centos7系統(tǒng)服務(wù)管理命令systemctl
systemctl命令是系統(tǒng)服務(wù)管理器指令,它實(shí)際上將service和chkconfig這兩個(gè)命令組合到一起。
任務(wù) | 舊指令 | 新指令 |
使某服務(wù)自動(dòng)啟動(dòng) | chkconfig --level 3 httpd on | systemctl enable httpd.service |
使某服務(wù)不自動(dòng)啟動(dòng) | chkconfig --level 3 httpd off | systemctl disable httpd.service |
檢查服務(wù)狀態(tài) | service httpd status | systemctl status httpd.service (服務(wù)詳細(xì)信息) systemctl is-active httpd.service (僅顯示是否 Active) |
顯示所有已啟動(dòng)的服務(wù) | chkconfig --list | systemctl list-units --type=service |
啟動(dòng)某服務(wù) | service httpd start | systemctl start httpd.service |
停止某服務(wù) | service httpd stop | systemctl stop httpd.service |
重啟某服務(wù) | service httpd restart | systemctl restart httpd.service |
實(shí)例:
1.啟動(dòng)nfs服務(wù)
systemctl start nfs-server.service
2.設(shè)置開(kāi)機(jī)自啟動(dòng)
systemctl enable nfs-server.service
3.停止開(kāi)機(jī)自啟動(dòng)
systemctl disable nfs-server.service
4.查看服務(wù)當(dāng)前狀態(tài)
systemctl status nfs-server.service
5.重新啟動(dòng)某服務(wù)
systemctl restart nfs-server.service
6.查看所有已啟動(dòng)的服務(wù)
systemctl list -units --type=service
開(kāi)啟防火墻22端口
iptables -I INPUT -p tcp --dport 22 -j accept
如果仍然有問(wèn)題,就可能是SELinux導(dǎo)致的
關(guān)閉SElinux:
修改/etc/selinux/config文件中的SELINUX=””為disabled,然后重啟。
徹底關(guān)閉防火墻:
sudo systemctl status firewalld.service
sudo systemctl stop firewalld.service
sudo systemctl disable firewalld.service