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I have to admin that I have not touched a linux box in a long while but if you look at &nbsp;/var/log for boot.log files, it should show you the date those files were created which is at boot time. &nbsp;Assuming your machine has not been off for any extended period of time then the create dates for those files (boot.log, boot.log.1, boot.log.2, ...) should tell you when the machine have been rebooted (or more accurately: booted)
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I have to admin that I have not touched a linux box in a long while but if you look at  /var/log for boot.log files, it should show you the date those files were created which is at boot time.  Assuming your machine has not been off for any extended period of time then the create dates for those files (boot.log, boot.log.1, boot.log.2, ...) should tell you when the machine have been rebooted (or more accurately: booted)

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last reboot<br />
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&nbsp; Then see the close reboot times.
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last reboot

  Then see the close reboot times.

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Hello, I am wondering what should be the way to find the duration of last update of Linux OS. I can see that currently my box is UP by 20 days, now I would like to know for how many days it was UP before the last reboot. Is there a way to find it out? Thanks!
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Hello, I am wondering what should be the way to find the duration of last update of Linux OS. I can see that currently my box is UP by 20 days, now I would like to know for how many days it was UP before the last reboot. Is there a way to find it out? Thanks!

How to find the last uptime of Linux OS

Linux is a UNIX-like open source operating system with hundreds of distinct distributions, including: Fedora, openSUSE, Ubuntu, Debian, Slackware, Gentoo, CentOS, and Arch Linux. Linux is generally associated with web and database servers, but has become popular in many niche industries and applications.