服务器优化脚本

#！/bin/bash
echo "关闭selinux"
    setenforce 0
    getenforce
    sed -i '7c SELINUX=disabled' /etc/selinux/config
 
echo "关闭firewalld"
    systemctl stop firewalld
    systemctl disable firewalld

echo "修改默认YUM源为阿里"
    mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
    curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo

echo "安装常用软件"
    yum -y install vim tree lrzsz ntpdate net-tools wget
    rpm -qa  vim tree lrzsz ntpdate net-tools wget

echo "安装epel源"
    wget -O /etc/yum.repos.d/epel.repo https://mirrors.aliyun.com/repo/epel-7.repo

echo "安装自动补全命令"
    yum -y install bash-completion.noarch bash-completion-extras.noarch

echo "时间同步"
    ntpdate ntp1.aliyun.com 
    hwclock -w 

echo "修改文件描述符"
    echo  "* - nofile 65535"  >> /etc/security/limits.conf

echo "关闭NetworkManagewr"
    systemctl stop NetworkManager
    systemctl disable NetworkManager 

echo "修改命令行颜色"
    echo "PS1='[\[\e[34;1m\]\u@\[\e[0m\]\[\e[32;1m\]\H\[\e[0m\]\[\e[31;1m\] \W\[\e[0m\]]# '" >> /root/.bashrc
    source /root/.bashrc

echo "服务器优化完毕"