阿里云云服务器Linux系统更新yum源Shell脚本

所有执行的脚本都需要root身份来执行，执行方法：以root身份执行命令：bash xxx.sh

功能：自动检测系统并更新源
适用系统版本：兼容线上所有linux版本
执行方法：以root身份执行命令：bash update_source.sh
解决了什么问题：一键式检测系统并更新源
给客户带来了好处：用户只需执行该脚本一次即可自动检测系统并更新源。
备注：由于系统版本都有支持的周期所以部分源可能会出现不可用的情况，包括官方的源，这是正常情况

#!/bin/bash
#########################################
#Function:  update source
#Usage:    bash update_source.sh
#Author:   Customer service department
#Company:   Alibaba Cloud Computing
#Version:   2.0
#########################################

check_os_release()
{
 while true
 do
  os_release=$(grep "Red Hat Enterprise Linux Server release" /etc/issue 2>/dev/null)
  os_release_2=$(grep "Red Hat Enterprise Linux Server release" /etc/redhat-release 2>/dev/null)
  if [ "$os_release" ] && [ "$os_release_2" ]
  then
   if echo "$os_release"|grep "release 5" >/dev/null 2>&1
   then
    os_release=redhat5
    echo "$os_release"
   elif echo "$os_release"|grep "release 6" >/dev/null 2>&1
   then
    os_release=redhat6
    echo "$os_release"
   else
    os_release=""
    echo "$os_release"
   fi
   break
  fi
  os_release=$(grep "Aliyun Linux release" /etc/issue 2>/dev/null)
  os_release_2=$(grep "Aliyun Linux release" /etc/aliyun-release 2>/dev/null)
  if [ "$os_release" ] && [ "$os_release_2" ]
  then
   if echo "$os_release"|grep "release 5" >/dev/null 2>&1
   then
    os_release=aliyun5
    echo "$os_release"
   elif echo "$os_release"|grep "release 6" >/dev/null 2>&1
   then
    os_release=aliyun6
    echo "$os_release"
   else
    os_release=""
    echo "$os_release"
   fi
   break
  fi
  os_release=$(grep "CentOS release" /etc/issue 2>/dev/null)
  os_release_2=$(grep "CentOS release" /etc/*release 2>/dev/null)
  if [ "$os_release" ] && [ "$os_release_2" ]
  then
   if echo "$os_release"|grep "release 5" >/dev/null 2>&1
   then
    os_release=centos5
    echo "$os_release"
   elif echo "$os_release"|grep "release 6" >/dev/null 2>&1
   then
    os_release=centos6
    echo "$os_release"
   else
    os_release=""
    echo "$os_release"
   fi
   break
  fi
  os_release=$(grep -i "ubuntu" /etc/issue 2>/dev/null)
  os_release_2=$(grep -i "ubuntu" /etc/lsb-release 2>/dev/null)
  if [ "$os_release" ] && [ "$os_release_2" ]
  then
   if echo "$os_release"|grep "Ubuntu 10" >/dev/null 2>&1
   then
    os_release=ubuntu10
    echo "$os_release"
   elif echo "$os_release"|grep "Ubuntu 12.04" >/dev/null 2>&1
   then
    os_release=ubuntu1204
    echo "$os_release"
   elif echo "$os_release"|grep "Ubuntu 12.10" >/dev/null 2>&1
   then
    os_release=ubuntu1210
    echo "$os_release"
   else
    os_release=""
    echo "$os_release"
   fi
   break
  fi
  os_release=$(grep -i "debian" /etc/issue 2>/dev/null)
  os_release_2=$(grep -i "debian" /proc/version 2>/dev/null)
  if [ "$os_release" ] && [ "$os_release_2" ]
  then
   if echo "$os_release"|grep "Linux 6" >/dev/null 2>&1
   then
    os_release=debian6
    echo "$os_release"
   else
    os_release=""
    echo "$os_release"
   fi
   break
  fi
  break
  done
}

modify_rhel5_yum()
{
 wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyuncs.com/repo/Centos-5.repo
 sed -i 's/aliyun/aliyuncs/g' /etc/yum.repos.d/CentOS-Base.repo
 sed -i 's/\$releasever/5/' /etc/yum.repos.d/CentOS-Base.repo
 yum clean metadata
 yum makecache
 cd ~
}

modify_rhel6_yum()
{
 wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyuncs.com/repo/Centos-6.repo
 sed -i 's/aliyun/aliyuncs/g' /etc/yum.repos.d/CentOS-Base.repo
 sed -i 's/\$releasever/6/' /etc/yum.repos.d/CentOS-Base.repo
 yum clean metadata
 yum makecache
 cd ~
}

update_ubuntu10_apt_source()
{
echo -e "\033[40;32mBackup the original configuration file,new name and path is /etc/apt/sources.list.back.\n\033[40;37m"
cp -fp /etc/apt/sources.list /etc/apt/sources.list.back
cat > /etc/apt/sources.list < /etc/apt/sources.list < /etc/apt/sources.list < /etc/apt/sources.list <