Setup centos

We recommend using Etcher. Download the application for your system Windows, macOS or Linux , install and run. To do so, select Install CentOS 7. That will open the installation wizard. Before starting the installation process itself, select which language you would like to use during installation. The default option is English. There are a couple of settings you would want to configure. All items marked with a warning icon must be configured before you begin the installation.

Once you have selected your time zone, hit Done to save your changes. Select the Keyboard option under the Localization heading to set the keyboard layout. The system default is English US and the language you selected in the initial window. Click the plus icon to add more layouts.

Move a layout to the top of the list to make it the default option. Click the Options button to define a key combination for switching between keyboard layouts. When you are satisfied with the settings defined, select the Done button to confirm the changes. Next, select the Language Support option under the Localization heading. The language selected in the Welcome to CentOS 7 window will be the default system language. If necessary, select additional languages and hit the Done button once you are finished.

Select the Software Selection option under the Software heading. You will see a list of predefined Base Environment options and optional add-ons. This part entirely depends on your needs. When you have selected the base environment and optional add-ons, click the Done button.

Wait for the system to check for software dependencies before you move on to the next option. When you finish, navigate to OK using [tab] key to save the configuration and quit.

In order to view the network interface settings, you can inspect the content of the interface file or you can issue the below commands. Other useful utilities that can be used to manage speed, link state or obtain information about machine network interfaces are ethtool and mii-tool. CentOS 7 manages daemons or service via systemctl utility.

In order to list all services state, issue the following command. To check if a daemon or service is enabled to automatically start when the system starts, issue the following command. To list the old SysV services present in your system and disable them issue the following chkconfig commands.

For instance, Postfix daemon is installed and enabled by default in CentOS 7. In addition to netstat , ss , lsof or systemctl commands, you can also run ps , top or pstree commands in order to discover and identify what unwanted services are running in your system and disable or remove them. By default, pstree utility is not installed in CentOS 7.

To install it execute the following command. Firewalld is the main firewall utility that uses interacts with in order to manage iptables rules. To enable and start and verify the firewall in CentOS 7, execute the following commands.

In order to open a specific service to incoming connections, first verify if the application is already present in firewalld rules and, then, add the rule for the service, as shown in the below example which allows SSH incoming connections. Use --permanent switch to add the rule permanently. In case the service is now already defined in firewalld rules, you can manually add the service port, as shown in the below example. In order to grant root permissions for a normal user, first create the user by issuing adduser command , set the password for the user and grant root permissions to the user by executing the below command which adds the new user to the administrative wheel group.

In order to secure SSH your server and set up public key authentication to increase the security of your server with a private SSH key to log in, first generate a SSH Key Pair with a following command. After the SSH key pairs had been generated, copy the key to the server you want to connect to by issuing the below command. Now, wait for some time. After completion of your installation, it will ask for Rebooting your system, so click the Reboot button.

Now your CentOS 7 has been successfully installed on your system. Now install requires software to do your other tasks and start using your CentOS distribution of Linux.

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How to Install CentOS?