Verify Permissions on Files with Local Account Information and Credentials

$ sudo chgrp root /etc/group-

$ sudo chgrp root /etc/gshadow-

$ sudo chgrp root /etc/passwd-

$ sudo chgrp root /etc/shadow-

$ sudo chgrp root /etc/group

$ sudo chgrp root /etc/gshadow

$ sudo chgrp root /etc/passwd

$ sudo chgrp root /etc/shadow

$ sudo chown root /etc/group- 

$ sudo chown root /etc/gshadow- 

$ sudo chown root /etc/passwd- 

$ sudo chown root /etc/shadow- 

$ sudo chown root /etc/group 

$ sudo chown root /etc/gshadow 

$ sudo chown root /etc/passwd 

$ sudo chown root /etc/shadow 

$ sudo chmod 0644 /etc/group-

$ sudo chmod 0000 /etc/gshadow-

$ sudo chmod 0644 /etc/passwd-

$ sudo chmod 0000 /etc/shadow-

$ sudo chmod 0644 /etc/group

$ sudo chmod 0000 /etc/gshadow

$ sudo chmod 0644 /etc/passwd

$ sudo chmod 0000 /etc/shadow

$ sudo chown root /etc/security/opasswd 

$ sudo chgrp root /etc/security/opasswd

$ sudo chmod 0600 /etc/security/opasswd

$ sudo chgrp root /etc/shells

$ sudo chown root /etc/shells 

$ sudo chmod 0644 /etc/shells