Once sysf
has been fully set up, configuring a new host on the network
is a simple task. First one must add the new host-name in the hosts.conf
file. It must be added to the ALL
list as well as to any other
host groups
the host should belong to. There is no need to modify the sysf.conf
file.
The next task is to create all the necessary config files
. Most entry
will have a DEFAULT
or HOST GROUP
config file
.
These files will usually be
appropriate and require no alteration, but should one host require a
specific system file
one can make a copy of an existing config file
and customise it for the new host. SHARED
files can be ignored.
sysf
entries which have the h
flag set are the ones for which a
specific config file
must be created one way or another.
Most of them will be created during the installation of the operating system.
The Linux lilo.conf
or the fstab
files are typical examples.
Some of the host specific system files
can easily be prepared before the
new host is installed.
The /etc/sysconfig/network
file for example can be copied and
customised from an existing file. One would thus create the config file
prior to the installation of the new host.
Some other system files
, especially those which depend very much on the
hardware like the fstab
or the XF86Config
files, are better
created during the installation of the operating system. Any further
customisation can be done
just after the installation. In particular, one should at least add to the
fstab
file an NFS entry for the NFS partition on which the config directory
resides. The directory must be mounted before sysf
can be
used (though it can be mounted by hand too).
Once all the files have been prepared, the command
# sysf -OS_install ALLwill perform the appropriate operation to configure the new host. This command will create or update the
system
and config file
according
to the following rule:
If the config file
exists, the sysf -first_install
command is
executed, to make a copy of the system file
with the .DIST
extension (if there is
none yet) and to copy the config file
into the system file
. If the
config file
does not exist, then if the sysf h
flag is on for that entry, the
command sysf -new
is executed to create the config file
for the new
host.
If the sysf h
flag is off the config file
is created as a symbolic
link to the file NONE
(which does not need to exist).
The configuration of a new hosts can be performed using a script file like the one below:
#!/bin/csh -f ## kenighan is the name of the main server rm -f /root/.tcshrc ln -s /root/.cshrc /root/.tcshrc echo 'set prompt="`uname -n`:# "' >> /root/.cshrc cat >> /etc/fstab << EOF # Home directory kernighan:/direct/home /home nfs defaults # Shared directories kernighan:/direct/RPMS /usr/local/RPMS nfs defaults kernighan:/direct/Common /usr/local/common nfs defaults kernighan:/direct/sys /usr/local/sys nfs defaults kernighan:/direct/mail /var/mail nfs actimeo=0 EOF mkdir /usr/local/RPMS mkdir /usr/local/common mkdir /usr/local/sys if ( ! -d /extra/tmp ) then mkdir /extra/tmp chmod 777 /extra/tmp endif # mount the NFS file systems mount -a # Get ntpd running echo "setting the clock!" /etc/rc.d/init.d/ntpd stop /usr/sbin/ntpdate kernighan /usr/sbin/setclock /etc/rc.d/init.d/ntpd start # Install extra packages and patches (cd /usr/local/RPMS/RedHat7.2/PowerTools; rpm -ivh *.rpm) (cd /usr/local/RPMS/RedHat7.2/Patches; rpm -ivh *.rpm) # Configure the hosts using sysf. echo "Install system files" /usr/local/sys/bin/sysf -OSI ALL