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12 Chapter 1 Before You Begin
You can’t change the names or IDs of system accounts. So when you migrate users and
groups, don’t try to do so. However, you can add users during migration to two system
groups—admin and wheel:
 Wheel is a group that gives members almost as much control as root. If you’re a
member of the wheel group, you can use the su (substitute user) command in the
Terminal application to log in to a remote computer as the root user. Use ssh to log
in, type su, then supply the root password when prompted.
 The admin group gives members the right to administer Mac OS X Server. Admin
users can use server management applications and install software that requires
administrator privileges.
Here are the predefined user accounts:
Name Short name UID
Unprivileged User nobody -2
System Administrator root 0
System Services daemon 1
Printing Services lp 26
Postfix User postfix 27
VPN MPPE Key vpn_nnnnnnnnnnnn 57
World Wide Web Server www 70
Apple Events User eppc 71
MySQL Server mysql 74
sshd Privilege separation sshd 75
QuickTime Streaming Server qtss 76
Cyrus IMAP User cyrus 77
Mailman User mailman 78
Application Server appserver 79
Clamav User clamav 82
Amavisd User amavisd 83
Jabber User jabber 84
Xgrid Controller xgridcontroller 85
Xgrid Agent xgridagent 86
Application Owner appowner 87
WindowServer windowserver 88
Unknown User unknown 99