How to write a search to track system time change in a Linux system?

[vkumar6]

I need an example search to track system time change in a Linux system. Please help me.

[gcusello · Accepted solution]

Hi vkumar6.
The way to find if a server system time has changed is to take logs from /var/log/messages and create a search like this:

index=your_index source="/var/log/messages" “Time has been changed” | ...

before to do this you have to be sure that system time changes are correctly logged, if not you have to add following to the audit.rules file. Should record any attempt to set or adjust time from on—privileged user or root:

-S clock_settime –S settimeofday –S adjtimex

Bye.
Giuseppe

[vkumar6]

Thank you ... 🙂 Giuseppe

[gcusello]

Hi vkumar6.
if the solution solves your needs, please accept my answer.
By.
Giuseppe

[vkumar6]

Hi Giuseppe,

Is there any event code for linux when system time changes. Like windows we have Event code 4616 in the same do we have any event code for linux

[gcusello]

Hi vkumar6,
No, for my knoledge there aren't eventcodes in Linux but the message “Time has been changed” in "/var/log/messages" it's sufficient to trap this event.
Bye.
Giuseppe

[vkumar6]

Hi Giuseppe,

Thnakyou so much i m able to get logs .

Thanks,
Vijay

[gcusello]

modify your inputs.conf to take also "/var/log/messages".
Bye.
Giuseppe

[richgalloway]

Would you please be more specific about what you are trying to do?

[vkumar6]

Thankyou Rich I got answer from Giuseppe..