SECURITY

nulladm /var/adm/wtmp      To recreate/clear down the wtmp file.

groups           Lists out the groups that the user is a member of
setgroups        Shows user and process groups

chmod abcd (filename)        Changes files/directory permissions

Where a is  (4 SUID) + (2 SGID)  + (1 SVTX)
      b is  (4 read) + (2 write) + (1 execute)  permissions for owner
      c is  (4 read) + (2 write) + (1 execute)  permissions for group
      d is  (4 read) + (2 write) + (1 execute)  permissions for others


 -rwxrwxrwx   -rwxrwxrwx   -rwxrwxrwx
  |||             |||             |||
   -               -               -
   |               |               |
 Owner           Group           Others

 -rwSrwxrwx = SUID   -rwxrwSrwx = SGID   drwxrwxrwt = SVTX


chown (new owner) (filename)        Changes file/directory owners
chgrp (new group) (filename)        Changes file/directory groups

chown (new owner).(new group) (filename)        Do both !!!

umask                            Displays umask settings
umask abc                        Changes users umask settings

where ( 7 - a = new file read permissions)
      ( 7 - b = new file write permissions) 
      ( 7 - c = new file execute permissions)

eg umask 022 = new file permissions of 755 = read write and execute for owner   
                                             read ----- and execute for group
                                             read ----- and execute for other

mrgpwd > file.txt      Creates a standard password file in file.txt

passwd                 Change current user password

pwdadm (username)      Change a users password

pwdck -t ALL           Verifies the correctness of local authentication

lsgroup ALL                      Lists all groups on the system
mkgroup (new group)              Creates a group
chgroup (attribute) (group)      Change a group attribute
rmgroup (group)                  Removes a group