Lee Young-Won — www.eyoungwon.com

IT pros tend to have strong opinions when debating the value of professional certification – and views become even more polarized when it comes down to a discussion of which certs are meaningful. Erik Eckel put together a list of the accreditations he believes currently hold value for IT pros.
IT certifications boast numerous benefits. They [...]

Runlevel 0: Halt System – To shutdown the system
Runlevel 1: Single user mode
Runlevel 2: Basic multi user mode without NFS
Runlevel 3: Full multi user mode (text based)
Runlevel 4: unused
Runlevel 5: Multi user mode with Graphical User Interface
Runlevel 6: Reboot System

Runlevels 1 and 2 are generally used for debugging purposed only, and are not used during [...]