Archive for » July 13th, 2009«

How to check run level on Linux Server?

By Gunjan · July 13, 2009

To check run level run “who -r” on shell it will show you current run level set on your server.

root@Gunjan [~]# who -r
run-level 3 2009-01-07 21:19 last=S

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What is process ID zero and process ID one?

By Gunjan ·

Process ID zero

All idle task has process ID zero and never exits.

Process ID one


 The init process having process ID 1, which is never be used but waiting around for its child processes to die. Usually started for /etc/inittab

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