centos 系统初始化

时间:2022-06-19 14:44:50

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