

Posted on

Solutions to Linux cluster construction and management such as unified account management, NFS home directory, network configurations are summarised in this post. The post is keeping updating while new solutions is added to this site. ===Account and storage management=== [[unified-linux-login-and-home-directory-using-openldap-and-nfsautomount|Unified Linux Login and Home Directory Using OpenLDAP and NFS/automount]] [[backup-linux-home-directory-using-rsync|Backup Linux Home Directory Using rsync]]
Read more

Two Gnome Easter Eggs: “free the fish” and “gegls from outer space”

Posted on

There are funny Gnome easter eggs. One is “free the fish”, and another one is “gegls from outer space”. “free the fish” in Gnome 2 Press Alt+F2 to open “Run Application” dialog Enter “free the fish” Hit Enter “geglx from outer space” in Gnome 2 Press Alt+F2 to open “Run Application” dialog Enter “gegls from
Read more

How to Create Fedora Live USB Media

Posted on

How to create a Fedora live USB media is introduced in this post. We can boot to Fedora operating system environment through a live USB system in the USB flash media on a USB-bootable computer without writing the computer’s hard disk. We can also install Fedora operating system from the live system environment. Remember to
Read more

Installing Specific Old Versions of Packages in Yum

Posted on

We may need to install some old packages such as the kernel in our Linux box. Let’s use installing a older version of Linux kernel in Fedora as the example to introduce how to install old packages from the repository using yum. By now, suppose we have install kernel-2.6.32.16-143 in the Linux box and we
Read more

Making dnf/yum Not Update Certain Packages

Posted on

We may not want to update some packages such the kernel on a stable server while updating the system. If we run “dnf update” or “yum update”, we may get suggested by dnf/yum to install all the packages with updates. In this post, how to make dnf/yum not update certain packages such the kernel when
Read more