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  • centos 7 服务初始化

    更新yum源及必要软件安装

    yum groupinstall "Development tools" "Compatibility libraries" 
    yum install -y ntpdate vim mlocate lsof wget lrzsz telnet traceroute tree rsync cmake autoconf automake pcre pcre-devel zlib zlib-devel epel-release

    yum重新建立缓存

    yum clean all
    yum makecache

    关闭防火墙、selinux
    systemctl stop firewalld #临时关闭防火墙
    systemctl disable firewalld #防火墙开机关闭

    setenforce 0 #临时关闭SELinux
    sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config #开机关闭SELinux

    设置最大打开文件描述符数

    echo "ulimit -SHn 102400" >> /etc/rc.local

    cat >> /etc/security/limits.conf << EOF
    * soft nofile 655350
    * hard nofile 655350
    EOF

    内核参数优化

    #cat >> /etc/sysctl.conf << EOF
    vm.overcommit_memory = 1
    net.ipv4.ip_local_port_range = 1024 65536
    net.ipv4.tcp_fin_timeout = 1
    net.ipv4.tcp_keepalive_time = 1200
    net.ipv4.tcp_mem = 94500000 915000000 927000000
    net.ipv4.tcp_tw_reuse = 1
    net.ipv4.tcp_tw_recycle = 1
    net.ipv4.tcp_timestamps = 0
    net.ipv4.tcp_synack_retries = 1
    net.ipv4.tcp_syn_retries = 1
    net.ipv4.tcp_abort_on_overflow = 0
    net.core.rmem_max = 16777216
    net.core.wmem_max = 16777216
    net.core.netdev_max_backlog = 262144
    net.core.somaxconn = 262144
    net.ipv4.tcp_max_orphans = 3276800
    net.ipv4.tcp_max_syn_backlog = 262144
    net.core.wmem_default = 8388608
    net.core.rmem_default = 8388608
    net.ipv4.netfilter.ip_conntrack_max = 2097152
    net.nf_conntrack_max = 655360
    net.netfilter.nf_conntrack_tcp_timeout_established = 1200
    EOF

    #/sbin/sysctl -p

    主机名修改

    hostname 主机名 #先修改临时名,重启后会失效
    hostnamectl set-hostname 主机名 #永久修改主机名,需要重启

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  • 原文地址:https://www.cnblogs.com/liujunjun/p/11849853.html
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