安裝centos系統
1. 安裝centos系統
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我們開始安裝centos7系統
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第一步，配置centos7，選擇安裝
使用上下鍵選擇了，install Centos7后按tab鍵輸入，net.ifnames=0 biosdevname=0
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選擇語言和鍵盤格式
選擇默認就行
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手動配置一下磁盤
選擇 I will configure partitioning進行配置
點擊 click here to create them automatically進行配置
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配置磁盤
這里根據情況配置，swap根據一般為內存的2倍，/boot一般默認1024mib就行，剩下的都給根級目錄 "/"
點擊 Begin installation進行安裝
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設置root密碼
由於這里演示怎么安裝，這里密碼設置為123456，可以根據自己情況進行安裝，確認密碼后返回安裝界面
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安裝界面
點擊重啟，就到此安裝完成
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創建系統初始化test.sh腳本
[root@master ~]# vim system_Initialize.sh [root@master ~]# cat system_Initialize.sh #!/bin/sh #author:shichao #date:2018/08/02 #mail:shichao@scajy.cn [ -f /etc/init.d/functions ] && . /etc/init.d/functions ||exit function Basics(){ #安裝epel，源 echo "epel源安裝中，請稍等......" yum install epel-release -y > /dev/null 2>&1 echo "epel源安裝完成!" echo "gcc-c++,gcc,make等工具安裝中，請稍等......" yum -y install gcc gcc-c++ gd cmake patch automakemake autoconf libjpeg net-tools libjpeg-devel libpng libpng-devel freetype freetype-devellibxml2 libxml2-devel zlib zlib-devel glibc glibc-devel glib2 glib2-devel bzip2bzip2-devel ncurses ncurses-devel curl curl-devel e2fsprogs e2fsprogs-develkrb5 krb5-devel libidn libtools-libs libidn-devel openssl openssl-developenldap openldap-devel nss_ldap openldap-clients openldap-servers pcre-devel libmcrypt-devel readline-devellibcap-devel ntpdate vim tree wget > /dev/null 2>&1 if [ $? -eq 0 ] ; then echo "gcc-c++,gcc,make等工具安裝完成!" fi #系統基本設置，包括時間同步設置，firewalld，root禁止登陸等 #系統時間及時區設置 /usr/bin/timedatectl set-timezone Asia/Shanghai echo "正在同步網絡時間......" /usr/sbin/ntpdate cn.pool.ntp.org > /dev/null 2>&1 && echo "網絡時間同步完成！" || echo "網絡時間同步失敗" /sbin/hwclock --systohc #設置為每天同步網絡時間 if [ ! -f /var/spool/cron/root ] then touch /var/spool/cron/root fi is_ntpdate=$(grep "ntpdate" /var/spool/cron/root |wc -l) if [ $is_ntpdate -eq 0 ] ; then cat >> /var/spool/cron/root <<EOF 59 23 * * * /usr/sbin/ntpdate cn.pool.ntp.org > /dev/null EOF fi #禁用selinux和firewalld /usr/bin/sed -i 's/^SELINUX=.*$/SELINUX=disabled/' /etc/selinux/config > /dev/null 2>&1 && echo "已禁用系統selinux" /usr/bin/systemctl stop firewalld > /dev/null 2>&1 /usr/bin/systemctl disable firewalld > /dev/null 2>&1 setenforce 0 #系統升級 echo "系統正在升級中......該過程可能需要十幾分鍾或更久，請稍等！" yum update -y > /dev/null 2>&1 if [ $? -eq 0 ] ; then echo "系統升級成功" fi #系統參數優化 echo "正在優化系統參數......" sed -i '5,$d' /etc/security/limits.d/20-nproc.conf cat >> /etc/security/limits.d/20-nproc.conf <<EOF * soft nproc 655350 * soft nofile 655350 * hard nofile 655350 * hard nproc 655350 root soft nproc unlimited EOF echo 10240 > /proc/sys/net/core/somaxconn echo never > /sys/kernel/mm/transparent_hugepage/enabled && echo never > /sys/kernel/mm/transparent_hugepage/defrag sysctl vm.overcommit_memory=1 > /dev/null 2>&1 sed -i '10,$d' /etc/sysctl.conf cat >> /etc/sysctl.conf <<EOF vm.overcommit_memory = 1 net.ipv4.tcp_syncookies = 0 net.ipv4.ip_local_port_range = 1024 65535 net.core.rmem_max=16777216 net.core.wmem_max=16777216 net.ipv4.tcp_rmem=4096 87380 16777216 net.ipv4.tcp_wmem=4096 65536 16777216 net.ipv4.tcp_fin_timeout = 10 net.ipv4.tcp_tw_recycle = 1 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_timestamps = 0 net.ipv4.tcp_window_scaling = 0 net.ipv4.tcp_sack = 0 net.core.netdev_max_backlog = 30000 net.ipv4.tcp_no_metrics_save=1 net.core.somaxconn = 65535 net.ipv4.tcp_max_orphans = 262144 net.ipv4.tcp_max_syn_backlog = 262144 net.ipv4.tcp_synack_retries = 2 net.ipv4.tcp_syn_retries = 2 net.ipv4.tcp_retries2 = 5 net.ipv4.tcp_keepalive_time = 40 net.ipv4.tcp_keepalive_probes = 3 net.ipv4.tcp_keepalive_intvl = 10 EOF echo "系統參數已經優化!" #配置開機啟動項 echo '' > /etc/init.d/optimizing cat >> /etc/init.d/optimizing <<EOF #!/bin/bash ### BEGIN INIT INFO # Provides: optimizing # Required-Start: \$local_fs # Required-Stop: # X-Start-Before: redis mongod mongodb-mms-automation-agent # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: Optimizing script # Description: Optimizing script. ### END INIT INFO case \$1 in start) # transparent hugepage thp_path=/sys/kernel/mm/transparent_hugepage echo 'never' > \${thp_path}/enabled echo 'never' > \${thp_path}/defrag # somaxconn echo '10240' > /proc/sys/net/core/somaxconn ulimit -f unlimited ulimit -t unlimited ulimit -v unlimited ulimit -n 655350 ulimit -m unlimited ulimit -c unlimited ulimit -u 655350 unset thp_path ;; esac EOF if [ $? -eq 0 ] ;then chmod 755 /etc/init.d/optimizing chkconfig optimizing on fi if [ ! -d /app ] then mkdir -p /app mkdir -p /app/backup mkdir -p /app/data mkdir -p /app/logs mkdir -p /app/opt mkdir -p /app/scripts mkdir -p /app/tools mkdir -p /app/www else mkdir -p /app/backup mkdir -p /app/data mkdir -p /app/logs mkdir -p /app/opt mkdir -p /app/scripts mkdir -p /app/tools mkdir -p /app/www fi } while : do cat <<EOF +---------------------------------------------------------------+ | | | This is a LNMP | | | | 1.必須先執行 '1' 安裝linux環境基礎 | | 2.退出安裝程序 | +---------------------------------------------------------------+ EOF read -p "請你輸入一個數字:" num case "$num" in 1) Basics ;; 2) exit ;; *) echo '輸入錯誤，已重新加載....' ;; esac done -
執行系統初始化腳本
[root@master ~]# sh system_Initialize.sh +---------------------------------------------------------------+ | | | This is a LNMP | | | | 1.必須先執行 '1' 安裝linux環境基礎 | | 2.退出安裝程序 | +---------------------------------------------------------------+ 請你輸入一個數字:1 epel源安裝中，請稍等...... epel源安裝完成! gcc-c++,gcc,make等工具安裝中，請稍等...... gcc-c++,gcc,make等工具安裝完成! 正在同步網絡時間...... 網絡時間同步失敗 已禁用系統selinux 系統正在升級中......該過程可能需要十幾分鍾或更久，請稍等！ 系統升級成功 正在優化系統參數...... 系統參數已經優化! +---------------------------------------------------------------+ | | | This is a LNMP | | | | 1.必須先執行 '1' 安裝linux環境基礎 | | 2.退出安裝程序 | +---------------------------------------------------------------+ 請你輸入一個數字:2