安装好CentOS系统之后，我们需要对环境进行一些基本的配置，让Linux更好用
写在前面
注意：本文章是针对arm32的CentOS7进行配置的，其他系统或不同架构不要尝试。
配置yum镜像源
1、首先让我们切换到root
su root
2、进入配置文件所在目录
cd /etc/yum.repos.d/
3、以防万一先备份，其实没必要
mv CentOS-Base.repo CentOS-Base.repo.bak
4、使用vi命令编辑CentOS-Base.repo文件
vi CentOS-Base.repo
替换为下面的内容
# CentOS-Base.repo
#
# The mirror system uses the connecting IP address of the client and the
# update status of each mirror to pick mirrors that are updated to and
# geographically close to the client. You should use this for CentOS updates
# unless you are manually picking other mirrors.
#
# If the mirrorlist= does not work for you, as a fall back you can try the
# remarked out baseurl= line instead.
#
#
[base]
name=CentOS-$releasever - Base
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
baseurl=http://mirrors.ustc.edu.cn/centos-altarch/$releasever/os/$basearch/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-AltArch-Arm32
#released updates
[updates]
name=CentOS-$releasever - Updates
# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
baseurl=http://mirrors.ustc.edu.cn/centos-altarch/$releasever/updates/$basearch/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-AltArch-Arm32
#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
baseurl=http://mirrors.ustc.edu.cn/centos-altarch/$releasever/extras/$basearch/
gpgcheck=1
enabled=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-AltArch-Arm32
#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
# mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
baseurl=http://mirrors.ustc.edu.cn/centos-altarch/$releasever/centosplus/$basearch/
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7
file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-SIG-AltArch-Arm32
5、设置缓存，并更新镜像配置
yum makecache
yum -y update
安装 wget 命令
1、yum安装
yum -y install wget
2、rpm安装
wget的rpm包下载：点击下载
推荐Package镜像地址：http://mirrors.nju.edu.cn/centos-altarch/7/os/aarch64/Packages/
可以将rpm包放到挂载的目录，在系统中用mv移动工作目录
mv /mnt/linux-share/wget-1.14-18.el7_6.1.aarch64.rpm /home/sw-code/ # 注意自己的
安装rpm包
rpm ivh wget-1.14-18.el7_6.1.aarch64.rpm
安装 lsof 命令
1、安装
yum -y install lsof
2、使用lsof查看端口占用情况
lsof -i tcp:80
可能用到的命令
1、top显示当前系统正在执行的进程的相关信息，包括进程ID、内存占用率、CPU占用率等
top
2、查看分区和磁盘
lsblk
3、查看空间使用情况
df -h
4、查看内存大小
free -h