Installing Linux

End of life

At this moment CentOS 9 is only available as stream. So we need to find something else.

The co-founder of CentOS has started a new distro that we can use instead of CentOS. This is Rocky linux. This is also based on RedHet linux.

If you don't have a GUA for IPv6 you can forget it or use a fe80::/64 or fd00::/64 address.

If you want only a IPv4 server, ignore the IPv6 settings.

Download your installation distro and burn it on a USB-stick. You can use the minimal version whitch is for servers. Additional packages are downloaded when you install it. You can find the latest Rocky linux 9.4 for x86_64 on the download pages.
Read the release notes.
Read the documents.
If you use multiple harddisks make a partitionplan.
The machine must boot from USB-drive as first choice and HDD as second. Check your BIOS setup.
Connect the USB to your machine and reboot.
Follow the instructions. You can setup the network for IPv4 and IPv6 with fixed IP addresses.
Reboot the system after install, login as root and run yum -y update.
Configure the system.
1. Check if the networkcard is started at bootup. See /etc/sysconfig/network-scripts/ifcfg-xxx and /etc/sysconfig/network-scripts/ifcfg-lo files for ONBOOT="yes"
2. Check and config the firewall for IPv4 and IPv6. At this point only the SSH-port should be open.
3. Ping the server by its IPv4 and IPv6 address on a external host.
4. Ping on the server the gate by its IPv4 and IPv6 addresses.
5. Test with a ssh on a external host if you can connect to ssh by IPv4 and IPv6.
6. Only when the above works you can proceed with the rest. You can install the rest of the deamons and do maintanance via a SSH-terminal.