Provided by: and_1.2.1-2_i386
and - auto nice daemon
and [-htvsx] [-i interval] [-c /path/to/and.conf] [-d
This manual page documents and version 1.2.1.
The auto nice daemon activates itself in certain intervals and renices
and even kills jobs according to their priority and CPU usage.
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 privilegued 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
Specifies the configuration file. If this flag is omitted,
/etc/and.conf is used instead.
Specifies the priority database file. If this flag is omitted,
/etc/and.priorities is used instead.
-h Produces a short help text.
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
-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.
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