Centos System Initialization Management script

System initialization script can be unified, automatic configuration, reduce manpower.

Here is a brief talk about Yum installation and source code compilation and installation, please correct me. I have been insisting on Yum installation for the following reasons

First, easy to install, do not need to spend more energy to consider the problem of dependency

Second, the configuration is unified, convenient later maintenance, automation and so on

Third, convenient upgrade

Four, okay, I'm a vegetable chicken, I admit it. 650) this.width=650; "src=" Http://img.baidu.com/hi/jx2/j_0039.gif "alt=" J_0039.gif "style=" Padding:0px;margin : 0px;vertical-align:top;border:none; "/>

#!/bin/sh# determine user identity username= ' whoami ';if [  $username  !=  "root"  ]then     echo  "Insufficient current user rights, will exit script";     exit 2;fi# verify user Network echo  "detect network ...";/bin/ping  www.baidu.com -c 2 >> /dev/nullif [ $? != 0 ]then     echo  "Network does not communicate properly, please check the network configuration";    exit 3;fiecho  "Network normal"; sleep 1; #安装yum  remi php Source if rpm -qa|grep remi-release >> /dev/ null;then    echo  "remi resource is installed"; elseyum_changes= "a"; version= ' cat /etc/issue|head -n 1|awk {' print $3 '}|tr  '. "   "\ n" |head -n 1 ' if [  $version  == 5 ]then    rpm  -uvh http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm http:// rpms.famillecollet.com/enterprise/remi-release-5.rpm 2>&1 >> /tmp/sys_log.txt    elif [  $version  == 6  ]then    rpm -uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/ Epel-release-6-8.noarch.rpm http://rpms.famillecollet.com/enterprise/remi-release-6.rpm 2>&1  >> /tmp/sys_log.txtfiif [ $? != 0 ]then    echo   "Failed to install yum  source, please check the log under TMP";else    echo  "yum source has been installed, please configure the Remi Source configuration file, choose PHP Version"; Fifi# asks the user whether to close selinuxselinux_st= ' sestatus | awk {' print $3 '} ' if [  $selinux _st  !=  "Disabled"  ]then    se_changes= "a";     until [   $se _changes ==  "yes"  ] && [  $se _changes ==  "no"  ]     do        read -p  "The current SELinux status is open, Whether to close (enter Yes to close, enter no not to close): "Se_changes    done    if [  $se _changes ==  "yes"  ]     then        sed -i  ' s/^selinux= Enforcing$/selinux=disables/'  /etc/selinux/config 2>&1 >> /tmp/sys_log.txt         if [$? != 0]         then            echo  " To close the SELinux error, please check the log under TMP ";         fi    elif [   $se _changes ==  "No"  ]    then         echo  "You have chosen not to turn off SELinux";    fielse    echo  " The selinux was detected to be closed "; fi

Let's say the script's business logic:

1. Determine user identity [non-root exit script]

2. Detect if the server network is healthy [error exit script]

3. Installing the Remi Yum Source

4. Turn off SELinux

5. Close Iptables

6. Change the SSH port

7. Changing Linux network kernel parameters

#其中关闭iptables, change the SSH port, change the Linux network kernel parameters, temporarily do not write logic code, the weekend will be updated on

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Centos System Initialization Management script