Step By Step Update SAP Kernel in UNIX based

1. Login as root

2. Make new backup directory
cd /
mkdir 09062010                         (Date based)

3. Create latest kernel backup
cp -pr /sapmnt/SID/exe/* /09062010

4. Compare the original kernel and the backup
du -sk /sapmnt/SID/exe/  840413 /sapmnt/SID/exe #
du -sk /SIDkernel_10102007  841992 /SIDkernel_10102007 #

5. Make new shadow kernel directory
cd /
mkdir kernel

6. Copy the new downloaded kernel files into /kernel

7. Unpack the new downloaded kernel in folder /kernel
SAPCAR -xvf SAPEXE_175-20000221.SAR     
SAPCAR -xvf SAPEXEDB_175-20000223.SAR

8. Login as sidadm

9. Stop the SAP System
stopsap

10. Stop saposcol
saposcol -k

11. Login as root

12. Go to the current kernel directory
cd /usr/sap/SID/SYS/exe/run

13. Copy all extracted support packages into this folder
cp -pr /kernel/* /usr/sap/SID/SYS/exe/run

14. Copy back the original file saproot.sh into this folder.
cp -p /09062010/saproot.sh  /usr/sap/SID/SYS/exe/run

15. Go to the current kernel directory
cd /sapmnt/SID/exe
Then run:
./saproot.sh SID

16. Login as sidadm

17. Start the saposcol service
saposcol

18. Start the SAP system
startsap

NOTE:  Download the latest patch level from https://websmp109.sap-ag.de/support path Support Packages and Patches - Entry by Application Group Additional Components SAP Kernel SAP KERNEL 32-BIT UNICODE SAP KERNEL 6.40 32-BIT UNICODE

Download only two .SAR files e.g

SAPEXE_175-20000221.SAR     
SAPEXEDB_175-20000223.SAR

#Database independent

#Oracle