Red Hat Enterprise Linux 3.0
Accessing the Configuration repository
To
obtain any configuration files specific to the Red Hat platform the
configuration repository must first be made available. To do this carry
out the following steps
e) Create a mount point using the command
“mkdir –p /export/home/unixcfg”
f)
Add an entry into the file /etc/fstab as shown below
mainfileserver.domain.local:/unixcfg - /export/home/unixcfg nfs - yes
user,bg,nosuid 0 0
g)
Issue the command “mount –a” which should mount the new file system
entry added in the previous step. You can ignore messages pertaining to
filesystems that are already mounted
h) You should now be able “cd” to the /export/home/unixcfg/ directory to recover any configuration files referenced in the rest of these instructions.
NIS configuration
To
configure the system as a NIS client use the authconfig utility
WARNING. The authconfig utility re-writes the /etc/nsswitch.conf file
with values that are not appropriate for the group1 environment. If
there is ever a need to rerun the authconfig utility be sure carry out
the following step to enter correct settings in nsswitch.conf
Nameservice switch configuration
Redhat
Linux uses the /etc/nsswitch.conf file to control name service lookups.
It is necessary to use a group1 specific version of this file as
detailed below.
Copy the name service
configuration file (nsswitch.conf) into the /etc directory from the
Redhat directory of the configuration file repository
Set up “/export/home/users” directory
NFS
mount
Most users’ home directories will be on the main file server. Carry out
the configuration actions below to enable users to access their home
directories automatically
a)
Create the /export/home/users mountpoint using the command “mkdir –p
/export/home/users” Note that any “local” contents of the directory
“/export/home/users” will not be visible once this file system is
mounted. Therefore check that “/export/home/users” contains no data at
this time. If it does take steps to preserve or delete it
b) Add an entry into the file /etc/fstab as shown below
mainfileserver.domain.local:/users /export/home/users nfs defaults 0 0
c) Issue the command “mount –a” which should mount the new file system
entry added in the previous step. You can ignore messages pertaining to
filesystems that are already mounted
d) You should now be able “cd” to the/export/home/users directory. The individual user directories should be visible
e) If the directory /home exists create a softlink in this directory pointing to /export/home/users as shown below
#ln –s /export/home/users /home/users
Set up NAS server “/export/home/hg1” NFS mount
Several key directories are mapped
to the “U” drive on the main file server. To enable their use it is
necessary to map the NAS server “U” drive to the “/export/home/hg1” NFS
mounted filesystem as shown below
a) Create the /export/home/hg1 mountpoint using the command “mkdir –p /export/home/hg1”
b) Add an entry into the file /etc/fstab as shown below
mainfileserver.domain.local:/homegroup1 /export/home/hg1 nfs defaults 0 0
c)
Issue the command “mount –a” which should mount the new file system
entry added in the previous step. You can ignore messages pertaining to
filesystems that are already mounted
d)
Ensure that if the directory “/export/home/group1” exists that its
contents are either unneeded or saved. It is suggested that it be
re-named to saved_group1
e) Create a soft link for /export/home/group1 and /home/group1 pointing to /export/home/hg1/ using a command of the form shown below
#ln –s /export/home/hg1/redhat3 /home/group1
#ln –s /export/home/hg1/redhat3 /export/home/group1
g) You should now be able “cd” to the /home/group1 directory.
Set up “/export/home/source” directory NFS mount
The source directory is on the main file server. This must be mounted on the /export/home/source directory
a)
Create the /export/home/source mountpoint using the command “mkdir –p
/export/home/source” Note that any “local” contents of the directory
“/export/home/source” will not be visible once this file system is
mounted. Therefore check that “/export/home/source” contains no data at
this time. If it does take steps to preserve or delete it
b) Add an entry into the file /etc/fstab as shown below
mainfileserver.domain.local:/source /export/home/source nfs defaults 0 0
c)
Issue the command “mount –a” which should mount the new file system
entry added in the previous step. You can ignore messages pertaining to
filesystems that are already mounted
d) Create a softlink to point /home/source at /export/home/source as shown below
#ln –s /export/home/source /home/source
Set up “/export/home/qatests” directory NFS mount
The qatests directory is on the main file server. This must be mounted on the /export/home/source directory
a)
Create the /export/home/qatests mountpoint using the command “mkdir –p
/export/home/qatests” Note that any “local” contents of the directory
“/export/home/qatests” will not be visible once this file system is
mounted. Therefore check that “/export/home/qatests” contains no data
at this time. If it does take steps to preserve or delete it
b) Add an entry into the file /etc/fstab as shown below
mainfileserver.domain.local:/qatests /export/home/qatests nfs defaults 0 0
c)
Issue the command “mount –a” which should mount the new file system
entry added in the previous step. You can ignore messages pertaining to
filesystems that are already mounted
d) Create a softlink to point /home/qatests at /export/home/qatests as shown below
#ln –s /export/home/qatests /home/qatests
Set up “/export/home/hg1output” directory NFS mount
The qaoutput directory is on the main file server. This must be mounted on the /export/home/source directory
a) Create the /export/home/hg1output mountpoint using the command “mkdir –p /export/home/hg1output”
b) Add an entry into the file /etc/fstab as shown below
mainfileserver.domain.local:/qaoutput /export/home/hg1output nfs defaults 0 0
c)
Issue the command “mount –a” which should mount the new file system
entry added in the previous step. You can ignore messages pertaining to
filesystems that are already mounted
d) Create a soft link for /export/home/group1/output and /home/group1/output pointing to /export/home/hg1output/
using a command of the form shown below. Note to obtain the correct
permissions to create this link it will be necessary to “su” to the
build user as shown below
#su build
$ln –s /export/home/hg1output/osf4 /export/home/group1/output
Set up “/export/home/unixcfg” directory NFS mount
The unixcfg directory area is on the main file server. This must be mounted on the /export/home/unixcfg directory
d) Create the /export/home/unixcfg mountpoint using the command “mkdir –p /export/home/unixcfg”
e) Add an entry into the file /etc/fstab as shown below
mainfileserver.domain.local:/unixcfg /export/home/unixcfg nfs rw,suid,soft 0 0
f)
Issue the command “mount –a” which should mount the new file system
entry added in the previous step. You can ignore messages pertaining to
filesystems that are already mounted
Crypt vs MD5 passwords
By
default Redhat AS 3 uses md5 passwords whereas the default for NIS is
to use the less secure crypt algorithm. It is not necessary to disable
the use of MD5 on the Redhat server as the Redhat NIS PAM seems to
assume that NIS will use crypt. Similarly the option to use MD5 rather
than crypt should not be enabled on the SFU NIS server as this will
break other Unix platforms that cannot use MD5
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