Permission denied after restore

Question

i have restored the fresh instance backup and untared it.
appl tier=p01
db tier=p02,p03,p04,p05
oracle database user is =orapix
appl user is = applpix
i have given chown -R applpix.dba p01
and i have given chown -R orapix.dba p02
chown -R orapix.dba p03
chown -R orapix.dba p04 chown -R orapix.dba p05
but after i did this when i restored the database i get the error during the database startup
[root@server1 etc]# su - orapix
su: warning: cannot change directory to /home/orapix: Permission denied
su: /bin/bash: Permission denied
please help me

Answer 1

tar does not include a username, only the UID and GID (user id and group id).
so if you create the same user on a new system, and do not specify UID and GID, it will take the first available UID and GID beyond the privileged UID and GID.
this can quite easy be another UID and GID than the system on which you've tarred it.
resolution: check which UID and GID's where on your original system, and recreate the user and groups with these ID's. (it's also very easy to be seen as root: if the UID is not taken, it will display just the ID's after untarring)
another gotcha: if you untar as a normal user, you can not create files with another ID than your own.