In order to avoid troublesome rpm installation dependencies, Linux provides yum method for software installation. There are two ways of yum, one depends on the yum source file in the network, and the second is to use the CD to build a yum file locally.
yum source file
| [base] | The name of the container must be placed in [] |
| name | container name |
| mirrorlist | Mirror site, can be commented out |
| baseurl | The address of the yum source server, and one of mirrorlist |
| enabled | Whether it is valid, if it is not written or written enabled=1, it will be valid, but if it is written enabled=0, it will not be valid |
| gpgcheck | Digital certificate verification, if it is 0, it is not enabled, it is recommended to enable it as much as possible, if the downloaded installation package is illegal, this verification will report a warning |
| gpgkey | Storage location of digital certificate public key |
Local CD build yum source
- mikdir /mnt/cdrom #Create a mount point
- mount/dev/cdrom /mnt/cdrom/ #mount CD
- Make the network yum source invalid, you can change the name, you can add enable=0
- Modify the location of the baseurl of yum that mounts the CD locally
- Modify enabled=1
Common yum commands
query class
- yum list query available yum source files
- yum search keywords to query the installation packages related to keywords on the server
Install
- yum -y install installation package name
- install means install
- -y means automatic answer yes
You don’t need to write all the names when installing, because yum is preset on the server in advance
upgrade
- yum -y update install package name
- update means upgrade
- -y means automatic answer yes
yum -y update means to upgrade all installation packages under Linux, including the kernel. Before 6.3, it will definitely cause the system to crash. Operate with caution
uninstall
- yum -y remove installation package name
- remove means uninstall
- -y means automatic answer yes
Try not to uninstall the software, the installation and uninstallation have dependencies, the uninstalled software may be depended on by other software, causing the system to crash