Master yum: Local & Remote Repository Setup and Essential Package Commands

yum repository management

1. yum local repository

Mount the installation image and create a custom repository file in /etc/yum.repos.d/ with appropriate baseurl, gpgcheck, and enabled settings.

# cd /etc/yum.repos.d/
# ls
# rm -rf *
# vim xbz.repo
# cat xbz.repo
[BaseOS]
name=111
baseurl=file:///mnt/BaseOS
gpgcheck=0
enabled=1
[AppStream]
name=222
baseurl=file:///mnt/AppStream
gpgcheck=0
enabled=1
# mount /dev/cdrom /mnt/
# dnf clean all
# dnf list all
# dnf makecache
# sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

2. yum network repository

Replace the default remote repository with domestic mirrors such as Aliyun, 163, and Tsinghua to improve download speed.

# rm -rf *
# wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
# yum makecache
# dnf repolist all
# dnf repolist enabled
# dnf repolist disabled

3. yum management commands

Common options for installing and removing packages, illustrated with vim, wget, and man-db.

# dnf -y install vim
# dnf -y remove vim
# dnf -y install --nogpgcheck wget
# dnf -y install wget
# dnf -q install wget
# dnf -y update man-db
# dnf info man-db
# dnf history
# dnf history info 2
# dnf history undo 20

Additional useful commands include listing all packages, available updates, cleaning caches, and querying repository information.

# dnf list all | grep curl
# dnf list updates
# dnf list installed
# dnf list available
# dnf list updates | grep man-db
# dnf list all | grep man-db
# dnf list all | grep wget
# dnf list installed | grep wget
# rpm -qc wget
# dnf -y reinstall wget
# dnf -y install --downloadonly --downloaddir /tushanbu/ zstd
# dnf grouplist
# dnf groups mark install -y "System Tools"
# dnf grouplist -y

These commands cover package installation, removal, upgrades, history inspection, group management, reinstalling, and downloading packages without installing them.