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1. 系统初始化脚本

1. 系统初始化脚本

作者: 随便写写咯 | 来源:发表于2021-01-17 00:15 被阅读0次
    #!/bin/bash

#系统初始化脚本, 适用于CentOS[6&7&8]和Ubuntu

GREEN="echo -e \033[1;32m"
RED="echo -e \033[1;31m"
END="\033[0m"

DIS_VERSION=`[ -f /etc/os-release ] && sed -nr '1s/^NAME="(.*)"/\1/p' /etc/os-release 2> /dev/null`
#用来取发行版, CentOS 7,8,Ubuntu都适用, 如果不存在则为6. 因为,6没有/etc/os-release文件, 则默认判断为6
#如果是Ubuntu版本, 取出来的值为Ubuntu, 如果是CentOS版本, 取出来的值为CentOS Linux
#加了错误重定向, 是为了避免在CentOS 6上执行脚本时, 由于没有/etc/os-release文件, 会出现sed 找不到文件报错
OS_VERSION=`sed -nr '2p' /etc/os-release | tr -s ' ' | cut -d ' ' -f1 | cut -d '"' -f2`
#用来取操作系统版本, Ubuntu无需判断,因为已经通过DIS_VERSION和CentOS区分开来了, CentOS 7,8需要判断, CentOS 6用 ! [ -f /etc/os-release ] 判断
#如果是CentOS 7, 取出来的值为7; 如果是CentOS 8, 取出来的值为8

[ `whoami` = "root" ] || { exit 1; ${RED}Please switch to root account to run this script!!!${END}; }
${GREEN}Linux distribution is $DIS_VERSION${END}
${GREEN}OS system is $OS_VERSION${END}
#1. 修改主机名称

Setup_Hostname(){

if [ -f /etc/os-release ]; then

        while true; do

        read -p "Plese input Hostname (HOSTNAME.DOMAIN): " HOSTNAME

        case $HOSTNAME in

        *.*)
                hostnamectl set-hostname $HOSTNAME
                ${GREEN}Hostname has been changed to $HOSTNAME!${END}
                break
                ;;
        *)
                ${RED}Wrong Hostname Format, Must Be HOSTNAME.DOMAIN!${END}
        esac

        done

else

        while true; do

        read -p "Plese input Hostname (HOSTNAME.DOMAIN): " HOSTNAME

        case $HOSTNAME in

        *.*)
                sed -i.bak "s/^HOSTNAME=.*/HOSTNAME=$HOSTNAME/" /etc/sysconfig/network
                ${GREEN}Hostname has been changed to $HOSTNAME!${END}
                break
                ;;
        *)
                ${RED}Wrong Hostname Format, Must Be HOSTNAME.DOMAIN!${END}
        esac

        done
fi

}

#2. 修改命令提示符

CMD_PROMPT(){

echo 'PS1="\[\e[1;32m\][\t \[\e[1;33m\]\u\[\e[35m\]@\h\[\e[1;31m\] \w\[\e[1;32m\]]\[\e[0m\]\\$"' >> /etc/profile.d/env.sh

[ $? -eq 0 ] && ${GREEN}命令提示符修改成功！$END || ${RED}命令提示符修改失败！$END

}

#3. 修改vim格式

vim_style(){

cat > /root/.vimrc <<EOF
set ts=4
set expandtab
set ignorecase
set cursorline
set autoindent
autocmd BufNewFile *.sh exec ":call SetTitle()"
func SetTitle()
    if expand("%:e") == 'sh'
    call setline(1,"#!/bin/bash")
    call setline(2,"#")
    call setline(3,"#********************************************************************")
    call setline(4,"#Author:            David")
    call setline(5,"#QQ:                953260716")
    call setline(6,"#Date:              ".strftime("%Y-%m-%d"))
    call setline(7,"#FileName           ".expand("%"))
    call setline(8,"#URL:               https://www.wangxiaoning.com")
    call setline(9,"#Description        The test script")
    call setline(10,"#Copyright (C):     ".strftime("%Y")." All rights reserved")
    call setline(11,"#********************************************************************")
    call setline(12,"")
    endif
endfunc
autocmd BufNewFile * normal G
EOF

[ $? -eq 0 ] && ${GREEN}vim格式修改成功！$END || ${RED}vim格式修改失败！$END

}

#4. 修改PATH变量

Setup_PATH(){

! [ -d /data/scripts  ] && mkdir -p /data/scripts
! [ -d /data/pkgs  ] && mkdir -p /data/pkgs
! [ -d /data/prac  ] && mkdir -p /data/prac


echo 'PATH="/data/scripts:$PATH"' >> /etc/profile.d/env.sh

[ $? -eq 0 ] && ${GREEN}PATH变量修改成功！$END || ${RED}PATH变量修改失败！$END

}


#5. 修改网卡名称为eth0

change_eth0(){

if [ -f /etc/os-release ]; then
    
    if [ "${DIS_VERSION}" = Ubuntu ] ;then

        net_file=`ls /etc/netplan/`
        sed -i.bak '/GRUB_CMDLINE_LINUX=/s#"$# net.ifnames=0"#' /etc/default/grub
            grub-mkconfig -o /boot/grub/grub.cfg &> /dev/null
            sed -i 's/ens33/eth0/' /etc/netplan/$net_file
        [ $? -eq 0 ] && ${GREEN}net_int has been changed!${END} || ${RED}net_int change failed!!!${END} 
    #netplan apply, 该命令会使网卡配置文件立即生效, 不建议在初始化阶段执行, 会造成ssh中断  
    
    else 
        
    #CentOS 7&8 修改网卡名称方式一样
        
        sed -i.bak '/GRUB_CMDLINE_LINUX=/s#"$# net.ifnames=0"#' /etc/default/grub
        grub2-mkconfig -o /boot/grub2/grub.cfg &> /dev/null
        mv /etc/sysconfig/network-scripts/ifcfg-ens* /etc/sysconfig/network-scripts/ifcfg-eth0
        sed -ri 's/(NAME=).*/\1eth0/' /etc/sysconfig/network-scripts/ifcfg-eth0
        sed -ri 's/(DEVICE=).*/\1eth0/' /etc/sysconfig/network-scripts/ifcfg-eth0
        sed -i '/UUID/d' /etc/sysconfig/network-scripts/ifcfg-eth0      
        [ $? -eq 0 ] && ${GREEN}net_int has been changed!${END} || ${RED}net_int change failed!!!${END}
            
    fi

else

    {GREEN}CentOS 6 has eth0 as default, there is no need to chang{END}
    
fi
}


#6. 关闭和禁用防火墙

disable_firewall(){


if [ -f /etc/os-release ]; then
    
    if [ "${DIS_VERSION}" = Ubuntu ]; then 
    
        ufw disable &> /dev/null
        
        [ $? -eq 0 ] && ${GREEN}Firewall has been disabled!${END} || ${RED}Firewall disable failed!${END}
    
    else 
    
        systemctl disable --now firewalld &> /dev/null
        
        [ $? -eq 0 ] && ${GREEN}Firewall has been disabled!${END} || ${RED}Firewall disable failed!${END}
    
    fi

else
    
    chkconfig iptables off
    
    [ $? -eq 0 ] && ${GREEN}Firewall has been disabled!${END} || ${RED}Firewall disable failed!${END}

fi

}
    

#7. 禁用SElinux

#CentOS 6&7&8都适用; Ubuntu没有SElinux

Disable_SElinux(){

sed -i.bak 's#^SELINUX=enforcing#SELINUX=disabled#' /etc/selinux/config 

[ $? -eq 0 ] && ${GREEN}SElinux禁用成功！$END || ${RED}SElinux禁用失败！$END

}

#8. 制作阿里云yum源

mirrors_sources(){

if [ "${DIS_VERSION}" = 'Ubuntu' ];then
        apt_source=bionic
        cat > /etc/apt/sources.list <<EOF
deb http://mirrors.aliyun.com/ubuntu/ $apt_source main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ $apt_source main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ $apt_source-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ $apt_source-security main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ $apt_source-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ $apt_source-updates main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ $apt_source-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ $apt_source-proposed main restricted universe multiverse

deb http://mirrors.aliyun.com/ubuntu/ $apt_source-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ $apt_source-backports main restricted universe multiverse
EOF

[ $? -eq 0 ] && ${GREEN}apt repos has been changed!${END} || ${RED}yum repos change failed!!!${END}

elif ! [ -f /etc/os-release ];then
        rm -rf /etc/yum.repos.d/*
        cat > /etc/yum.repos.d/CentOS6.repo <<EOF
[BaseOS]
name=BaseOS
baseurl=https://mirrors.aliyun.com/centos/6/os/x86_64/
        https://mirrors.huaweicloud.com/centos/6/os/x86_64/
        https://mirrors.163.com/centos/6/os/x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6

[epel]
name=epel
baseurl=https://mirrors.aliyun.com/epel/6/x86_64/
        https://mirrors.huaweicloud.com/epel/6/x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-6

[extras]
name=extras
baseurl=https://mirrors.aliyun.com/centos/6/extras/x86_64/
        https://mirrors.huaweicloud.com/centos/6/extras/x86_64/
        https://mirrors.163.com/centos/6/extras/x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-6
EOF

[ $? -eq 0 ] && ${GREEN}yum repos has been changed!${END} || ${RED}yum repos change failed!!!${END}

elif [  ${OS_VERSION} -eq 7 ];then
        rm -rf /etc/yum.repos.d/*
        cat > /etc/yum.repos.d/CentOS7.repo <<EOF
[BaseOS]
name=BaseOS
baseurl=https://mirrors.aliyun.com/centos/7/os/x86_64/
        https://mirrors.huaweicloud.com/centos/7/os/x86_64/
        https://mirrors.163.com/centos/7/os/x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/7/os/x86_64/RPM-GPG-KEY-CentOS-7


[epel]
name=epel
baseurl=https://mirrors.aliyun.com/epel/7/x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-7

[extras]
name=extras
baseurl=https://mirrors.aliyun.com/centos/7/extras/x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official
EOF

[ $? -eq 0 ] && ${GREEN}yum repos has been changed!${END} || ${RED}yum repos change failed!!!${END}

else 
        rm -rf /etc/yum.repos.d/*
        cat > /etc/yum.repos.d/CentOS8.repo <<EOF
[BaseOS]
name=BaseOS
baseurl=https://mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/
        https://mirrors.huaweicloud.com/centos/8/BaseOS/x86_64/os/
        https://mirrors.163.com/centos/8/BaseOS/x86_64/os/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official

[AppStream]
name=AppStream
baseurl=https://mirrors.aliyun.com/centos/8/AppStream/x86_64/os/
        https://mirrors.huaweicloud.com/centos/8/AppStream/x86_64/os/
        https://mirrors.163.com/centos/8/AppStream/x86_64/os/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official


[epel]
name=epel
baseurl=https://mirrors.aliyun.com/epel/8/Everything/x86_64/
        https://mirrors.huaweicloud.com/epel/8/Everything/x86_64/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/epel/RPM-GPG-KEY-EPEL-8

[extras]
name=extras
baseurl=https://mirrors.aliyun.com/centos/8/extras/x86_64/os/
        https://mirrors.huaweicloud.com/centos/8/extras/x86_64/os/
        https://mirrors.163.com/centos/8/extras/x86_64/os/
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-Official
EOF

[ $? -eq 0 ] && ${GREEN}yum repos has been changed!${END} || ${RED}yum repos change failed!!!${END}

fi

}

#9. 安装常用软件

install_app(){

if [ -f /etc/os-release ]; then
    
    if [ "${DIS_VERSION}" = Ubuntu ]; then
        
        apt -y install vim curl  wget bash-completion net-tools lrzsz lsof tcpdump psmisc  &> /dev/null && ${GREEN}install successfully!${END} || ${RED}install failed!${END}
    
    elif [ ${OS_VERSION} -eq 7 ]; then 
    
        yum -y install vim-enhanced tcpdump lrzsz tree telnet bash-completion net-tools wget bzip2 lsof tmux man-pages zip unzip  gcc make gcc-c++ glibc glibc-devel pcre pcre-devel openssl  openssl-devel systemd-devel &> /dev/null && ${GREEN}install successfully!${END} || ${RED}install failed!${END}
        
    else
        
        yum -y install vim-enhanced tcpdump autofs lrzsz tree telnet ftp lftp redhat-lsb-core bash-completion net-tools postfix wget bzip2 lsof mlocate tmux man-pages &> /dev/null && ${GREEN}install successfully!${END} || ${RED}install failed!${END}

    fi

else
        yum -y install vim-enhanced tcpdump lrzsz tree telnet  net-tools wget bzip2 lsof  man-pages zip unzip  gcc make gcc-c++ glibc glibc-devel pcre pcre-devel openssl  openssl-devel &> /dev/null && ${GREEN}install successfully!${END} || ${RED}install failed!${END}
    
fi

}

#10. 创建别名

create_alias(){

    if [ "${DIR_VERSION}" = Ubuntu ];then
    net_file=`ls /etc/netplan/`    
    echo "alias apti='apt -y install'" >> /root/.bashrc
        echo alias vinet="vim $net_file" >> /root/.bashrc
        echo "alias scandisk='echo - - - > /sys/class/scsi_host/host0/scan;echo - - - > /sys/class/scsi_host/host1/scan;echo - - - > /sys/class/scsi_host/host2/scan'" >> /root/.bashrc
 
    else
    
        echo "alias vinet='vim /etc/sysconfig/network-scripts/ifcfg-eth0'" >> /root/.bashrc
        echo "alias yumi='yum -y install'" >> /root/.bashrc
        echo "alias yump='yum provides'" >> /root/.bashrc
        echo "alias scandisk='echo - - - > /sys/class/scsi_host/host0/scan;echo - - - > /sys/class/scsi_host/host1/scan;echo - - - > /sys/class/scsi_host/host2/scan'" >> /root/.bashrc

   fi

}

#开始

while true;do
cat <<EOF
0. 全来
1. 修改主机名称
2. 修改命令提示符
3. 修改vim格式
4. 修改PATH变量
5. 修改网卡名称为eth0
6. 关闭和禁用防火墙
7. 禁用SElinux
8. 制作阿里云yum源
9. 安装常用软件
10. 创建别名
11. 退出
EOF

    read -p "请选择你想要的操作(0-10): " INPUT
    
    case $INPUT in

    0)
        Setup_Hostname
    CMD_PROMPT
    vim_style
    Setup_PATH
    change_eth0
    disable_firewall
    Disable_SElinux
    mirrors_sources
    install_app
    create_alias
        ;;
    1)
        Setup_Hostname
        ;;
    2)
        CMD_PROMPT
        ;;
    3)
        vim_style
        ;;
    4)
    Setup_PATH
        ;;
    5)
        change_eth0
        ;;
    6)
        disable_firewall
        ;;
    7)
        Disable_SElinux
        ;;
    8)
        mirrors_sources
        ;;
    9)  
    install_app
        ;;
    10)
    create_alias
        ;;
    11)
        break
        ;;
    *)
        ${RED}请输入正确的数字${END}
    esac
done

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