| 1 | systemctl
|
| 2 | ===
|
| 3 |
|
| 4 | 系统服务管理器指令
|
| 5 |
|
| 6 | ## 补充说明
|
| 7 |
|
| 8 | **systemctl命令** 是系统服务管理器指令，它实际上将 service 和 chkconfig 这两个命令组合到一起。
|
| 9 |
|
| 10 | | 任务 | 旧指令 | 新指令 |
|
| 11 | | ---- | ---- | ---- |
|
| 12 | | 使某服务自动启动 | chkconfig --level 3 httpd on | systemctl enable httpd.service |
|
| 13 | | 使某服务不自动启动 | chkconfig --level 3 httpd off | systemctl disable httpd.service |
|
| 14 | | 检查服务状态 | service httpd status | systemctl status httpd.service （服务详细信息） systemctl is-active httpd.service （仅显示是否 Active) |
|
| 15 | | 显示所有已启动的服务 | chkconfig --list | systemctl list-units --type=service |
|
| 16 | | 启动服务 | service httpd start | systemctl start httpd.service |
|
| 17 | | 停止服务 | service httpd stop | systemctl stop httpd.service |
|
| 18 | | 重启服务 | service httpd restart | systemctl restart httpd.service |
|
| 19 | | 重载服务 | service httpd reload | systemctl reload httpd.service |
|
| 20 |
|
| 21 | ### 实例
|
| 22 |
|
| 23 | ```shell
|
| 24 | systemctl start nfs-server.service . # 启动nfs服务
|
| 25 | systemctl enable nfs-server.service # 设置开机自启动
|
| 26 | systemctl disable nfs-server.service # 停止开机自启动
|
| 27 | systemctl status nfs-server.service # 查看服务当前状态
|
| 28 | systemctl restart nfs-server.service # 重新启动某服务
|
| 29 | systemctl list-units --type=service # 查看所有已启动的服务
|
| 30 | ```
|
| 31 |
|
| 32 | 开启防火墙22端口
|
| 33 |
|
| 34 | ```shell
|
| 35 | iptables -I INPUT -p tcp --dport 22 -j accept
|
| 36 | ```
|
| 37 |
|
| 38 | 如果仍然有问题，就可能是SELinux导致的
|
| 39 |
|
| 40 | 关闭SElinux：
|
| 41 |
|
| 42 | 修改`/etc/selinux/config`文件中的`SELINUX=""`为disabled，然后重启。
|
| 43 |
|
| 44 | 彻底关闭防火墙：
|
| 45 |
|
| 46 | ```shell
|
| 47 | sudo systemctl status firewalld.service
|
| 48 | sudo systemctl stop firewalld.service
|
| 49 | sudo systemctl disable firewalld.service
|
| 50 | ```
|
| 51 |
|
| 52 |
|
| 53 |
|