9. Software Installation on CentOS 7

Apr 13, 2024#CentOS7学习笔记164

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To install software on CentOS using yum, first mount the CD-ROM. Configure yum by modifying CentOS-Media.repo file. Change enabled=0 to enabled=1 to enable local source. Other parameters include gpgcheck=1 for integrity check and baseurl=file:///media/cdrom for local path. Install vim tool with "yum -y install vim". Install GNOME desktop environment with "yum -y groupinstall "X Windows System" and "GNOME Desktop". Set default runlevel to graphical.target in /etc/inittab and restart with "init 6". Install libreoffice with "yum -y install libreoffice*". For additional experiment, try installing KDE desktop environment and view available software packages with "yum grouplist".

Software Installation on CentOS (yum installation)#

Prerequisite: Mount the CD first#

mount /dev/cdrom /media/cdrom

Configure yum installation environment (local source)

Modify /etc/yum.repos.d/CentOS-Media.repo

Change enabled=0 to enabled=1 where 0 means disabled and 1 means enabled

Explanation of other parameters#
```
 1. `gpgcheck=1` integrity check
 2. `baseurl=file:///media/cdrom` file address `file://` indicates local path
 3. `[Repository Name]`
 4. `name=Repository Name`
```
Install vim tool

yum -y install vim (software name)

Install CentOS desktop environment (Gnome)

yum -y groupinstall "X Windows System"
yum -y groupinstall "GNOME Desktop"

Set default run level by checking /etc/inittab file

systemctl set-default graphical.target

After setting, restart: init 6
Install libreoffice

yum -y install libreoffice*

Additional experiment: Try installing the KDE desktop environment

Check software packages with yum grouplist