I have been trying to determine the best way to get a full timestamp for the last time of system startup (in Terminal.)
I pulled the timestamp from
“ls -1lnUT /var/run/utmpx”
Is there a better method, or, is there a situation where this method would not work?
Thank you in advance.
Your example appears to report the same time:
iMac06:~ john$ who -b
reboot ~ Sep 2 15:49
iMac06:~ john$ ls -1lnUT /var/run/utmpx
-rw-r--r--@ 1 0 1 4396 Sep 2 15:49:34 2017 /var/run/utmpx
iMac06:~ john$
Your example appears to report the same time:
iMac06:~ john$ who -b
reboot ~ Sep 2 15:49
iMac06:~ john$ ls -1lnUT /var/run/utmpx
-rw-r--r--@ 1 0 1 4396 Sep 2 15:49:34 2017 /var/run/utmpx
iMac06:~ john$
who -b
The reason I was looking for the more precise value is because I am working on some scripts. In some instances, I do not want the scripts to run if the system has not been running for more than, say, 30 minutes.
The uptime command presents the information in three different styles, depending on the elapsed time since boot.
As you can see, the “who -b” output is not as precise as the “ls” command.
"By default, who gathers information from the file /var/run/utmpx."
Good luck.
As you can see, the “who -b” output is not as precise as the “ls” command.
Time stamp of last boot
