Summary of solutions to common Linux problems

1. Connect Centos7 under VMware and set a fixed IP

1) First, right-click the virtual image name and click "Settings"

2) Open the terminal and check the network

3) Edit this file as root user

4) Restart the network card and check the network

5) Edit the previously edited file again

[root@nginx ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens33

#IPADDRO and PREFIXO are as shown above. For GATWAYO and DNS1, you only need to change the last part of IPADDRO to 1.
IPADDRO=192.168.126.136
PREFIXO=24
GATWAYO=192.168.126.1
DNS1=192.168.126.1

6) Restart the network card and the setting is completed

[root@nginx ~]# systemctl restart network

2. Install wget on Linux

[root@nginx ~]# yum -y install wget

3. Linux installation tree

[root@nginx ~]# yum install tree -y

4. Install vim on Linux

[root@nginx conf]# yum -y install vim*

5. Linux installation zip

[root@Nginx images]# yum install zip

6. CentOS7 uses firewalld to open and close the firewall

• Start: systemctl start firewalld
• To shut down: systemctl stop firewalld
• Check the status: systemctl status firewalld
• Disable at boot: systemctl disable firewalld
• Enable at boot: systemctl enable firewalld

7. Install netstat on Linux

[root@Nginx sbin]# yum install net-tools

8. Linux uses netstat to check whether the port is occupied

[root@Nginx sbin]# netstat -anp|grep 8080
tcp 0 0 127.0.0.1:8080 0.0.0.0:* LISTEN 1245/nginx:master

9. Install bc calculator on Linux

[root@localhost ~]# yum install bc

Summarize

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