How to create/remove the disk from the array
Mdadm is the modern tool most Linux distributions use these days to manage software RAID arrays; in the past raidtools was the tool we have used for this. This cheat…
OVH server not booting with centos7.6 kernel
One of our client was facing issue with OVH kernel. After rebooting the server it’s not coming up with normal kernel. I have checked the server using IPMI console and…
Applying Kernel Patch Without Rebooting
As a System Administrator, server uptime has much importance. The servers must be running as long as possible. While keeping this server uptime consistent, a System Administrator should also have…
How to install webmin on centos 6
Webmin is a web-based graphical tool for unix . It is used to manage services like User management, Disk managemet, Network, Iptables ( Firewall ), Cron, Apache, DNS, File sharing and…
How to Install svn server on centos 6
SVN – Apache subversion SVN – Subversion is a versioning and revision control system used by developers to track and keep up earlier versions of their source codes. Update yum…
command to activate VG on LVM?
When you create a volume group, by default, it is activated. Sometimes you may need to activate it manually to make the kernel aware of volume groups. To activate, #…
Limit download rate for yum
yum (RHEL/CentOs/SL/etc) has an option which allows you to limit the download rate/amount of bandwidth used to download packages. Here’s how you do it: Edit the /etc/yum.conf file and add the following line:…
Centos/RHEL not booting. Only shows GRUB _
When you see the following prompt with a blinking cursor instead of your RHEL 5 (Or CentOS/Scientific Linux v5 obviously) server booting, you will have in all likelihood have to…
Execute command via SSH on remote box and output on local machine.
How to execute command via SSH on remote machine and get output on local machine console. ## SYNTAX ssh [user]@[remote host] [command] ## EXAMPLE ssh [email protected] df -h …
How to install VMWare Tools on CentOS/RHEL 6.5
To install VMWare tools using YUM on CentOS/RHEL 6.5, do the following. Note, I’m logged in as the ‘root’ user, but you could execute these commands using ‘sudo’ as well.…