systemctl
系统服务管理器指令
补充说明
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。
任务 | 旧指令 | 新指令 |
---|---|---|
使某服务自动启动 | chkconfig –level 3 httpd on | systemctl enable httpd.service |
使某服务不自动启动 | chkconfig –level 3 httpd off | systemctl disable httpd.service |
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) |
显示所有已启动的服务 | chkconfig –list | systemctl list-units –type=service |
启动服务 | service httpd start | systemctl start httpd.service |
停止服务 | service httpd stop | systemctl stop httpd.service |
重启服务 | service httpd restart | systemctl restart httpd.service |
重载服务 | service httpd reload | systemctl reload httpd.service |
实例
systemctl start nfs-server.service . # 启动nfs服务
systemctl?enable?nfs-server.service # 设置开机自启动
systemctl?disable?nfs-server.service # 停止开机自启动
systemctl?status?nfs-server.service # 查看服务当前状态
systemctl?restart?nfs-server.service # 重新启动某服务
systemctl?list-units?--type=service # 查看所有已启动的服务
开启防火墙22端口
iptables?-I?INPUT?-p?tcp?--dport?22?-j?accept
如果仍然有问题,就可能是SELinux导致的
关闭SElinux:
修改/etc/selinux/config
文件中的SELINUX=""
为disabled,然后重启。
彻底关闭防火墙:
sudo?systemctl?status firewalld.service
sudo?systemctl?stop?firewalld.service??????????
sudo?systemctl?disable?firewalld.service
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