Linux centos7 Common Command "SYSTEMCTL replacement service"

See all NIC IP addresses--ip addr

Start firewall--systemctl start Firewalld.service

Stop firewall--systemctl Stop Firewalld.service

View FIREWALLD firewall status--firewall-cmd--state

Disable firewall boot--systemctl disable Firewalld.service

Lists the running service status--systemctl

Start a service--systemctl start Postfix.service

Close a service--systemctl stop Postfix.service

Restart a service:--systemctl restart Postfix.service

Displays the status of a service--systemctl status Postfix.service

Enable a service at boot--systemctl enable Postfix.service

Disable a service at boot--systemctl disable Postfix.service

Check to see if the service is booting--systemctl is-enabled Postfix.service;echo $?

View the list of services started--SYSTEMCTL List-unit-files|grep enabled

Set system default startup RunLevel 3--ln-sf/lib/systemd/system/multi-user.target/etc/systemd/system/default.target

Set system default startup RunLevel 5--ln-sf/lib/systemd/system/graphical.target/etc/systemd/system/default.target

Original address: http://www.centoscn.com/CentOS/help/2015/0618/5687.html

Firewall common commands are as follows:

Firewall-cmd--state # #查看防火墙状态, whether it's running

Firewall-cmd--reload # #重新载入配置, such as after adding a rule, you need to execute this command

Firewall-cmd--get-zones # #列出支持的zone

Firewall-cmd--get-services # #列出支持的服务, the service in the list is released

Firewall-cmd--query-service FTP # #查看ftp服务是否支持, return yes or no

Firewall-cmd--add-service=ftp # #临时开放ftp服务

Firewall-cmd--add-service=ftp--permanent # #永久开放ftp服务

Firewall-cmd--remove-service=ftp--permanent # #永久移除ftp服务

Firewall-cmd--add-port=80/tcp--permanent # #永久添加80端口

Iptables-l-N # #查看规则, this command is the same as Iptables

Man Firewall-cmd # #查看帮助

1, the basic use of FIREWALLD

Start: Systemctl start Firewalld

View status: Systemctl status Firewalld

Stop: Systemctl Disable FIREWALLD

Disable: Systemctl stop Firewalld

2.systemctl is the main tool in CentOS7 's service management tool, which incorporates the functionality of the previous services and Chkconfig.

Start a service: Systemctl start Firewalld.service

Close a service: Systemctl stop Firewalld.service

Restart a service: Systemctl restart Firewalld.service

Displays the status of a service: Systemctl status Firewalld.service

Enable a service at boot: Systemctl enable Firewalld.service

Disable a service at boot: systemctl disable Firewalld.service

Check if the service is booting: Systemctl is-enabled firewalld.service

To view a list of services that have been started: Systemctl List-unit-files|grep enabled

To view a list of services that failed to start: Systemctl--failed

3. Configure Firewalld-cmd

View version: Firewall-cmd--version

View Help: Firewall-cmd--help

Display Status: Firewall-cmd--state

View all open ports: Firewall-cmd--zone=public--list-ports

Update firewall rules: Firewall-cmd--reload

View area information: Firewall-cmd--get-active-zones

View the specified interface area: Firewall-cmd--get-zone-of-interface=eth0

Reject All packages: Firewall-cmd--panic-on

Cancel deny status: Firewall-cmd--panic-off

To see if rejected: Firewall-cmd--query-panic

So how do I open a port?

Add to

Firewall-cmd--zone=public--add-port=80/tcp--permanent (--permanent permanent, no failure after this parameter restart)

Re-loading

Firewall-cmd--reload

View

Firewall-cmd--zone= Public--query-port=80/tcp

Delete

Firewall-cmd--zone= Public--remove-port=80/tcp--permanent

Linux centos7 Common Command "SYSTEMCTL replacement service"