实验模板机制作以及配置常用软件和环境

当前版本

[root@osker ~]# cat /etc/redhat-release

CentOS Linux release 7.6.1810 (Core)

[root@osker ~]# uname -a

Linux osker 3.10.0-957.el7.x86_64 #1 SMP Thu Nov 8 23:39:32 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

 

配置阿里云yum仓库

rm -fr /etc/yum.repos.d/*

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

sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

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

 

 

安装常用软件

#参考软件： net-tools vim tree htop iftop iotop lrzsz sl wget unzip telnet nmap nc psmisc dos2unix bash-completion bash-completion-extras sysstat rsync nfs-utils httpd-tools ntpdate

[root@osker ~]# yum install -y ntpdate wget vim tree lsof net-tools lrzsz nmap dos2unix nc telnet bash-completion bash-completion-extras ncurses-devel libaio-devel autoconf gcc-c++ gcc glibc cmake

 

关闭防火墙

systemctl stop firewalld

systemctl disable firewalld

systemctl status firewalld

 

关闭SELinux

setenfore 0

vim /etc/selinux/conf

SELINUX=disabled

 

优化ssh远程连接

vim /etc/ssh/sshd_config

略

 

配置hosts主机解析

vim /etc/hosts

略

 

添加定时时间同步

[root@osker ~]# crontab -e

#rsyn time from aliyun ntpdate

*/5 * * * * /usr/sbin/ntpdate ntp1.aliyun.com &>/dev/null

 

扩大同时打开文件数量为65535

[root@osker ~]# echo '* - nofile 65535 ' >>/etc/security/limits.conf

[root@osker ~]# tail -1 /etc/security/limits.conf

* - nofile 65535

[root@osker ~]# reboot

[root@osker ~]# ulimit -a

core file size (blocks, -c) 0

...

open files (-n) 65535

...

 

修改字符集

[root@osker ~]# localectl set-locale LANG="en_US.UTF-8"

[root@osker ~]# echo $LANG

en_US.UTF-8

 

优化环境变量

[root@osker ~]# echo "PS1='[[e[33;40m]u[e[37;40m]@h [e[33;40m]w[e[0m]]\$ '" >> .bashrc

 

模板机配置完成，关机，添加快照。

 

 

 

使用链接克隆新机器，开机后修改主机名及IP 地址

 

修改主机名

[root@osker ~]# hostnamectl set-hostname backup

修改ip地址

[root@osker ~]# grep "100" /etc/sysconfig/network-scripts/ifcfg-ens3{3,7}

IPADDR=192.168.186.100

IPADDR=172.16.1.100

[root@osker ~]# sed -i 's#100#41#g' /etc/sysconfig/network-scripts/ifcfg-ens3{3,7}

[root@osker ~]# sed -i '/UUID/d' /etc/sysconfig/network-scripts/ifcfg-ens3{3,7}

 

关机，做快照。

[root@osker ~]# poweroff