How to update CentOS 8

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< Enable and disable services | Use modules >

You can upgrade the system with dnf-3. yum and dnf are both linked to dnf-3.

[[email protected] ~]# which yum
/usr/bin/yum

[[email protected] ~]# ll /usr/bin/yum
lrwxrwxrwx. 1 root root 5 May 14 04:34 /usr/bin/yum -> dnf-3

[[email protected] ~]# ll /usr/bin/dnf
lrwxrwxrwx. 1 root root 5 May 14 04:34 /usr/bin/dnf -> dnf-3

[[email protected] ~]# ll /usr/bin/dnf-3
-rwxr-xr-x. 1 root root 1954 May 14 04:34 /usr/bin/dnf-3

# Check installed yum package

[[email protected] ~]# rpm -q yum
yum-4.0.9.2-5.el8.noarch

[[email protected] ~]# rpm -ql yum
/etc/yum.conf
/etc/yum/pluginconf.d
/etc/yum/protected.d
/etc/yum/vars
/usr/bin/yum
/usr/share/man/man1/yum-aliases.1.gz
/usr/share/man/man5/yum.conf.5.gz
/usr/share/man/man8/yum-shell.8.gz
/usr/share/man/man8/yum.8.gz

# Included files are all links to dnf
[[email protected] ~]# ll /etc/yum.conf
lrwxrwxrwx. 1 root root 12 May 14 04:34 /etc/yum.conf -> dnf/dnf.conf
[[email protected] ~]# ll /etc/yum/vars
lrwxrwxrwx. 1 root root 11 May 14 04:34 /etc/yum/vars -> ../dnf/vars

To upgrade system packages, you can run this command. You should run this after installing the system.

[[email protected] ~]# dnf -y upgrade
CentOS-8 - AppStream                            2.5 kB/s | 4.3 kB     00:01
CentOS-8 - Base                                 2.4 kB/s | 3.8 kB     00:01
CentOS-8 - Extras                               1.1 kB/s | 1.5 kB     00:01
Dependencies resolved.
.....
.....

< Enable and disable services | Use modules >