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Operating Systems Linux Red Hat Difference between uptime and who -b Post 302950346 by RavinderSingh13 on Thursday 23rd of July 2015 03:08:14 PM
Old 07-23-2015
Hello seenuvasan1985,

You can always refer man pages for options. Like as follows.
For uptime:
Quote:
UPTIME(1) Linux User’s Manual UPTIME(1)

NAME
uptime - Tell how long the system has been running.
For who -b:
Quote:
-b, --boot
time of last system boot
As above quotes, you can take one example who -b tells same like when a person(OS this case) born(came up) and uptime tells how old a person(OS this case, means what time it got rebooted last time) is. Just an silly and simple examples. Hope this helps you.


Thanks,
R. Singh
 

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uptime(1)							   User Commands							 uptime(1)

NAME
uptime - show how long the system has been up SYNOPSIS
uptime DESCRIPTION
The uptime command prints the current time, the length of time the system has been up, and the average number of jobs in the run queue over the last 1, 5 and 15 minutes. It is, essentially, the first line of a w(1) command. EXAMPLES
Below is an example of the output uptime provides: example% uptime 10:47am up 27 day(s), 50 mins, 1 user, load average: 0.18, 0.26, 0.20 ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
w(1), who(1), whodo(1M), attributes(5) NOTES
who -b gives the time the system was last booted. SunOS 5.10 18 Mar 1994 uptime(1)
All times are GMT -4. The time now is 07:46 AM.
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