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Linux Command: Put Laptop / Netbook In Hibernate / Suspend Mode

How do I suspend or hibernate from bash shell command line under Linux operating systems? How do I suspend or hibernate my Ubuntu Dell laptop using command line, without using additional software?
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Sysadmin because even developers need heroes!!!

Linux / UNIX: Bash Script Sleep or Delay a Specified Amount of Time

How do I pause for 5 seconds or 2 minutes in my bash shell script on a Linux or Unix-like systems?
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Linux / UNIX: Bash Loop Forever

I need to cycles through a loop forever using for or while syntax. How do I set such loop under UNIX or Linux operating systems?
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Test Iptables Script Remotely

How do I test iptables based script remotely over ssh session? How do I avoid lock outs?
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