How does Centos7 use commands to directly change the contents of the configuration file

environment:

Centos7.7

Problem Description:

How does Centos7 use commands to directly change the contents of the configuration file

The DNS in the ifcfg-bond1 file wants to be replaced and changed to 114

solution:

1. Use the sed command

sed -i -e "s:匹配参数=.*:匹配参数=替换后的内容:g" 对应的文件路径

This case order

sed -i -e "s:DNS=.*:DNS=114.114.114.114:g" /etc/sysconfig/network-scripts/ifcfg-bond1

Original content

changed

2. Script

1.sh脚本

#!/bin/bash
TEST_CONF=/etc/sysconfig/network-scripts/ifcfg-bond1
sed -i -e "s:DNS=.*:DNS=114.114.114.114:g" ${TEST_CONF}

echo "ok success!"