RedHat

Linux Partitioning & Logical Volume Manager (LVM)

Linux, Disks and Partitions

RHEL/CentOS 7 Has A New Initialisation Daemon

The init daemon is the initialisation daemon first implemented in System V UNIX systems and has been around for over 40 years!

RedHat’s RHEL 7 and CentOS 7 introduces a replacement for init called systemd.

Startup & Run Levels

RHEL 6 (and CentOS 6) supported SysV init and Upstart with start and kill scripts created as links to scripts in /etc/rc.d/init.d scripts in the appropriate run level directory e.g. /etc/rc2.d.

So How Old is Unix?

And how old is Windows (Server version)? 23 years old.

UNIX is twice the age of Microsoft Windows (Server version)!