Root password Recovery SUN,AIX, LINUX(Redhat) and HP-UX
I am trying to cover the password file information and root password recovery . It is not the task of DBA but sometimes the knowledge of Unix administration task help us to do the activities in effective manner .
Password file information of root :-
Operating system Sun Solaris :- /etc/passwd and /etc/shadow
Operating system AIX :- /etc/passwd and /etc/passwd/security
Operating System Linux :- /etc/passwd and /etc/shadow
Operating System HP-UX :- /etc/passwd and /tcb/files/auth/r/root
Being a DBA we need to have good idea about unix important files .
Sun Solaris :-
boot cdrom -s
mkdir /tmp/a
mount the cd using mount /dev/<Device> /tmp/a
vi /tmp/a/etc/shadow
AIX
boot from cdrom or tape installation/Mantienance
start limited shell
getrootfs hd1sk0
vi /etc/security/passwd
Linux
If it LILO (Linux Loader) its a bootstrap program then we have the follow the below steps :-
lilo
Control -x
linux s
passwd root
If it GRUB (Grans Unified Bootloader) then
grub
c
kernel vmlinuz-2.4.9-13 single ro root=/dev/hda8 initrd /initrd-2.4.9-13.img boot
passwd root
HP-UX
boot interact with ipl ? Y
isl->hpux- iS
passwd root
Out of all the above opertaing system steps , i personally tried Linux (LILO) and it worked
About the Author Rajat
I am Rajat Dey and I have more than decade of Oracle experience from all major regions throughout the globe. I am well versed in most facets of Oracle, supporting database, fusion middleware and the eBusiness suite across many operating system platforms.Currently I am located in Sydney Oracle Financials 11i and Release 12,12.2 Oracle RDBMS 7x,8i , 9i,10g and 11g Amazon cloud . Oracle RAC 10g and 11g Oracle Applications Server Oracle Web logic Server OBIEE Hyperion SSO Oracle Portal PL/SQL UNIX SQL MS-SQL 2008. OEM 12c . Data Guard . Essbase . Database backup and recovery. Performance Tunning. TimeSten