找到yum.conf

[root@d78acc291c9e var]# find / -name yum.conf/etc/yum.conf

注释掉exclude那行，也可只删除httpd

[main]gpgcheck=1installonly_limit=3clean_requirements_on_remove=Truebest=True#exclude=httpd nginx php mysql mairadb python-psutil python2-psutil

//重新安装
yum install httpd -ysystemctl enable httpdsystemctl start httpdsystemctl status httpd

　　Active: active (running)

　　Status: "Started, listening on: port 80"

[root@d78acc291c9e var]# httpd -vServer version: Apache/2.4.37 (centos)Server built: Dec 23 2019 20:45:34

参考：

https://www.linuxquestions.org/questions/fedora-35/yum-can%27t-find-httpd-or-apache-547678/