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sysv-rc-conf (8)
>> sysv-rc-conf (8) ( Linux man: Команды системного администрирования )
NAME
sysv-rc-conf - Run-level configuration for SysV like init script links
SYNOPSIS
sysv-rc-conf [ options ]
sysv-rc-conf --list [ service ]
sysv-rc-conf [ --level levels ] service <on|off>
DESCRIPTION
sysv-rc-conf gives an easy to use interface for managing
"/etc/rc{runlevel}.d/" symlinks. The interface comes in two different
flavors, one that simply allows turning services on or off and another that
allows for more fine tuned management of the symlinks. It's a replacement for
programs like ntsysv(8) or rcconf(8).
sysv-rc-conf can also be used at the command line when the desired changes
to the symlinks are already known. The syntax is borrowed from chkconfig(8),
although it does not follow it exactly.
GENERAL OPTIONS
-c DIRECTORY, --cache=DIRECTORY
The directory where the priority numbers, old runlevel configuration, etc.
should be stored. This defaults to "/var/lib/sysv-rc-conf". See the FILES
section below and the --Purge option.
-r DIRECTORY, --root=DIRECTORY
The root directory to use. This defaults to "/". This comes in handy if the
root file system is mounted somewhere else, such as when using a rescue disk.
-P, --Purge
Purge the information stored in the cache file. See the FILES section below
and the --cache option.
-v FILE, --verbose=FILE
Print verbose information to "FILE"
-V, --Version
Print version information to STDOUT and exit
GUI RELATED OPTIONS
-o [ see description ], --order=[ see description ]
Allows various sorting orders and ways to display the rows. The argument can be
made up of any of the following:
a
Sort the rows alphabetically. This is the default if the -o option isn't
specified.
n
Show the priority numbers along with the name of the service.
p
Sorts by the priority numbers.
level
level can be any runlevel, 0-9 or S. This controls which runlevel the
priority numbers are sorted at. It only makes sense to use this in conjuntion
with p. If omitted the priority numbers are sorted by the current runlevel
the system is in.
-p, --priority
Alternate layout. Instead of just showing a checkbox, the priority of the
service and the S or K are allowed to be edited. This is for more fine tuned
control then the default layout allows.
-slevels, --show=levels
Which runlevels to show. This defaults to up to 8 of the runlevels available
on the system. Usually this means it will show 1, 2, 3, 4, 5, 0, 6, and S.
The syntax calls for the runlevels to be allruntogether. For instance, to
show runlevels 3, 4, and 5 the syntax would be "--show=345". Also see
--order.
CLI RELATED OPTIONS
--levellevels
The runlevels this operation will affect. levels can be any number from
0-9 or S. For example, --level 135 will affect runlevels 1, 3, and 5.
If --level is not set, the default is to affect runlevels 2, 3, 4, and 5.
This option is only used for the command line interface, see the section
below labled USING THE CLI for more information.
--list [name]
This option will list all of the services and if they are stopped or started
when entering each runlevel. If name is specified, only the information
for that service is displayed.
USING THE GUI
Note
When using either GUI layout described below, all configuration
changes to the symlinks will happen immediately, not when the program exits.
Using the Default layout
The default (simple) layout shows in a grid fashion all of the services that
are in "init.d" and which runlevels they are turned on at. For example, where
the "ssh" row and 3 column intersect, if there is an 'X' in the box there
that means the ssh service will be turned on when entering runlevel 3. If there
is no checkbox it can mean that either there are no links to the service in
that specific runlevel, or that the service is turned off when entering that
runlevel. If more configuration detail is needed, see the next paragraph and
the --priority option.
Using the Priority layout
The priority (advanced) layout also uses a grid fashion, but instead of
checkboxes there are text boxes that can have a few different values. If the
text box is blank, that means there isn't a symlink in that runlevel for that
service. This means that when changing into that runlevel that the service
will not be started or stopped, which is significant. If the text box starts
with the letter K that means that the service will be stopped when entering
that runlevel. If the text box starts with the letter S that means the service
will be started when entering that runlevel. The two digits following is the
order in which the services are started. That means that "S08iptables" would
start before "S20ssh". For more information see your system documentation.
Controls
To move around use the arrow keys, or if the terminal support it, the mouse.
Typically there is more then one page of services (unless the terminal screen
is large), to move between the pages use CTRL-n or CTRL-p, or simply arrow key
down or up at the bottom or top of the screen, respectively. The bottom of the
screen also shows these movement commands for quick reference. To restore the
symlinks back to their original state before the sysv-rc-conf was run,
press the r key. The h key will display a quick reference help screen.
Default layout
When using the default layout use the space bar to toggle the service on / off.
An 'X' in the checkbox indicates that the service is on.
Priority layout
The priority layout uses the default movement keys. In order to edit the fields
you can use CTRL-d to delete the character in front of the cursor or backspace
to backspace. Use CTRL-b or CTRL-f to move the cursor backwards or forwards
within the field. Note that only S, K, or any digit is allowed to be entered
into the field.
Starting / Stopping Services
To start a service now, press the "+" or "=" key.
To stop a service now, press the "-" key.
This will call "/etc/init.d/service start" or "/etc/init.d/service stop".
USING THE CLI
If the desired modifications to the symlinks are known and only one quick
change is needed, then you can use a CLI interface to sysv-rc-conf.
Examples:
# sysv-rc-conf --level 35 ssh off
# sysv-rc-conf atd on
The first example will turn ssh off on levels 3 and 5. The second example
turns atd on for runlevels 2, 3, 4, and 5.
FILES
Note: Feel free to skip this section
sysv-rc-conf stores a cache of all the symlink information from
"/etc/rc{runlevel}.d/" in "/var/lib/sysv-rc-conf/services" (See the --cache
option to change the location of this file). It uses this cache to make an
intelligent decision on what priority number to give the K or S link when they
are changed in the simple layout. This cache is updated/created everytime the
program is launched. The program needs to run with root privileges in
order to update the cache. The format of the file is as follows:
RUNLEVEL S|K PRIORITY SERVICE
Here's a few examples:
2 K 74 ntpd
2 K 50 xinetd
3 S 08 iptables
3 S 80 sendmail
sysv-rc-conf will first see if it can get an exact match from the cache.
For example, if the symlink for "cron" in runlevel 3 is S89cron and you
uncheck it, sysv-rc-conf will first see if there is an entry in the cache
that looks like "3 K nn cron", if so it will use nn for the priority number.
If there wasn't a match, sysv-rc-conf will then see if there is another S or
K (whichever you're switching to, so in this example, K) entry on a different
runlevel - so an entry like "i K nn cron", where i is any runlevel. If found,
the link will use nn.
If there still wasn't a match, sysv-rc-conf will look for the opposite of S
or K in any run level, and use 100 - that priority. So in our example,
"i S nn cron". If nn is 20, then it will use 80 (100 - 20), since that is
typically the way that the priority numbers are used.
If there still isn't a match, the default priority of 20 for S links is used,
and the default priority of 80 for K links is used.
COMPATIBILITY
sysv-rc-conf should work on any Unix like system that manages services
when changing runlevels by using symlinks in "/etc/rc{runlevel}.d/". Refer
to your system documentation to see if that's the case (usually there's a
"/etc/init.d/README").
CAVEATS
sysv-rc-conf only manages the symlinks in the "rc{runlevel}.d"
directories. It's possible that packages may have other ways of being
disabled or enabled.
Because Curses takes over the screen sometimes error messages won't be
seen on the terminal. If you run across any weird problems try redirecting
STDERR to a file when you execute the program.
