在CentOS上安装和配置GitLab时，可能会遇到各种问题。以下是一些常见的故障排查步骤和解决方法：
sudo yum install curl openssh-server openssh-clients postfix cronie
sudo systemctl enable postfix
sudo systemctl start postfix
sudo lokkit -s http https ssh
curl -sS https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.rpm.sh | sudo bash
sudo yum install gitlab-ce
sudo gitlab-ctl reconfigure
sudo gitlab-ctl start
