So you’ve passed all prerequisite steps successful.You’re ready to run actual upgrade command
./dbnodeupdate.sh -u -l /u01/patches/p29181103_191000_Linux-x86-64.zip -n
-n :Keeps your current backup otherwise it takes another backup.I recommend you take backup in advance ,it helps you to save some time.
This upgrade process takes around 1h-1.5h but in my case upgrading to version 19 requires major Linux OS upgrade (Red Hat 7.6) and took more than 2h.
During upgrading process server goes reboot couple of times,i always monitor server reboot with ILOM.
Check imageinfo everytime when the server come up,the image status must show success.
[root@o***** ~]# imageinfo
Kernel version: 4.1.12-124.23.4.el7uek.x86_64 #2 SMP Sun Dec 23 20:59:33 PST 2018 x86_64
Image kernel version: 4.1.12-124.23.4.el7uek
Image version: 188.8.131.52.0.190111
Image activated: 2019-02-27 12:48:41 -0600
Image status: success
System partition on device: /dev/mapper/VGExaDb-LVDbSys1
2-Post upgrade step
After upgrade completed,you have to perform post upgrade step.It is basically RELINK oracle binaries.