Reboot investigation problem

Linux and Unix-Like Linux
1

I have a linux server,in this i receive alarm as server has rebooted.
When i check uptime of the server it says that the server has rebooted but when i check output of who -b it says that the server rebooted very long back
Can some one help what is the issue here.

2

you must check date/time settings on your host.

  • check your history related date.(date or TZ set)
  • check boot scripts (is there any entry related ntpdate or date or TZ in rc.local or specific other scripts )
  • check your ntpd script(if enable , `chkconfig --list ntpd`)
  • check ntp.conf in main ntpd server (if use vmguest then check vmhost time settings)
  • check your source files for who|last command (for any corruption /var/run/utmp and/or /var/log/wtmp)

and uptime most probably does not change..

# cat /proc/uptime|awk '{ split($1/3600, a, ".") ; x=a[2]*60/10000 ; printf "%d:%0.2d\n", a[1], x}'
13:25
# uptime|sed -n 's/.*up \([^ ]*\),.*/\1/p'
13:25

regards
ygemici

1 Like
3

this is known bug in 2.4 kernel

you can check the real uptime with

-bash-3.00$ last -xf /var/run/utmp runlevel
runlevel (to lvl 3)                    Wed Jan 12 15:11 - 08:45 (150+16:33)

utmp begins Wed Jan 12 15:11:58 2011
-bash-3.00$

So this node is up 150days.

The bug report

https://bugzilla.redhat.com/show_bug.cgi?id=97373

1 Like
4

Thnx for the help.