Following statement will be used to change default shell to /bin/ksh for oracle user.
[root@oem ~]# chsh -s /bin/ksh oracle
Changing shell for oracle.
Shell changed.
[root@oem ~]#
Following statement will be used to change default shell to /bin/ksh for oracle user.
[root@oem ~]# chsh -s /bin/ksh oracle
Changing shell for oracle.
Shell changed.
[root@oem ~]#