Change I/O Disk Scheduler without Reboot
There are four I/O schedulers for hard disks and block devices: anticipatory, noop, deadline, and CFQ. CFQ is usually the default. To change the I/O scheduler…
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How to Restore Defaults Gnome Desktop Environment
Restore the default GNOME desktop environment: enter runlevel 3 with #init3, log in as root, go to the user's home directory, and remove .gnome* files.
RHCE Red Hat Certified Engineer Linux Study Guide (Certification Press)
RHCE Red Hat Certified Engineer Linux Study Guide provide a hundreds of practice questions and hands-on exercises. The RHCE Red Hat Certified Engineer Linux Study Guide is up to date for Red Hat Enter
Yum, Yellow dog Update, Modified and How to use Yum
Yum, or Yellow dog Update, Modified, manages RPM package installation, removal, and updates, resolving dependencies from configured repositories.
A Practical Guide to Linux Commands, Editors and Shell Programming
A Practical Guide to Linux Commands, Editors, and Shell Programming is the most useful, most comprehensive Linux tutorial and reference you can find. A tutorial on fundamental Linux concepts and techn
Why CPU stats between ps and top Command are Different
The difference between CPU statistics from ps and top is that ps calculates CPU utilization as total CPU time divided by the task's running time, while top displays a percentage of overall CPU time…
How to Set up GRUB to boot from both disks of mirrored RAID
On Linux software RAID 1, GRUB normally boots from the primary disk. Configure it on the secondary disk too so the system can boot if the primary fails.
How to Configure yum Show Availble updates from exclude list
yum normally hides packages listed under exclude in yum.conf, so yum update does not show which newer versions are available for those packages.
What Is a Computer Cluster?
A computer cluster is a group of connected computers that work together as if they were one computer. Each machine connects through a fast local area network. Clusters are generally…