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2.5. Post-installation Procedures
The following steps are the security-related procedures that should be performed immediately after installation of Red Hat Enterprise Linux.
- Update your system. enter the following command as root:
~]#
yum update
- Even though the firewall service,
firewalld
, is automatically enabled with the installation of Red Hat Enterprise Linux, there are scenarios where it might be explicitly disabled, for example in the kickstart configuration. In such a case, it is recommended to consider re-enabling the firewall.To startfirewalld
enter the following commands as root:~]#
systemctl start firewalld
~]#systemctl enable firewalld
- To enhance security, disable services you do not need. For example, if there are no printers installed on your computer, disable the
cups
service using the following command:~]#
systemctl disable cups
To review active services, enter the following command:~]$
systemctl list-units | grep service