.TH AT.ALLOW 5 "Sep 1997" "" "Linux Programmer's Manual"
.SH NAME
at.allow, at.deny \- determine who can submit jobs via at or batch
.SH DESCRIPTION
The
.I /etc/at.allow
and
.I /etc/at.deny
files determine which user can submit commands for later execution via
.BR at (1)
or
.BR batch (1) .
.PP
The format of the files is a list of usernames, one on each line.  Whitespace
is not permitted.
.PP
If the file
.I @ETCDIR@/at.allow
exists, only usernames mentioned in it are allowed to use
.BR at .
.PP
If
.I @ETCDIR@/at.allow
does not exist,
.I @ETCDIR@/at.deny
is checked, every username not mentioned in it is then allowed
to use
.BR at .
.PP
An empty
.I @ETCDIR@/at.deny
means that every user may use
.BR at .
.PP
If neither exists, only the superuser is allowed to use at.
.SH "SEE ALSO"
.BR at (1),
.BR cron (8),
.BR crontab (1),
.BR atd (8).