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at.deny(5) [centos man page]

AT.ALLOW(5)						     Linux Programmer's Manual						       AT.ALLOW(5)

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

Check Out this Related Man Page

ATD(8)							     Linux Programmer's Manual							    ATD(8)

atd - run jobs queued for later execution SYNOPSIS
atd [-l load_avg] [-b batch_interval] [-d] [-s] DESCRIPTION
atd runs jobs queued by at(1). OPTIONS
-l Specifies a limiting load factor, over which batch jobs should not be run, instead of the compile-time choice of 0.8. For an SMP system with n CPUs, you will probably want to set this higher than n-1. -b Specifiy the minimum interval in seconds between the start of two batch jobs (60 default). -d Debug; print error messages to standard error instead of using syslog(3). -s Process the at/batch queue only once. This is primarily of use for compatibility with old versions of at; atd -s is equivalent to the old atrun command. A script invoking atd -s is installed as /usr/sbin/atrun for backward compatibility. WARNING
atd won't work if its spool directory is mounted via NFS even if no_root_squash is set. FILES
/var/spool/atjobs The directory for storing jobs; this should be mode 700, owner at. /var/spool/atspool The directory for storing output; this should be mode 700, owner at. /etc/at.allow, /etc/at.deny determine who can use the at system. SEE ALSO
at(1), atrun(1), cron(8), crontab(1), syslog(3), at.deny(5), at.allow(5). BUGS
The functionality of atd should be merged into cron(8). local Mar 1997 ATD(8)
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