基础备忘

由图可知：1颗物理CPU，双核4线程；
[root@test opt]#  cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l
1
[root@test opt]#  cat /proc/cpuinfo | grep "core id" | sort | uniq | wc -l
2
[root@test opt]#  cat /proc/cpuinfo | grep "processor" | sort | uniq | wc -l
4

基础组件安装：
yum -y install wget zip unzip git vim lrzsz net-tools.x86_64 ntpdate

[https://opsx.alibaba.com/mirror](https://opsx.alibaba.com/mirror)

下载新的CentOS-Base.repo 到/etc/yum.repos.d/
CentOS 6

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
或者

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
CentOS 7

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
或者

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

之后运行yum makecache生成缓存

生成密钥：
[root@nginx001 ~]# ssh-keygen  -t rsa

拷贝到远程主机命令： 
ssh-copy-id -i ~/.ssh/id_rsa.pub <romte_ip>