Logins

[Peter P.]

Check the permissions on the tty devices and the relevant permissions on login,
also /etc/login.defs @TTYPERM,TTYGROUP and /etc/securetty for any special
settings. Finally it is possible to restrict multiple logins using apm
modules.And there are several programs and scripts which can restrict sessions
to single-login. See also man wtmp/utmp, last, w. Note that on most systems rxvt
etc does not count as a 'multiple login', only tty logins do. It is dead easy to
make a single-login script in Perl or just awk f.ex. using w and hook it into
/etc/profile so it runs on any login.

Peter (who cut his teeth with Slackware 10 years ago and fondly remembers the 
times)



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