Click here for "Error Codes for Commercial Air Conditioners".

OracleLinux8.8 ; Initial settings after OS installation

1. Install bash completion extension package

2. Disabling SELinux

First, disable selinux. selinux is a feature that improves auditing and security in Linux, but when enabled, it can limit the behavior of services and the contents of the configuration considerably.
Therefore, it is basically a case of invalidation in many cases.

If this is not done, seinux will be enabled again when the server is restarted, so to permanently disable selinux, modify the /etc/sysconfig/selinux file.

Change "SELINUX=enforcing" to "SELINUX=disabled"

3. System Modernization

Update packages as soon as possible after OS installation.
However, when a dnf update is performed, a kernel update is also performed at the same time.
A kernel update may require rebooting the system or stopping services, or worse, a kernel panic may occur and the system may not boot. It is wiser to exclude the kernel from the update.
Run dnf -y update with "--exclude=kernel*" after it.
Kernel can be excluded from updates

4. Services to be stopped due to security measures

Stop the following services that you deem unnecessary.

5. Adding Repositories

5.1 Add EPEL repository

5.2 Add Remi's RPM repository

6. Network configuration (command line configuration method)

6.1 Host Name Change

Change the host name to Lepard

6.2 Static IP address settingStatic IP address setting

If the default setting is to obtain an IP address via DHCP during OS installation, change the network settings to a fixed IP address if necessary.

First, find out the name of your network interface with the following command
This time it is "ens160"

Edit the network configuration file and change the static IP address to "192.168.11.11

Reflect settings

7. Network configuration (how to configure via GUI)

7.1 Static IP address setting

If the default setting is to obtain an IP address via DHCP during OS installation, change the network settings to a fixed IP address if necessary. In this case, the network interface is named "ens160"

Change the address of the IPv4 configuration

Scroll down and click OK

7.2 Host Name Change

hange the host name to Lepard

8. Vim Settings

①Installing Vim Extensions

②Apply and reflect Vim

③Configure Vim as a user-specific environment

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