How to get up time for the terminal

Question

How to get the uptime from. The terminal. And in a bash file but only the uptime no other infomAtion

I would like it to be on one line

Answer 1

When in a terminal just run the following command.

uptime

This will display your current uptime plus a little ekstra information.

Mine says.

08:44:21 up 1:05, 2 users, load average: 0,00, 0,01, 0,05

So my uptime is 1 hour and 5 minutes. In a bash script to only get the uptime I'd use

uptime | awk '{print $3}'

This will show only the 3rd section of the uptime command.

Answer 2

Use echo $SECONDS , gives you the uptime of a terminal in seconds.

Answer 3

You can also use the top command to know the uptime.

top

In the top of the terminal, you can view the uptime status.

Answer 4

cat /proc/uptime | awk '{print $1}'

will give you the uptime expressed in seconds.

Answer 5

This will show you when your system has booted and print uptime in brackets also:

last -x | grep boot | head -n 1 

Answer 6

You can get the up time using different methods:

• using w command

  $ w
  
  11:12:21 up 22:08,  3 users,  load average: 0.28, 0.32, 0.40
  

  If you just want the time nothing else:

  $ w | grep up | awk '{print $3}'
  
  22:08,
  

• using uptime as described in other answer

• using top as described in other answer

• using utmp, you can see since when you are on:

  $ last utmp
  
  wtmp begins Mon Jun  1 08:29:04 2015
  

utmp maintains a full accounting of the current status of the system, system boot time (used by uptime), recording user logins at which terminals, logouts, system events.