安装完centos后的一些操作

修改DNS设置

vi /etc/resolv.conf

nameserver 114.114.114.114
nameserver 8.8.4.4

安装wget

yum -y install wget

修改为阿里源

备份本地yum源

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak

mv /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo  

获取阿里yum源配置文件

curl http://mirrors.aliyun.com/repo/Centos-7.repo -o /etc/yum.repos.d/CentOS-Base.repo

curl http://mirrors.aliyun.com/repo/epel-7.repo -o /etc/yum.repos.d/epel.repo

清理缓存

yum clean all

更新缓存

yum makecache 

更新

yum -y update

修改为清华源

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak

vi /etc/yum.repos.d/CentOS-Base.repo

# 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-$releasever - Base
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/os/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=os
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#released updates
[updates]
name=CentOS-$releasever - Updates
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/updates/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=updates
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful
[extras]
name=CentOS-$releasever - Extras
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/extras/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=extras
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages
[centosplus]
name=CentOS-$releasever - Plus
baseurl=https://mirrors.tuna.tsinghua.edu.cn/centos/$releasever/centosplus/$basearch/
#mirrorlist=http://mirrorlist.centos.org/?release=$releasever&arch=$basearch&repo=centosplus
gpgcheck=1
enabled=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

yum makecache

安装ifconfig

yum -y install net-tools.x86_64

安装python3

http://blog.meixiangdao.cn/Centos7安装Python3的方法.html

关闭自带防火墙

查看防火墙状态

firewall-cmd --state

停止firewall

systemctl stop firewalld.service

禁止firewall开机启动

systemctl disable firewalld.service 

安装 zsh

yum -y install zsh

wget https://raw.githubusercontent.com/skywind3000/vim/a368b047f97a0f4338a52236de8ace588ced8538/etc/zshrc.zsh

mv zshrc.zsh .zshrc

zsh

chsh -s /bin/zsh

设置 swap

创建一个 2G 大小的 swap 交换文件

fallocate -l 2G /swap

修改权限

chmod 0600 /swap

制作为swap格式文件：

mkswap /swap

再用swapon命令把这个文件分区挂载swap分区

swapon /swap

echo "/swap swap swap default 0 0" >> /etc/fstab