Install » Historie » Revision 4
Revision 3 (Jeremias Keihsler, 13.01.2017 08:31) → Revision 4/7 (Jeremias Keihsler, 13.01.2017 08:31)
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 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 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>