Nginx, 相關指令
1. 備份設定檔案/etc/nginx/nginx.conf
2. 解除安裝 yum remove nginx
3. 重新到目錄cd /tmp/nginx12e17/
4. 重新安裝 rpm -ivh nginx-1.20.2-1.el7.ngx.x86_64.rpm
5. 復原備份設定檔/etc/nginx/nginx.conf
6. 啟動systemctl start nginx
7. 確認版本nginx -v
http://nginx.org/packages/centos/7/x86_64/RPMS/