安装centos 7.9 系统
安装centos系统
1. 安装centos系统
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我们开始安装centos7系统
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第一步，配置centos7，选择安装
使用上下键选择了，install Centos7后按tab键输入，net.ifnames=0 biosdevname=0
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选择语言和键盘格式
选择默认就行
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手动配置一下磁盘
选择 I will configure partitioning进行配置
点击 click here to create them automatically进行配置
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配置磁盘
这里根据情况配置，swap根据一般为内存的2倍，/boot一般默认1024mib就行，剩下的都给根级目录 "/"
点击 Begin installation进行安装
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设置root密码
由于这里演示怎么安装，这里密码设置为123456，可以根据自己情况进行安装，确认密码后返回安装界面
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安装界面
点击重启，就到此安装完成
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创建系统初始化test.sh脚本
[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(){ #安装epel，源 echo "epel源安装中，请稍等......" yum install epel-release -y > /dev/null 2>&1 echo "epel源安装完成!" echo "gcc-c++,gcc,make等工具安装中，请稍等......" 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 [ $? -eq 0 ] ; then echo "gcc-c++,gcc,make等工具安装完成!" fi #系统基本设置，包括时间同步设置，firewalld，root禁止登陆等 #系统时间及时区设置 /usr/bin/timedatectl set-timezone Asia/Shanghai echo "正在同步网络时间......" /usr/sbin/ntpdate cn.pool.ntp.org > /dev/null 2>&1 && echo "网络时间同步完成！" || echo "网络时间同步失败" /sbin/hwclock --systohc #设置为每天同步网络时间 if [ ! -f /var/spool/cron/root ] then touch /var/spool/cron/root fi is_ntpdate=$(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 "已禁用系统selinux" /usr/bin/systemctl stop firewalld > /dev/null 2>&1 /usr/bin/systemctl disable firewalld > /dev/null 2>&1 setenforce 0 #系统升级 echo "系统正在升级中......该过程可能需要十几分钟或更久，请稍等！" yum update -y > /dev/null 2>&1 if [ $? -eq 0 ] ; then echo "系统升级成功" fi #系统参数优化 echo "正在优化系统参数......" sed -i '5,$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 "系统参数已经优化!" #配置开机启动项 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 [ $? -eq 0 ] ;then chmod 755 /etc/init.d/optimizing chkconfig optimizing on fi if [ ! -d /app ] then mkdir -p /app mkdir -p /app/backup mkdir -p /app/data mkdir -p /app/logs mkdir -p /app/opt mkdir -p /app/scripts mkdir -p /app/tools mkdir -p /app/www else mkdir -p /app/backup mkdir -p /app/data mkdir -p /app/logs mkdir -p /app/opt mkdir -p /app/scripts mkdir -p /app/tools mkdir -p /app/www fi } while : do cat <<EOF +---------------------------------------------------------------+ | | | This is a LNMP | | | | 1.必须先执行 '1' 安装linux环境基础 | | 2.退出安装程序 | +---------------------------------------------------------------+ EOF read -p "请你输入一个数字:" num case "$num" in 1) Basics ;; 2) exit ;; *) echo '输入错误，已重新加载....' ;; esac done -
执行系统初始化脚本
[root@master ~]# sh system_Initialize.sh +---------------------------------------------------------------+ | | | This is a LNMP | | | | 1.必须先执行 '1' 安装linux环境基础 | | 2.退出安装程序 | +---------------------------------------------------------------+ 请你输入一个数字:1 epel源安装中，请稍等...... epel源安装完成! gcc-c++,gcc,make等工具安装中，请稍等...... gcc-c++,gcc,make等工具安装完成! 正在同步网络时间...... 网络时间同步失败 已禁用系统selinux 系统正在升级中......该过程可能需要十几分钟或更久，请稍等！ 系统升级成功 正在优化系统参数...... 系统参数已经优化! +---------------------------------------------------------------+ | | | This is a LNMP | | | | 1.必须先执行 '1' 安装linux环境基础 | | 2.退出安装程序 | +---------------------------------------------------------------+ 请你输入一个数字:2
