Now that all software is installed, all that we need to do to get a few programs running properly is to create their configuration files.
We need to create the /etc/nsswitch.conf file. Although glibc should provide defaults when this file is missing or corrupt, it's defaults don't work work well with networking which will be dealt with in a later chapter. Also, our timezone needs to be setup.
Create a new file /etc/nsswitch.conf containing:
# Begin /etc/nsswitch.conf
passwd: files
group: files
shadow: files
hosts: files dns
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: db files
# End /etc/nsswitch.conf
Run the tzselect script and answer the questions regarding your timezone. When you're done, the script will give you the location of the timezone file you need.
Create the /etc/localtime symlink by running:
root:~# cd /etc
root:etc# rm localtime
root:etc# ln -s ../usr/share/zoneinfo/<tzselect's output> \
> localtime
tzselect's output can be something like EST5EDT or Canada/Eastern. The symlink you would create with that information would be ln -s ../usr/share/zoneinfo/EST5EDT localtime or ln -s ../usr/share/zoneinfo/Canada/Eastern localtime
By default the dynamic loader searches a few default paths for dynamic libraries, so there normally isn't a need for the /etc/ld.so.conf file unless you have extra directories in which you want the system to search for paths. The /usr/local/lib directory isn't searched through for dynamic libraries by default, so we want to add this path so when you install software you won't be suprised by them not running for some reason.
Create a new file /etc/ld.so.conf containing the following:
# Begin /etc/ld.so.conf
/lib
/usr/lib
/usr/local/lib
# End /etc/ld.so.conf
Although it's not necessary to add the /lib and /usr/lib directories it doesn't hurt. This way you see right away what's being searched and don't have to remeber the default search paths if you don't want to.
Create the /etc/syslog.conf file containing the following:
# Begin /etc/syslog.conf
auth,authpriv.* -/var/log/auth.log
*.*;auth,authpriv.none -/var/log/sys.log
daemon.* -/var/log/daemon.log
kern.* -/var/log/kern.log
mail.* -/var/log/mail.log
user.* -/var/log/user.log
*.emerg *
# End /etc/syslog.conf
This package contains the utilities to modify user's passwords, add new users/groups, delete users/groups and more. I'm not going to explain to you what 'password shadowing' means. You can read all about that in the doc/HOWTO file. There's one thing you should keep in mind, if you decide to use shadow support, that programs that need to verify passwords (examples are xdm, ftp daemons, pop3 daemons, etc) need to be 'shadow-compliant', eg. they need to be able to work with shadowed passwords.
If you decide you don't want to use shadowed passwords (after you're read the doc/HOWTO document), you still use this archive since the utilities in this archive are also used on system which have shadowed passwords disabled. You can read all about this in the HOWTO. Also note that you can switch between shadow and non-shadow at any point you want.
Now is a very good moment to read chapter 5 of the doc/HOWTO file. You can read how you can test if shadowing works and if not, how to disable it. If it doesn't work and you haven't tested it, you'll end up with an unusable system after you logout of all your consoles, since you won't be able to login anymore. You can easily fix this by passing the init=/sbin/sulogin parameter to the kernel, unpack the util-linux archive, go to the login-utils directory, build the login program and replace the /bin/login by the one in the util-linux package. Things are never hopelessly messed up (at least not under Linux), but you can avoid a hassle by testing properly and reading manuals ;)
Create a new file /etc/inittab containing the following:
# Begin /etc/inittab
id:2:initdefault:
si::sysinit:/etc/init.d/rcS
su:S:wait:/sbin/sulogin
l0:0:wait:/etc/init.d/rc 0
l1:1:wait:/etc/init.d/rc 1
l2:2:wait:/etc/init.d/rc 2
l3:3:wait:/etc/init.d/rc 3
l4:4:wait:/etc/init.d/rc 4
l5:5:wait:/etc/init.d/rc 5
l6:6:wait:/etc/init.d/rc 6
ft:6:respawn:/sbin/sulogin
ca:12345:ctrlaltdel:/sbin/shutdown -t1 -a -r now
1:2345:respawn:/sbin/agetty /dev/tty1 9600
2:2345:respawn:/sbin/agetty /dev/tty2 9600
3:2345:respawn:/sbin/agetty /dev/tty3 9600
4:2345:respawn:/sbin/agetty /dev/tty4 9600
5:2345:respawn:/sbin/agetty /dev/tty5 9600
6:2345:respawn:/sbin/agetty /dev/tty6 9600
# End /etc/inittab
Programs like login, shutdown, uptime and others want to read from and write to the /var/run/utmp file. This file contains information about who is currently logged in. It also contains information on when the computer was last booted and shutdown.
Create the /var/run/utmp and give it the proper permissions by running the following commands:
root:~# touch /var/run/utmp
root:~# chmod 644 /var/run/utmp
By default Vim runs in vi compatible mode. Some people might like this, but I have a high preference to run vim in vim mode (else I wouldn't have included Vim in this book but the original Vi). Create the /root/.vimrc containing the following:
set nocompatible
set bs=2