Finding either boot time or login time
Cooper, Karl (US SSA)
karl.cooper@baesystems.com
Mon Feb 2 16:54:00 GMT 2009
> Mark J. Reed writes:
>> One-liner to display the boot time:
>> $ perl -lane 'print ~~localtime(time-$F[0])' /proc/uptime
>
> Ronald Fischer wrote:
>> Would you mind explaining the ~~ trick?
>
> Clever tricks are interesting, but definitely are an obfuscation.
> This makes things more plain:
>
> perl -lane 'print(scalar(localtime(time() - int($F[0]))))'
> /proc/uptime
I don't know perl, but I did try both of these one-liners on my
Cygwin 1.7 setup, and the output differs (by one second). I thought
that was interesting.
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