背景
[root@poloyy ~]# yum makecache fast usage: yum makecache [-c [config file]] [-q] [-v] [--version] [--installroot [path]] [--nodocs] [--noplugins] [--enableplugin [plugin]] [--disableplugin [plugin]] [--releasever RELEASEVER] [--setopt SETOPTS] [--skip-broken] [-h] [--allowerasing] [-b | --nobest] [-C] [-R [minutes]] [-d [debug level]] [--debugsolver] [--showduplicates] [-e ERRORLEVEL] [--obsoletes] [--rpmverbosity [debug level name]] [-y] [--assumeno] [--enablerepo [repo]] [--disablerepo [repo] | --repo [repo]] [--enable | --disable] [-x [package]] [--disableexcludes [repo]] [--repofrompath [repo,path]] [--noautoremove] [--nogpgcheck] [--color COLOR] [--refresh] [-4] [-6] [--destdir DESTDIR] [--downloadonly] [--comment COMMENT] [--bugfix] [--enhancement] [--newpackage] [--security] [--advisory ADVISORY] [--bz BUGZILLA] [--cve CVES] [--sec-severity {Critical,Important,Moderate,Low}] [--forcearch ARCH] [--timer] yum makecache: error: argument timer: invalid choice: 'fast' (choose from 'timer')
根因
yum makecache fast 是 centos 7 下的命令，并不适用 8
解决方法
执行下面的命令即可
dnf makecache
