Sharing Knowledge | System Admin Articles

Preparing reboot HPUX Server



Another nice article which I found on web

System administrators will often reboot their boxes because of certain need like patch installation and kernel parameter change. Below is a guide to properly shutdown and reboot the system.

THE PRE-WORK

1. Get important system information:

Common Information needed
# hostname
# date
# model
# uname -a
# uptime
# who -r

2. Gather filesystem information


# showmount -e
shows all exported filesystems
# showmount -a
shows all current filesystems exported
login to those systems and unmount all NFS relating to the system to be rebooted
# bdf > bdf.out
Create a list of all mounted filesystem before reboot.
You will compare this later after the reboot
# bdf | wc -l
Take note of the number of mounted filesystem
# bdf -t nfs
Also take note of its NFS mounts.
You need to verify everything is mounted after the reboot.

3. Stop database and applications

Please coordinate the reboot / shutdown to the applications team. Most important applications and database should be stop before reboot or data corruption might happen.

Example of applications/database verification

# ps -ef | grep oracle

Oracle Database
# ps -ef | grep sap
SAP Applications

4. Backup /stand/vmunix and /stand/system. If these files were corrupted during reboot, boot will fail.

# cp -ip /stand/vmunix /stand/vmunix.backup
# cp -ip /stand/system /stand/system.backup

5. Backup fstab and comment out NFS entries. These will prevent long system hangs during reboot.

# cp -p /etc/fstab /etc/fstab.backup
# vi /etc/fstab

(Comment all NFS entries)If not yet shutdown

6. Execute the shutdown command

# shutdown -r -y 0
This command reboots the server. If you want it to halt shutdown -h -y 0
# shutdown -h -y 0
If hardware change it needs halt

After Booting

# cp -p /etc/fstab.backup /etc/fstab
Return the original fstab
# mount -a
Mount all NFS entries

Verify Filesystem

# showmount -a
# bdf | wc -l
# bdf -t nfs

Compare these to the ones perform before reboot.

Check Logs for errors

# more /var/adm/syslog/syslog.log
# dmesg

Finally, if all is well, ask the application team to start their applications and database.


Labels: Booting, HP-UX, TFTP

My Profile PhotoAbout the Author

I'm Parthiban, An UNIX System Admin by Profession. I'm Experienced in Linux/Unix System Administration and Scripting. I have done lot of work on the infrastructure Mgmt side in Linux, UNIX and Windows system administration, Hardware, Storage and Data center. I'm blogging since 2008.
Follow Me On Twitter or On Facebook

2 Comments for "Preparing reboot HPUX Server"

hi ,

also i provide step before and after reboot server

details console ip
portion number
time zone
#echo $TZ
if you install file system utilite bdfmegs

#bdfmegs > dtae_bdfmegs

thanks
praphul

Hi Praphul,

Thanks a lot for the tips given..

What do you think about this Article? Add your Opinion..!

Back To Top