I want to know how much time is taken by Ubuntu 14.04 when we start it. So for this I have added the below line in rc.local

awk '{print int($1/3600)":"int(($1%3600)/60)":"($1%60)}' /proc/uptime > /var/log/uptime.log

It is showing about 28 seconds. Can someone let me know how can I get more information about what steps are adding to this 28 seconds?

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