Common instructions for operating Fabric in Centos7

Tip: This article is to record the code instructions commonly used in the learning process.

Table of contents

1. Centos system commands

1. Kernel version

2.Docker

3. Port open

4. Firewall

2. Fabric operation instructions

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1. Centos system commands

1. Kernel version

1.1 Kernel version and operating system version

uname -a  #uname -r

1.2 Check the running kernel version

cat /proc/version

2.Docker

2.1 Check the disk space occupied by docker

docker system df

2.2 Clean up all stopped containers

docker container prune 

2.3 Clean the disk, delete closed containers, useless data volumes and networks, and dangling images (ie, untagged images)

docker system prune

2.4 Clean up volumes

docker volume ls       // 查看当前卷列表
docker volume prune    // 清理无用的卷   加-f为强制清理

3. Port open

3.1 Open ports

firewall-cmd --zone=public --add-port=80/tcp --permanent   # 开放80端口
firewall-cmd --zone=public --remove-port=80/tcp --permanent  #关闭80端口
firewall-cmd --reload   # 配置立即生效

3.2 View all open ports on the firewall

firewall-cmd --zone=public --list-ports

3.3 Check which process the port is occupied by

netstat -lnpt | grep 80

 3.4 View process details

ps 80

3.5 Terminate the process

kill -9 80

4. Firewall

4.1 Check firewall status

firewall-cmd --state
#或者
systemctl status firewalld

 4.2 Turn off the firewall

systemctl stop firewalld

4.3 Turn on the firewall

systemctl start firewalld

2. Fabric operation instructions

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