Linux服务器,服务管理--systemctl命令详解,设置开机自启动html
syetemclt就是service和chkconfig这两个命令的整合,在CentOS 7就开始被使用了。linux
摘要: systemctl 是系统服务管理器命令,它实际上将 service 和 chkconfig 这两个命令组合到一块儿。服务器
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) |
显示全部已启动的服务 | chkconfig --list | systemctl --type=service |
启动某服务 | service httpd start | systemctl start httpd.service |
中止某服务 | service httpd stop | systemctl stop httpd.service |
重启某服务 | service httpd restart | systemctl restart httpd.service |
下面以nfs服务为例:tcp
1.启动nfs服务spa
systemctl start nfs-server.service
2.设置开机自启动rest
systemctl enable nfs-server.service
3.中止开机自启动code
systemctl disable nfs-server.service
4.查看服务当前状态server
systemctl status nfs-server.service
5.从新启动某服务htm
systemctl restart nfs-server.service
6.查看全部已启动的服务blog
systemctl --type=service
开启防火墙22端口
iptables -I INPUT -p tcp --dport 22 -j ACCEPT
若是仍然有问题,就多是SELinux致使的
关闭SElinux:
修改/etc/selinux/config文件中的SELINUX=”” 为 disabled,而后重启
完全关闭防火墙:
sudo systemctl status firewalld.service sudo systemctl stop firewalld.service sudo systemctl disable firewalld.service