systemctl命令是系統服務管理器指令,它實際上將?service?和?chkconfig?這兩個命令組合到一起。
任務 | 舊指令 | 新指令 |
使某服務自動啟動 | chkconfig –level 3?httpd?on | systemctl?enable?httpd.service |
使某服務不自動啟動 | chkconfig –level 3 httpd off | systemctl disable httpd.service |
檢查服務狀態 | service httpd status | systemctl status?httpd.service (服務詳細信息) systemctl is-active httpd.service (僅顯示是否 Active) |
顯示所有已啟動的服務 | chkconfig –list | systemctl list-units —type=service |
啟動某服務 | service httpd start | systemctl start httpd.service |
停止某服務 | service httpd stop | systemctl stop httpd.service |
重啟某服務 | service httpd restart | systemctl restart httpd.service |
實例
1.啟動nfs服務
systemctl?start?nfs-server.service
2.設置開機自啟動
systemctl?enable?nfs-server.service
3.停止開機自啟動
systemctl?disable?nfs-server.service
4.查看服務當前狀態
systemctl?status?nfs-server.service
5.重新啟動某服務
systemctl?restart?nfs-server.service
6.查看所有已啟動的服務
systemctl?list?-units?--type=service
開啟防火墻22端口
iptables?-I?INPUT?-p?tcp?--dport?22?-j?accept
如果仍然有問題,就可能是SELinux導致的
關閉SElinux:
修改/etc/selinux/config
文件中的SELINUX=””
為disabled,然后重啟。
徹底關閉防火墻:
sudo?systemctl?status firewalld.service
sudo?systemctl?stop?firewalld.service??????????
sudo?systemctl?disable?firewalld.service
原文地址:http://man.linuxde.net/systemctl
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