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centos7初始化脚本

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2024-04-10 15:08

      
        
          

      
      
        
          #!/bin/bash
        
      
      
        
          # init centos7  ./centos7-init.sh 主机名
        
      
      
        
          

      
      
        
          # 检查是否为root用户，脚本必须在root权限下运行
        
      
      
        if [[ "$(whoami)" != "root" ]]; then
      
      
            echo "please run this script as root !" >&2
      
      
            exit 1
      
      
        
          fi
        
      
      
        echo -e "\033[31m the script only Support CentOS_7 x86_64 \033[0m"
      
      
        echo -e "\033[31m system initialization script, Please Seriously. press ctrl+C to cancel \033[0m"
      
      
        
          

      
      
        
          # 检查是否为64位系统，这个脚本只支持64位脚本
        
      
      
        platform=`uname -i`
      
      
        if [ $platform != "x86_64" ];then
      
      
            echo "this script is only for 64bit Operating System !"
      
      
            exit 1
      
      
        
          fi
        
      
      
        
          

      
      
        if [ "$1" == "" ];then
      
      
            echo "The host name is empty."
      
      
            exit 1
      
      
        
          else
        
      
      
            hostnamectl  --static set-hostname  $1
      
      
            hostnamectl  set-hostname  $1
      
      
        
          fi
        
      
      
        
          

      
      
        cat << EOF
      
      
        +---------------------------------------+
      
      
        |   your system is CentOS 7 x86_64      |
      
      
        |           start optimizing            |
      
      
        +---------------------------------------+
      
      
        EOF
      
      
        sleep 1
      
      
        
          

      
      
        
          # 安装必要支持工具及软件工具
        
      
      
        yum_update(){
      
      
        yum update -y
      
      
        yum install -y nmap unzip wget vim lsof xz net-tools iptables-services ntpdate ntp-doc psmisc
      
      
        }
      
      
        
          

      
      
        
          # 设置时间同步 set time
        
      
      
        zone_time(){
      
      
        timedatectl set-timezone Asia/Shanghai
      
      
        /usr/sbin/ntpdate 0.cn.pool.ntp.org > /dev/null 2>&1
      
      
        /usr/sbin/hwclock --systohc
      
      
        /usr/sbin/hwclock -w
      
      
        cat > /var/spool/cron/root << EOF
      
      
        10 0 * * * /usr/sbin/ntpdate 0.cn.pool.ntp.org > /dev/null 2>&1
      
      
        * * * * */1 /usr/sbin/hwclock -w > /dev/null 2>&1
      
      
        EOF
      
      
        chmod 600 /var/spool/cron/root
      
      
        /sbin/service crond restart
      
      
        sleep 1
      
      
        }
      
      
        
          

      
      
        
          # 修改文件打开数 set the file limit
        
      
      
        limits_config(){
      
      
        cat > /etc/rc.d/rc.local << EOF
      
      
        
          #!/bin/bash
        
      
      
        
          

      
      
        touch /var/lock/subsys/local
      
      
        ulimit -SHn 1024000
      
      
        EOF
      
      
        
          

      
      
        sed -i "/^ulimit -SHn.*/d" /etc/rc.d/rc.local
      
      
        echo "ulimit -SHn 1024000" >> /etc/rc.d/rc.local
      
      
        
          

      
      
        sed -i "/^ulimit -s.*/d" /etc/profile
      
      
        sed -i "/^ulimit -c.*/d" /etc/profile
      
      
        sed -i "/^ulimit -SHn.*/d" /etc/profile
      
      
        
          

      
      
        cat >> /etc/profile << EOF
      
      
        ulimit -c unlimited
      
      
        ulimit -s unlimited
      
      
        ulimit -SHn 1024000
      
      
        EOF
      
      
        
          

      
      
        source /etc/profile
      
      
        ulimit -a
      
      
        cat /etc/profile | grep ulimit
      
      
        
          

      
      
        if [ ! -f "/etc/security/limits.conf.bak" ]; then
      
      
            cp /etc/security/limits.conf /etc/security/limits.conf.bak
      
      
        
          fi
        
      
      
        
          

      
      
        cat > /etc/security/limits.conf << EOF
      
      
        * soft nofile 1024000
      
      
        * hard nofile 1024000
      
      
        * soft nproc  1024000
      
      
        * hard nproc  1024000
      
      
        hive   - nofile 1024000
      
      
        hive   - nproc  1024000
      
      
        EOF
      
      
        
          

      
      
        if [ ! -f "/etc/security/limits.d/20-nproc.conf.bak" ]; then
      
      
            cp /etc/security/limits.d/20-nproc.conf /etc/security/limits.d/20-nproc.conf.bak
      
      
        
          fi
        
      
      
        
          

      
      
        cat > /etc/security/limits.d/20-nproc.conf << EOF
      
      
        *          soft    nproc     409600
      
      
        root       soft    nproc     unlimited
      
      
        EOF
      
      
        
          

      
      
        sleep 1
      
      
        }
      
      
        
          

      
      
        
          # 优化内核参数 tune kernel parametres
        
      
      
        sysctl_config(){
      
      
        if [ ! -f "/etc/sysctl.conf.bak" ]; then
      
      
            cp /etc/sysctl.conf /etc/sysctl.conf.bak
      
      
        
          fi
        
      
      
        
          

      
      
        
          #add
        
      
      
        cat > /etc/sysctl.conf << EOF
      
      
        net.ipv6.conf.all.disable_ipv6 = 1
      
      
        net.ipv6.conf.default.disable_ipv6 = 1
      
      
        net.ipv4.tcp_syn_retries = 1
      
      
        net.ipv4.tcp_synack_retries = 1
      
      
        net.ipv4.tcp_keepalive_time = 600
      
      
        net.ipv4.tcp_keepalive_probes = 3
      
      
        net.ipv4.tcp_keepalive_intvl =15
      
      
        net.ipv4.tcp_retries1 = 3
      
      
        net.ipv4.tcp_retries2 = 5
      
      
        net.ipv4.tcp_fin_timeout = 10
      
      
        net.ipv4.tcp_tw_recycle = 1
      
      
        net.ipv4.tcp_tw_reuse = 1
      
      
        net.ipv4.tcp_syncookies = 1
      
      
        net.ipv4.tcp_window_scaling = 1
      
      
        net.ipv4.tcp_max_tw_buckets = 60000
      
      
        net.ipv4.tcp_max_orphans = 32768
      
      
        net.ipv4.tcp_max_syn_backlog = 16384
      
      
        net.ipv4.tcp_mem = 94500000 915000000 927000000
      
      
        net.ipv4.tcp_wmem = 4096 16384 13107200
      
      
        net.ipv4.tcp_rmem = 4096 87380 17476000
      
      
        net.ipv4.ip_local_port_range = 1024 65000
      
      
        net.ipv4.ip_forward = 1
      
      
        net.ipv4.route.gc_timeout = 100
      
      
        net.core.somaxconn = 32768
      
      
        net.core.netdev_max_backlog = 32768
      
      
        net.nf_conntrack_max = 6553500
      
      
        net.netfilter.nf_conntrack_max = 6553500
      
      
        net.netfilter.nf_conntrack_tcp_timeout_established = 180
      
      
        vm.overcommit_memory = 1
      
      
        vm.swappiness = 1
      
      
        fs.file-max = 1024000
      
      
        EOF
      
      
        
          

      
      
        
          #reload sysctl
        
      
      
        /sbin/sysctl -p
      
      
        sleep 1
      
      
        }
      
      
        
          

      
      
        
          # 设置UTF-8   LANG="zh_CN.UTF-8"
        
      
      
        LANG_config(){
      
      
        echo "LANG=\"en_US.UTF-8\"">/etc/locale.conf
      
      
        source  /etc/locale.conf
      
      
        }
      
      
        
          

      
      
        
          

      
      
        
          #关闭SELINUX disable selinux
        
      
      
        selinux_config(){
      
      
        sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
      
      
        setenforce 0
      
      
        sleep 1
      
      
        }
      
      
        
          

      
      
        
          #日志处理
        
      
      
        log_config(){
      
      
        setenforce 0
      
      
        systemctl start systemd-journald
      
      
        systemctl status systemd-journald
      
      
        }
      
      
        
          

      
      
        
          

      
      
        
          # 关闭防火墙
        
      
      
        firewalld_config(){
      
      
        /usr/bin/systemctl stop  firewalld.service
      
      
        /usr/bin/systemctl disable  firewalld.service
      
      
        }
      
      
        
          

      
      
        
          

      
      
        
          # SSH配置优化 set sshd_config
        
      
      
        sshd_config(){
      
      
        if [ ! -f "/etc/ssh/sshd_config.bak" ]; then
      
      
            cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bak
      
      
        
          fi
        
      
      
        
          

      
      
        cat >/etc/ssh/sshd_config<<EOF
      
      
        Port 22
      
      
        AddressFamily inet
      
      
        ListenAddress 0.0.0.0
      
      
        Protocol 2
      
      
        HostKey /etc/ssh/ssh_host_rsa_key
      
      
        HostKey /etc/ssh/ssh_host_ecdsa_key
      
      
        HostKey /etc/ssh/ssh_host_ed25519_key
      
      
        SyslogFacility AUTHPRIV
      
      
        PermitRootLogin yes
      
      
        MaxAuthTries 6
      
      
        RSAAuthentication yes
      
      
        PubkeyAuthentication yes
      
      
        AuthorizedKeysFile    .ssh/authorized_keys
      
      
        PasswordAuthentication yes
      
      
        ChallengeResponseAuthentication no
      
      
        UsePAM yes
      
      
        UseDNS no
      
      
        X11Forwarding yes
      
      
        UsePrivilegeSeparation sandbox
      
      
        AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
      
      
        AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
      
      
        AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
      
      
        AcceptEnv XMODIFIERS
      
      
        Subsystem       sftp    /usr/libexec/openssh/sftp-server
      
      
        EOF
      
      
        /sbin/service sshd restart
      
      
        }
      
      
        
          

      
      
        
          

      
      
        
          # 关闭ipv6  disable the ipv6
        
      
      
        ipv6_config(){
      
      
        echo "NETWORKING_IPV6=no">/etc/sysconfig/network
      
      
        echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
      
      
        echo 1 > /proc/sys/net/ipv6/conf/default/disable_ipv6
      
      
        echo "127.0.0.1   localhost   localhost.localdomain">/etc/hosts
      
      
        
          #sed -i 's/IPV6INIT=yes/IPV6INIT=no/g' /etc/sysconfig/network-scripts/ifcfg-enp0s8
        
      
      
        
          

      
      
        
          

      
      
        for line in $(ls -lh /etc/sysconfig/network-scripts/ifcfg-* | awk -F '[ ]+' '{print $9}')
      
      
        
          do
        
      
      
        if [ -f  $line ]
      
      
                then
      
      
                sed -i 's/IPV6INIT=yes/IPV6INIT=no/g' $line
      
      
                        echo $i
      
      
        
          fi
        
      
      
        
          done
        
      
      
        }
      
      
        
          

      
      
        
          

      
      
        
          # 设置历史命令记录格式 history
        
      
      
        history_config(){
      
      
        export HISTFILESIZE=10000000
      
      
        export HISTSIZE=1000000
      
      
        export PROMPT_COMMAND="history -a"
      
      
        export HISTTIMEFORMAT="%Y-%m-%d_%H:%M:%S "
      
      
        
          ##export HISTTIMEFORMAT="{\"TIME\":\"%F %T\",\"HOSTNAME\":\"\$HOSTNAME\",\"LI\":\"\$(who -u am i 2>/dev/null| awk '{print \$NF}'|sed -e 's/[()]//g')\",\"LU\":\"\$(who am i|awk '{print \$1}')\",\"NU\":\"\${USER}\",\"CMD\":\""
        
      
      
        cat >>/etc/bashrc<<EOF
      
      
        alias vi='vim'
      
      
        HISTDIR='/var/log/command.log'
      
      
        if [ ! -f \$HISTDIR ];then
      
      
        touch \$HISTDIR
      
      
        chmod 666 \$HISTDIR
      
      
        
          fi
        
      
      
        export HISTTIMEFORMAT="{\"TIME\":\"%F %T\",\"IP\":\"\$(ip a | grep -E '192.168|172' | head -1 | awk '{print \$2}' | cut -d/ -f1)\",\"LI\":\"\$(who -u am i 2>/dev/null| awk '{print \$NF}'|sed -e 's/[()]//g')\",\"LU\":\"\$(who am i|awk '{print \$1}')\",\"NU\":\"\${USER}\",\"CMD\":\""
      
      
        export PROMPT_COMMAND='history 1|tail -1|sed "s/^[ ]\+[0-9]\+  //"|sed "s/$/\"}/">> /var/log/command.log'
      
      
        EOF
      
      
        source /etc/bashrc
      
      
        }
      
      
        
          

      
      
        
          # 服务优化设置
        
      
      
        service_config(){
      
      
        /usr/bin/systemctl enable NetworkManager-wait-online.service
      
      
        /usr/bin/systemctl start NetworkManager-wait-online.service
      
      
        /usr/bin/systemctl stop postfix.service
      
      
        /usr/bin/systemctl disable postfix.service
      
      
        chmod +x /etc/rc.local
      
      
        chmod +x /etc/rc.d/rc.local
      
      
        
          #ls -l /etc/rc.d/rc.local
        
      
      
        }
      
      
        
          

      
      
        
          # VIM设置
        
      
      
        vim_config(){
      
      
        cat > /root/.vimrc << EOF
      
      
        set history=1000
      
      
        
          

      
      
        EOF
      
      
        
          

      
      
        
          #autocmd InsertLeave * se cul
        
      
      
        
          #autocmd InsertLeave * se nocul
        
      
      
        
          #set nu
        
      
      
        
          #set bs=2
        
      
      
        
          #syntax on
        
      
      
        
          #set laststatus=2
        
      
      
        
          #set tabstop=4
        
      
      
        
          #set go=
        
      
      
        
          #set ruler
        
      
      
        
          #set showcmd
        
      
      
        
          #set cmdheight=1
        
      
      
        
          #hi CursorLine   cterm=NONE ctermbg=blue ctermfg=white guibg=blue guifg=white
        
      
      
        
          #set hls
        
      
      
        
          #set cursorline
        
      
      
        
          #set ignorecase
        
      
      
        
          #set hlsearch
        
      
      
        
          #set incsearch
        
      
      
        
          #set helplang=cn
        
      
      
        }
      
      
        
          

      
      
        
          

      
      
        
          # done
        
      
      
        done_ok(){
      
      
        touch /var/log/init-ok
      
      
        cat << EOF
      
      
        +-------------------------------------------------+
      
      
        |               optimizer is done                 |
      
      
        |   it's recommond to restart this server !       |
      
      
        |             Please Reboot system                |
      
      
        +-------------------------------------------------+
      
      
        EOF
      
      
        }
      
      
        
          

      
      
        # main
      
      
        main(){
      
      
            yum_update
      
      
            zone_time
      
      
            limits_config
      
      
            sysctl_config
      
      
            LANG_config
      
      
            selinux_config
      
      
            log_config
      
      
            firewalld_config
      
      
            sshd_config
      
      
            ipv6_config
      
      
            history_config
      
      
            service_config
      
      
            vim_config
      
      
            done_ok
      
      
        }
      
      
        main
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