How to extend a Xen VPS Disk space if no space left in the existing Volume Group? I went through a situation where an LVM based Xen VPS is required to increase the Disk space. We often use lvextend command…
Administrative tools
SSH hardening on cPanel servers
Folks! As SysAdmins we’ll always be vigilant on our server’s security, especially for SSH. SSH brute-force attacks rate are higher now-a-days and it has become more necessary to harden the SSH service on our servers. Here I’ll help you in…
How to Enable/Check TUN/TAP module in VPS(OpenVZ).
The terms TUN and TAP are commonly used in computer networking terminology. These are the virtual-network kernel devices. TUN is the short of network TUNnel and TAP is the short of network tap. The TUN simulates a network layer device and…
How to run FSCK on XEN virtual machine?
I believe you guys are familiar in Xen technology! In this scenario, I’m going to explain how execute file system check (FSCK) on Xen VM (Virtual Machine) which are failed in automatic FSCK check. I had to do this on…
How to unblock an IP address from WHMCS?
WHMCS is one of the world’s leading web hosting billing and automation platform. By using WHMCS, we can manage the billing and all billing related things simply and effectively. Here, CryBit going to explain a trick to remove a banned…
Htop installation (The process monitoring tool) on Linux – RHEL, CentOS, Ubuntu, Fedora
It is similar to the process monitoring command TOP in Linux servers. But in ‘htop’ we have an advantage over normal top command. We can simply interact the ‘htop’ output with mouse. It is very useful for such persons who…
How to list cronjob entries of all users?
How to list all cron entries on a WHM/cPanel based servers? Crontab is the program used to install, remove or list the tables used to drive the cron daemon. Cronjobs are predefined jobs which are running periodically according to the…