Install » Historie » Revision 5
Revision 4 (Jeremias Keihsler, 13.01.2017 08:31) → Revision 5/7 (Jeremias Keihsler, 13.04.2019 10:27)
h1. Install Procedure for CentOS 7.x
I want to say first that this is not the only way of setting up such a system. There are many ways of achieving this goal but this is the way I take.
h2. 1 Requirements
To install such a system you will need the following:
* Download the two CentOS 7.x DVDs from a mirror next to you (the list of mirrors can be found here: http://isoredirect.centos.org/centos/6/isos/x86_64/).
* a fast Internet connection.
h2. 2 Preliminary Note
In this tutorial I use the hostname @server1.example.com@ with the IP address @192.168.0.100@ and the gateway @192.168.0.1@. These settings might differ for you, so you have to replace them where appropriate.
h2. 3 Configure The Base System
Boot from your first CentOS 7.x DVD.
As it can take a long time to test the installation media we skip this test here and press @<ENTER>@ at the boot prompt:
!{width 500}centos7_inst01.png!
Choose your language next:
!{width 500}centos7_inst02.png!
Instead of the step-by-step approach the previous CentOS-installer took, CentOS 7 uses a central point of configuration.
We will enter each section and return until all our settings are done.
!{width 500}centos7_inst03.png!
h3. Network & Hostname
Set the hostname manually, e.g. @server1.example.com@
Enable the network interfaces and @configure@ each of them
!{width 500}centos7_inst04.png!
On to the configure network. The default setting here is to configure the network interfaces with DHCP, but we are installing a server, so static IP addresses are not a bad idea… Click on the Edit button after selecting the interface.
!{width 500}centos7_inst07.png!
In the window that pops up uncheck Dynamic IP configuration (DHCP) and Enable IPv6 support and give your network card a static IP address (in this tutorial I'm using the IP address 192.168.0.100 for demonstration purposes) and a suitable netmask (e.g. 255.255.255.0; if you are not sure about the right values, http://www.subnetmask.info might help you) also enter a gateway (e.g. 192.168.0.1) and up to two DNS servers (e.g. 8.8.8.8 and 145.253.2.75). By default all interfaces are not connected automatically, in most cases you want to change this.
!{width 500}centos7_inst06.png!
h3. Date & Time
Choose your time zone:
Check Date and Time, as many services are very dependant on the timestamp you should set an approprate time-server or even better a time-server-pool. If you have internet access and are based in germany you might want to use following public NTP-server-pool.
<pre><code class="bash">
0.de.pool.ntp.org
1.de.pool.ntp.org
2.de.pool.ntp.org
3.de.pool.ntp.org
</code></pre>
check www.ntp.org for details. If you don't have access to a public NTP-server ask your admin for a local NTP-server.
!{width 500}centos7_inst08.png!
h3. Keyboard
Select your keyboard layout:
!{width 500}centos7_inst09.png!
h3. Installation Source
you may point to a local source or a web-based-server
!{width 500}centos7_inst10.png!
h3. Software Selection
for this example we go for a standard @GNOME-Desktop@
But you may want to consider a more appropriate selection for your system.
!{width 500}centos7_inst11.png!
h3. Installation Destination NON-RAID
Typically you will choose @Local Standard Disks@ here
!{width 500}centos7_inst12.png!
Now we must select a partitioning scheme for our installation. Usually you will want to configure the layout on your own.
!{width 500}centos7_inst13.png!
This will result in a small @/boot@ and a large @/@ partition as well as a swap partition. Of course, you're free to partition your hard drive however you like it.
|_. type |_. logical volume name |_. mount point |_. size |
|_. small database server | lv_swap | swap | 512|
|_. | lv_home | \home | 1024|
|_. | lv_var_log | \var\log | 1024|
|_. | lv_var | \var | 8192|
|_. | lv_root | \ | 8192|
Click on @Done@ to continue:
!{width 500}centos7_inst14.png!
* The hard drive is going to be formatted
* After the drive being formatted the partitioning layout needs to be written to disk
h3. Installation Destination RAID1
taken from: https://www.tuxfixer.com/centos-7-installation-with-lvm-raid-1-mirroring/
Select both disks from the available devices and choose “I will configure partitioning” option:
!{width 500}centos7_inst_raid1_01.png!
h2. 4 Install The Base System
!{width 500}centos7_inst15.png!
!{width 500}centos7_inst16.png!
h3. Set ROOT password
Give @root@ a password:
!{width 500}centos7_inst17.png!
h3. Create Additional User
you should always have a user even in a server environment. Use your root access only when necessary to prevent unintended changes to the system.
!{width 500}centos7_inst18.png!
!{width 500}centos7_inst19.png!
!{width 500}centos7_inst20.png!
h2. Initial Setup
!{width 500}centos7_inst21.png!
h3. Licence Information
!{width 500}centos7_inst22.png!
!{width 500}centos7_inst23.png!
If you enable kdump, you may want to stay with the preset defaults.
Let's go Finish
!{width 500}centos7_inst24.png!
Finally, the installation is complete, and you can remove your CD or DVD from the computer and reboot it:
Welcome to your GNOME-Desktop-Environment.
After finishing our installation let's login the very first time.
!{width 500}centos7_inst25.png!
We change the screen to a text console via @CTRL-ALT-F2@
Please provide your username @root@. Do you still remember the password you thought of a few minutes ago?
!{width 500}centos7_inst26.png!
get all the latest updates via @yum update@
!{width 500}centos7_inst27.png!
The installation begins. This will take a few minutes:
h2. 5 Post Installation Steps
h3. Install additional packages
With @minimal Desktop@ the most important packages are already installed. If you are curious about installed and available package-groups use
<pre><code class="bash">
yum grouplist
</code></pre>
and install additional groups via
<pre><code class="bash">
yum groupinstall "xxx"
</code></pre>