centos 系统初始化

centos 系统初始化

#!/bin/bash
# author cfwl create date of 2012-10-21
# blog http://cfwlxf.blog.51cto.com
# source user shell variable
PATH=/sbin:/bin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin
export PATH
# Source system network library.
. /etc/sysconfig/network
# Source system function library.
. /etc/init.d/functions
SYSTEM_HOSTNAME(){
        # Source system network library.
        . /etc/sysconfig/network
        # Update name of system host
        printf "\033[33mplease input system host name:\033[0m " STR
        read STR
        # Judge system hostname
        hostname $STR
        sed -i "s/HOSTNAME=$HOSTNAME/HOSTNAME=$STR/" /etc/sysconfig/network
        # Judge system hostname if equal user input name
        HOSTNAME=$(awk -F '=' '/HOSTNAME/{print $2}' /etc/sysconfig/network)
        if [ "$HOSTNAME" = "$STR" ]
                then
                        sleep 2
                        printf "\033[35msystem host name is update by: $STR\033[0m $str\n"
                else
                        printf "\033[35msystem host name is not update\033[0m\n"
                        exit 0
        fi
}
# Update System SSH Service Port
SYSTEM_SSH_PORT(){
        SSH_CONFIG=/etc/ssh/sshd_config
        #Backup SSH configuration
        cp -a ${SSH_CONFIG} ${SSH_CONFIG}.save
        #Chage SSH server of port
        sed -i '/^#Port/s/#Port 22/Port 65535/g' $SSH_CONFIG
        sed -i '/^#UseDNS/s/#UseDNS yes/UseDNS no/g' $SSH_CONFIG
        sed -i 's/#PermitRootLogin yes/PermitRootLogin no/g' $SSH_CONFIG
        sed -i 's/#PermitEmptyPasswords no/PermitEmptyPasswords no/g' $SSH_CONFIG
        sleep 2
        #Prompt user if restart SSH service
        printf "\033[32myou need to restart the SSH service,configuration to take effect.
                       1> Input \"y\", Now restart to SSH service.
                       2> Input \"n\", Later in the manual restart.
Please input string \"y/n\": \033[0m"  RETVAL
        read RETVAL
        [ "$RETVAL" = "y" ] && sleep 2 && /etc/init.d/sshd restart
        [ "$RETVAL" = "n" ] && sleep 2 && action "Later on please manual restart SSH service" true
}
# Close system Selinux and iptables function
SYSTEM_IPV4_FORWARD(){
        #Close syetem selinux and iptalbes forward
        sed -i '/^SELINUX/s/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
        RETVAL=$(awk -F '=' '/^SELINUX=/{print $NF}' /etc/selinux/config)
        [ "$RETVAL" = "disabled" ] && sleep 1 && printf "\033[36mSelinux Change [$RETVAL], please restart system by tack effect.\033[0m\n"
        sleep 2
        #Close syetem iptables forward
        /etc/init.d/iptables stop && chkconfig iptables off
}
#Optimizing The System Service and Rsync System Time
CLOSE_SYSTEM_SERVER(){
        #Stop All System Serivce
        for server in `chkconfig --list | awk '{print $1}'`;do chkconfig $server off;done
        #Start Up Assign System Service
        for server in sshd messagebus rngd network crond rsyslog irqbalance;do chkconfig --level 35 $server on;done
        #Print modify alter of service
        RETVAL=$(chkconfig --list | egrep '3:on|5:on' | awk '{print $1}' | xargs)
        printf "\033[35mPrint current system auto start of server: $RETVAL\033[0m\n"
        #Rsync System Local Time
        RETVAL=$(rpm -qa ntp | wc -l)
        if [ $RETVAL = 1 ]
                then
                        echo "5 * * * * ntpdate ntp.api.bz > /dev/null 2>&1" >> /var/spool/cron/root
                else
                        yum install ntp
                        echo "5 * * * * ntpdate ntp.api.bz > /dev/null 2>&1" >> /var/spool/cron/root
        fi
}
#Update Yum Source
UPDATE_YUM_SOURCE(){
        # Judge YUM_BACK_DIR directory if exist
        getDT=`date -d "today" +"%Y%m%d_%H%M%S"`
        export getDT=$getDT

        YUM_BACK_DIR=/etc/yum.repos.d/backup_$getDT/
        YUM_DIR=/etc/yum.repos.d/
        [ ! -d ${YUM_BACK_DIR} ] && mkdir ${YUM_BACK_DIR}
        echo ${YUM_BACK_DIR}
        #sleep 1000s

        cd ${YUM_DIR}
        find . -type f -name "*.repo" | xargs mv -t ${YUM_BACK_DIR}
        RETVAL=0
        #Determine the return value if 0.
        [ $? = ${RETVAL} ] && printf "\033[32m
         1.Inland 163  yum source
         2.Inland sohu yum source
         Judge:please input install 163 or sohu  yum source:\033[0m" STR
        read STR
        case "$STR" in
           163)
                wget http://mirrors.163.com/.help/CentOS7-Base-163.repo
                RETVAL=0
                [ $? = ${RETVAL} ] && printf "\033[35mYum source is download successfully of 163 mirrors.\n\033[0m"
                sleep 2
                rpm --import http://mirror.centos.org/centos/RPM-GPG-KEY-CentOS-7
                yum update
                yum makecache
                ;;
          sohu)
                wget http://mirrors.sohu.com/help/CentOS-Base-sohu.repo
                RETVAL=0
                [ $? = ${RETVAL} ] && printf "\033[35mYum source is download successfully of sohu mirrors.\n\033[0m"
                sleep 2
                rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-*
                yum update
                yum makecache
                ;;
             *)
                echo -e "\033[31m Error: plase you input 163 or sohu.\033[0m"
                UPDATE_YUM_SOURCE
                exit 0
        esac
}
#By the user to enter the digital implementation corresponding function
echo -e "\033[32m ----------------------------------------------------------------------------------------------------------------
         |                              welcome to syetem initialize scripts                                            |
         ----------------------------------------------------------------------------------------------------------------
         |Judge: Scripts Can realize the function as follows:                                                           |
         |(1)Modification system host name .                                                                            |
         |(2)Close system SELINXU and iptables.                                                                         |
         |(3)Modification SSH service port as configure.                                                                |
         |(4)Close System Don't use of Service and update system time                                                   |
         |(5)Update System Yum Source                                                                                   |
         ----------------------------------------------------------------------------------------------------------------\033[0m"
read -p "Please according number input you want execute of function: " number
        case "$number" in
                1)
                    SYSTEM_HOSTNAME
                    RETVAL=0
                    [ $? = $RETVAL ] && action "System host name update successfully,please restart system." true
                    ;;
                2)
                    SYSTEM_IPV4_FORWARD
                    ;;
                3)
                    SYSTEM_SSH_PORT
                    RETVAL=0
                    [ $? = $RETVAL ] && action "Update System SSH Service Port already successfully." true
                    ;;
                4)
                    CLOSE_SYSTEM_SERVER
                    RETVAL=0
                    [ $? = $RETVAL ] && action "Initialize Sytem Service already successfully." true
                    ;;
                5)
                    UPDATE_YUM_SOURCE
                    RETVAL=0
                    [ $? = $RETVAL ] &&  action "Update System Yum Source already successfully." true
                    ;;
                *)
                    printf "\033[36mError: please you input prompt dialog box of number:1-5\033[0m\n"
                    ;;
        esac