RHEL7指令
| 任务 | 旧指令 | 新指令 |
| 使某服务自动启动 | chkconfig --levle 235 httpd on | systemctl enable httpd.service |
| 使某服务不自动启动 | chkconfig --levle 235 httpd off | systemctl disable httpd.service |
| 检查服务状态 | service httpd status | systemctl enable 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 |
| 启动某服务 | service httpd start | systemctl start httpd.service |
| 停止某服务 | service httpd stop | systemctl stop httpd.service |
| 重启某服务 | service httpd restart | systemctl restart httpd.service |
例子：关闭RHEL7防火墙
查看防火墙服务状态：
[root@dbserver ~]# systemctl is-active firewalld.service
active
禁止防火墙：
[root@dbserver ~]# systemctl disable firewalld.service
rm '/etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service'
rm '/etc/systemd/system/basic.target.wants/firewalld.service'
查看防火墙服务状态：
[root@dbserver ~]# systemctl is-active firewalld.service
active
查看防火墙状态：
[root@dbserver ~]# systemctl status firewalld.service
firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled)
Active: active (running) since 三 2017-11-08 09:54:19 CST; 9min ago
Main PID: 817 (firewalld)
CGroup: /system.slice/firewalld.service
└─817 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid
11月 08 09:54:19 dbserver systemd[1]: Started firewalld - dynamic firewall daemon.
停止防火墙：
[root@dbserver ~]# systemctl stop firewalld.service
查看防火墙服务状态：
[root@dbserver ~]# systemctl status firewalld.service
firewalld.service - firewalld - dynamic firewall daemon
Loaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled)
Active: inactive (dead)
11月 08 17:54:03 dbserver systemd[1]: Starting firewalld - dynamic firewall daemon...
11月 08 09:54:19 dbserver systemd[1]: Started firewalld - dynamic firewall daemon.
11月 08 10:04:31 dbserver systemd[1]: Stopping firewalld - dynamic firewall daemon...
11月 08 10:04:33 dbserver systemd[1]: Stopped firewalld - dynamic firewall daemon.
[root@dbserver ~]#
[root@dbserver ~]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
[root@dbserver ~]# iptables -F
[root@dbserver ~]# iptables -L
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
[root@dbserver ~]#