在红帽企业Linux（RHEL）8.2版本使用过程中，使用dnf安装新版本软件包，会出现报错：“Package xxx is already installed.”
解决方案
如果在使用dnf install
[root@shizhanxia.com ~]# cat /etc/dnf/dnf.conf [main] gpgcheck=1 installonly_limit=3 clean_requirements_on_remove=True best=True <------- skip_if_unavailable=False
诊断步骤
显示dnf软件包的版本
[root@shizhanxia.com ~]# dnf repoquery --installed dnf 显示bash包已安装版本及dnf源中的版本 [root@shizhanxia.com ~]# dnf list bash
当 /etc/dnf/dnf.conf配置文件设置best=False的时候
[root@shizhanxia.com ~]# cat /etc/dnf/dnf.conf [main] gpgcheck=1 installonly_limit=3 clean_requirements_on_remove=True best=False skip_if_unavailable=False [root@shizhanxia.com ~]# dnf install bash Updating Subscription Management repositories. Last metadata expiration check: 1:24:58 ago on Fri 02 Oct 2020 02:03:55 PM IST. Package bash-4.4.19-8.el8_0.x86_64 is already installed. Dependencies resolved. Nothing to do. Complete!
当 /etc/dnf/dnf.conf配置文件设置best=True的时候
[root@shizhanxia.com ~]# cat /etc/dnf/dnf.conf [main] gpgcheck=1 installonly_limit=3 clean_requirements_on_remove=True best=True skip_if_unavailable=False # dnf install bash Updating Subscription Management repositories. Last metadata expiration check: 1:25:39 ago on Fri 02 Oct 2020 02:03:55 PM IST. Package bash-4.4.19-8.el8_0.x86_64 is already installed. Dependencies resolved. Package Architecture Version Repository Size Upgrading: bash x86_64 4.4.19-10.el8 rhel-8-for-x86_64-baseos-rpms 1.6 M
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