1.

Name the command that one should use to know how long the system has been running.

Answer»

Using the Uptime command, you can see how long your system has been ACTIVE. You can also determine the number of users with RUNNING sessions, and the AVERAGE system load for 1, 5, and 15 minutes. The information displayed at once can also be filtered based on your specified options. 

Example: $ uptime   

Entering the above command at the shell prompt, namely $ uptime, will PRODUCE the following output:

9:21am  up 86 day(s), 11:46,  3 users,  load average: 2.24, 2.18, 2.16



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