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       and - auto nice daemon


       and    [-htvsxf]    [-i    interval]    [-c    /path/to/and.conf]   [-d


       This manual page documents and version 1.2.2.


       The auto nice daemon activates itself in certain intervals and  renices
       and even kills jobs according to their priority and CPU usage.

       Renice  levels  and  kill  signals  can  be  defined in terms of users,
       groups, and commands. Wildcards can be specified for any of  these.  In
       addition, commands can be specified using POSIX regular expressions. To
       allow for network-wide configuration and priority  files,  a  mechanism
       for  hostname-based  evaluation  is  provided, again supporting regular
       expressions for specifying host names.

       Jobs owned by root are left alone. Jobs are never  increased  in  their

       Here are some real-world examples:

       A  certain  user  is  notorious for wasting CPU with next-to-irrelevant
       jobs.  One line is sufficient to renice all of his jobs  to  about  19.
       This  is  a typical situation for a LART (Luser’s Attitude Readjustment
       Tool) like and.

       A CPU server is dedicated to a certain group, but others may  also  use
       it  when  it’s  idle.  Just define default nice levels of e.g. 18 and a
       lower nice level for the privileged group, say nice level 12.

       A certain web browser who shall remain unnamed tends to go berserk once
       in  a  while.  You  can  configure  and to kill -9 it after e.g. 20 CPU


       -c /path/to/and.conf
            Specifies  the  configuration  file.  If  this  flag  is  omitted,
            /etc/and.conf is used instead.

       -d /path/to/and.priorities
            Specifies  the  priority  database  file. If this flag is omitted,
            /etc/and.priorities is used instead.

       -h   Produces a short help text.

       -i interval
            Sets the interval between nice level checks. This  flag  overrides
            the  interval  specified  in  the  configuration file, if any. The
            default interval of 60 seconds  is  used  if  neither  -i  nor  an
            interval directive in the configuration file is given.

       -s   Log to stdout. Without this switch, logging goes to syslog (normal
            operations) or  ./debug.and  (test  mode).  Useful  for  debugging
            config files.

       -t   Run  in test mode only, i.e. don’t really renice or kill anything.
            In this mode, logging goes into ./debug.and instead of syslog.

       -v   Increase verbosity.  For  maximum  verbosity,  this  flag  can  be
            specified  multiple  times.  Be warned that this will blow up your
            log files, so you should use it in test mode only.

       -x   Run in full operational mode, i.e. really renice or  kill  things.
            This is the default.

       -f   Foreground mode. Don’t daemonize.


       On  kill  -HUP  the auto nice daemon will reload its configuration file
       and priority database.


            General configuration file. Stores  default  nice  level,  default
            interval, the "time zones" and the database lookup affinity.

            The  priority database (in plain text). Contains the (user, group,
            command, nicelevels) tuples.

       Both files have their own manual pages.

            Contains logging and status information  for  debugging  purposes.
            Used in test mode only.


       and.conf(5), and.priorities(5), kill(1), regex(7), renice(8)



       The  auto  nice  daemon  and  this  manual page were written by Patrick
       Schemitz <>