systemctl

系統(tǒng)服務(wù)管理器指令

補充說明

systemctl命令 是系統(tǒng)服務(wù)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(wù) | 舊指令 | 新指令 | | ---- | ---- | ---- | | 使某服務(wù)自動啟動 | chkconfig --level 3 httpd on | systemctl enable httpd.service | | 使某服務(wù)不自動啟動 | 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) | | 顯示所有已啟動的服務(wù) | chkconfig --list | systemctl list-units --type=service | | 啟動服務(wù) | service httpd start | systemctl start httpd.service | | 停止服務(wù) | service httpd stop | systemctl stop httpd.service | | 重啟服務(wù) | service httpd restart | systemctl restart httpd.service | | 重載服務(wù) | service httpd reload | systemctl reload httpd.service |

實例

systemctl start nfs-server.service . # 啟動nfs服務(wù)
systemctl?enable?nfs-server.service # 設(shè)置開機(jī)自啟動
systemctl?disable?nfs-server.service # 停止開機(jī)自啟動
systemctl?status?nfs-server.service # 查看服務(wù)當(dāng)前狀態(tài)
systemctl?restart?nfs-server.service # 重新啟動某服務(wù)
systemctl?list-units?--type=service # 查看所有已啟動的服務(wù)

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(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