A collection of system administration hints and tips, tricks and articles for the Linux operating system in all its variants.

Latest posts

RPM cheat sheet

RPM is a command line package management utility used for installing, uninstalling, updating, querying and verifying software packages.

Installing PHP GeoIP on Ubuntu

A simple article providing the steps necessary to get GeoIP working with PHP on Ubuntu systems.

LVM Logical Volumes

The use of logical volumes is similar to the use of partitions and is accomplished with the same standard commands (mkfs, mount, fsck, df, ...)

LVM Volume Groups

A volume group (vg) is an abstraction layer between block devices and logical volumes. The commands used to manage a volume group start with vg

LVM Physical Volumes

A physical volume (pv) is any block device (a disk, a partition, a RAID device, an iSCSI device, etc.)

Private and public key pairs for SSH

SSH has a key management capacity and related agents.When configured with public key authentication, your key proves your identity to remote SSH hosts

SSH configuration and security best practices

Here is a list of processes and configurations that you can use to tighten and enhance SSH security with regard to remote host access