intro —
introduction to system maintenance and operation
commands
The manual pages in section 8 contain information related to system operation
and maintenance. They describe commands concerning file systems, such as
edquota(8),
fsck(8),
mount(8), and
newfs(8). They also
cover commands concerning system backup/recovery, such as
dump(8) and
restore(8).
There are pages which document the running of the system, such as
afterboot(8),
ifconfig(8),
security(8), and
the configuration files located in
/etc.
Procedures concerning system failure are documented in
crash(8).
Section 8 pages also describe network services and daemons. The rest of this
page discusses some of the main daemons available on the
OpenBSD system, and how to enable/disable them.
System daemons are controlled by the script
rc(8), which is in turn
configured by
rc.conf(8). For
example the HTTP daemon
httpd(8) is
controlled by the following line from
rc.conf(8):
Thus it is not started by default. To enable or disable daemon processes,
administrators should edit the file
rc.conf.local(8)
or use the rcctl(8) utility. The
rc.conf.local(8)
file overrides variable assignments in
rc.conf(8). So to
enable
httpd(8), the
following line might be added to
/etc/rc.conf.local:
As can be seen above, this method is also used to specify additional options.
Below is a list of some of the daemons available. For further information, see
rc(8) and the individual
pages for the utilities.
If using the
amd(8)
daemon, go into the
/etc/amd directory and
set it up by renaming
master.sample to
master and editing it and creating other
maps as needed. Alternatively, you can get your maps with YP.
Relevant
rc.conf(8)
variables:
amd_flags and
amd_master.
If you are using a name server, check the
/etc/resolv.conf file. It may look
something like:
domain nts.umn.edu
nameserver 128.101.101.101
nameserver 134.84.84.84
search nts.umn.edu. umn.edu.
lookup file bind
If using a caching name server, add the line "nameserver 127.0.0.1"
first.
Relevant
rc.conf(8)
variables:
nsd_flags and
unbound_flags.
In order to make sure the system clock is correct, it may be synchronised with a
number of external sources. The utilities available are:
ntpd(8) and
rdate(8).
Relevant
rc.conf(8)
variables:
ntpd_flags.
If this is a BOOTP or DHCP server, edit
/etc/dhcpd.conf as needed. See also
diskless(8).
Relevant
rc.conf(8)
variables:
bootparamd_flags,
dhcpd_flags, and
dhcrelay_flags.
Edit
/etc/rbootd.conf if needed for remote
booting. If you do not have HP computers doing remote booting, do not enable
this. See also
diskless(8).
Relevant
rc.conf(8)
variables:
rbootd_flags.
On
OpenBSD it will
chroot(2) to
/var/www. Detailed information is available
in
httpd(8) and
httpd.conf(5).
Relevant
rc.conf(8)
variables:
httpd_flags.
If this is an NFS server, edit
/etc/exports.
Relevant
rc.conf(8)
variables:
mountd_flags and
nfsd_flags.
A relay daemon,
relayd(8), able to
run as a load-balancer, application layer gateway, or transparent proxy.
Relevant
rc.conf(8)
variables:
relayd_flags.
Various daemons for managing routing tables are available:
bgpd(8),
eigrpd(8),
ospfd(8), and
ripd(8).
Relevant
rc.conf(8)
variables:
bgpd_flags,
eigrpd_flags,
ospfd_flags, and
ripd_flags.
Several services depend on the RPC portmapper,
portmap(8), being
running for proper operation. This includes YP and NFS exports, among other
services.
Relevant
rc.conf(8)
variables:
portmap_flags.
Check the YP domain name with the
domainname(1)
command. If necessary, correct it by editing the
/etc/defaultdomain file (see
defaultdomain(5)).
The
/etc/netstart script reads this file on
boot to determine and set the domain name. You may also set the running
system's domain name with the
domainname(1)
command.
Relevant
rc.conf(8)
variables:
ypbind_flags.
After starting YP client services, perform the remaining YP activation as
described in
passwd(5) and
group(5).
In particular, to enable YP passwd support, you'll need to add the following
line to
/etc/master.passwd:
+:*::::::::
You do this by using
vipw(8).
There are many more YP man pages available to help you. You can find more
information by starting with
yp(8).
afterboot(8),
rc(8),
rc.conf(8),
rcctl(8)
The
intro section manual page appeared in
4.2BSD.
![[OpenBSD]](/openbsd.gif){kind=small}