This is a simple bash script I whipped together to make som custom changes on our linux installations, it can be used as a kickstart post-configuration file for RedHat RHEL4 and RHEL5 installations.

#!/bin/bash

# Enable daily updates of the locate database
perl -pi -e 's/DAILY_UPDATE=no/DAILY_UPDATE=yes/' /etc/updatedb.conf

# Customize login banners
echo "Authorized users only.  All activity may be monitored and reported" >> /etc/motd
echo "Authorized users only.  All activity may be monitored and reported" >> /etc/issue.net

# Disable SELinux (this should be changed back when any problems with it has been fixed)
#perl -pi -e 's/^SELINUX=.*$/SELINUX=Disabled/' /etc/selinux/config

# Configure tcp wrappers host access to allow only ssh access
cat <> /etc/hosts.allow
ALL:localhost
sshd:ALL
EOF
cat <> /etc/hosts.deny
ALL:ALL
EOF