Centos is automatically modified to the source shell script

The following script can automatically identify whether the Centos version is 5, 6, or 7, and add different versions of the source

#! /Bin/bash
 
ARCH = '/usr/bin/getconf LONG_BIT'
REPOD = "/etc/yum. repos. d"
OSVER = '/bin/awk-F "[.]"' {print $3} '/etc/redhat-release'
OSVER7 = '/bin/awk-F "[.]"' {print $4} '/etc/redhat-release'
If ["$ (ls-A $ REPOD)"]; then
[-D $ {REPOD}/repos. old] |/bin/mkdir $ {REPOD}/repos. old
/Bin/mv $ {REPOD}/*. repo $ {REPOD}/repos. old/-f
Fi
 
If [$ {ARCH} x = 64x-a $ {OSVER} x = 5x]; then
/Bin/cat >$ {REPOD}/CentOS-Base.repo <EOF
[Base]
Name = CentOS-\ $ releasever-Base
Base url = http://xx.xx.xx.xx/5/ OS /x86_64
Gpgcheck = 0
 
[Updates]
Name = CentOS-\ $ releasever-Updates
Base url = http://xx.xx.xx.xx/5/updates/x86_64
Gpgcheck = 0
 
[Extras]
Name = CentOS-\ $ releasever-Extras
Base url = http://xx.xx.xx.xx/5/extras/x86_64
Gpgcheck = 0
EOF
 
Elif [$ {ARCH} x = 64x-a $ {OSVER} x = 6x]; then
/Bin/cat >$ {REPOD}/CentOS-Base.repo <EOF
[Base]
Name = CentOS-\ $ releasever-Base
Base url = http://xx.xx.xx.xx/6/ OS /x86_64
Gpgcheck = 0
 
[Updates]
Name = CentOS-\ $ releasever-Updates
Base url = http://xx.xx.xx.xx/6/updates/x86_64
Gpgcheck = 0
 
[Extras]
Name = CentOS-\ $ releasever-Extras
Base url = http://xx.xx.xx.xx/6/extras/x86_64
Gpgcheck = 0
EOF
 
Elif [$ {ARCH} x = 64x-a $ {OSVER7} x = 7x]; then
/Bin/cat >$ {REPOD}/CentOS-Base.repo <EOF
[Base]
Name = CentOS-\ $ releasever-Base
Base url = http://xx.xx.xx.xx/7/ OS /x86_64
Gpgcheck = 0
 
[Updates]
Name = CentOS-\ $ releasever-Updates
Base url = http://xx.xx.xx.xx/7/updates/x86_64
Gpgcheck = 0
 
[Extras]
Name = CentOS-\ $ releasever-Extras
Base url = http://xx.xx.xx.xx/7/extras/x86_64
Gpgcheck = 0
EOF
Else
Echo "only support CentOS [5/6/7]. x86_64"
Exit 1
Fi