Being root user [root@testserver ~]# ls -al /var/lib/psql/ ls: cannot access /var/lib/psql/: No such file or directory [root@testserver ~]# ls -al /var/lib/psql/9.4/ ls: cannot access /var/lib/psql/9.4/: No such file or directory [root@testserver ~]# ls -al /var/lib/psql/9.4/data ls: cannot access /var/lib/psql/9.4/data: No such file or directory [root@testserver ~]# sudo su - postgres
=============== Being postgress user - output -bash-4.2$ id uid=26(postgres) -bash-4.2$ ls -al /var/lib/psql/ ls: cannot access /var/lib/psql/: No such file or directory -bash-4.2$ ls -al /var/lib/psql/9.4/ ls: cannot access /var/lib/psql/9.4/: No such file or directory -bash-4.2$ ls -al /var/lib/psql/9.4/data ls: cannot access /var/lib/psql/9.4/data: No such file or directory -bash-4.2$