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32 .\" $Heimdal: su.1 16528 2006-01-12 16:25:01Z joda $
40 .Nd substitute user identity
43 .Op Fl K | Fl -no-kerberos
47 .Oo Fl i Ar instance \*(Ba Xo
48 .Fl -instance= Ns Ar instance
51 .Oo Fl c Ar command \*(Ba Xo
52 .Fl -command= Ns Ar command
55 .Op Ar login Op Ar "shell arguments"
58 will use Kerberos authentication provided that an instance for the
59 user wanting to change effective UID is present in a file named
61 in the target user id's home directory
63 A special case exists where
66 needs to contain an entry for:
67 .Ql user Ns / Ns Ao instance Ac Ns @ Ns REALM
77 In the absence of either an entry for current user in said file or
78 other problems like missing
79 .Ql host/hostname@REALM
81 keytab, or user typing the wrong password,
83 will fall back to traditional
93 access only to members of the group
95 or to any user (with knowledge of the
97 password) if that group
98 does not exist, or has no members.
100 The options are as follows:
115 leave environment unmodified.
118 .Fl -instance= Ns Ar instance
119 root instance to use.
122 .Fl -command= Ns Ar command