command echo

I‘d like to skip first two or three fields at the the beginning of a line and print the rest of line. Consider the following input:

This is a test
Giving back more than we take

I want my input file with the following output:

a test
more than we take

How do I printing lines from the nth field using awk under UNIX or Linux operating systems?

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How do I change or set my hostname ( computer name ) under OpenBSD operating system?

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How do I rescan an HP Smart Array for new disks without rebooting in CentOS or Debian or RHEL server?

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