CentOS6.X系统初始化脚本

Posted 2020-09-15

#!/bin/bash

. /etc/init.d/functions

# Defined result function

function Msg(){

        if [ $? -eq 0 ];then

          action "$1" /bin/true

        else

          action "$1" /bin/false

        fi

}

# Defined IP function

function ConfigIP(){

Suffix1="$1"

Suffix2="$2"

        sed -ri "s#(IPADDR=)(.*)#\1$Suffix1#" /etc/sysconfig/network-scripts/ifcfg-eth0

        ifdown eth0 && ifup eth0

Msg "config eth0"

        sed -ri "s#(IPADDR=)(.*)#\1$Suffix2#" /etc/sysconfig/network-scripts/ifcfg-eth1

        ifdown eth1 && ifup eth1

        Msg "config eth1"

}

# Defined Yum source Functions

function yum(){

YumDir=/etc/yum.repos.d

        wget -O $YumDir/epel.repo http://mirrors.aliyun.com/repo/epel-6.repo

Msg "YUM source"

}

# Defined Close selinux Functions

function selinux(){

[ -f "/etc/selinux/config" ] && {

sed -i ‘s#SELINUX=enforcing#SELINUX=disabled#g‘ /etc/selinux/config

        setenforce 0

Msg "Close selinux"

} || Msg "Close selinux"

}

# Defined Close iptables Functions

function iptablesOff(){

        /etc/init.d/iptables stop

        chkconfig iptables off

}

# Defined add Ordinary users Functions

function AddUser(){

useradd oldboy &>/dev/null &&\

echo "123456"|passwd --stdin oldboy &>/dev/null &&\

sed  -i ‘98a oldboy    ALL=(ALL)       NOPASSWD:ALL‘  /etc/sudoers &&\

visudo -c &>/dev/null

Msg "AddUser oldboy"

}

# Defined Hide the system version number Functions

function HideVersion(){

[ -f "/etc/issue" ] && >/etc/issue

        Msg "Hide issue"

[ -f "/etc/issue.net" ] && > /etc/issue.net

        Msg "Hide issue.net"

}

# Defined SSHD config Functions

function sshd(){

SshdDir=/etc/ssh

[ -f "$SshdDir/sshd_config" ] && \

        sed -i.bak ‘s#GSSAPIAuthentication yes#GSSAPIAuthentication no#g;[email protected]#UseDNS [email protected] [email protected]‘ $SshdDir/sshd_config

        Msg "sshd config"

}

# Defined OPEN FILES Functions

function openfiles(){

[ -f "/etc/security/limits.conf" ] && {

echo ‘*  -  nofile  65535‘ >> /etc/security/limits.conf

        Msg "open files"

}

}

# Defined System Startup Services Functions

function boot(){

for i in `chkconfig --list|grep "3:on"|awk ‘{print $1}‘|egrep -v "crond|network|rsyslog|sshd|sysstat"`

 do 

  chkconfig $i off

done

Msg "BOOT config"

}

# Defined Time Synchronization Functions

function Time(){

echo "#time sync by $(whoami) at $(date +%F)" >>/var/spool/cron/root

echo ‘*/5 * * * * /usr/sbin/ntpdate ntp1.aliyun.com &>/dev/null‘ >>/var/spool/cron/root

        Msg "Time Synchronization"

}

# Defined main Functions

function main(){

        iptablesOff

        selinux

        [ ! -z "$1" -a ! -z "$2" ] && ConfigIP "$1" "$2"

AddUser

HideVersion

sshd

openfiles

boot

Time

        yum

}

main "$1" "$2"