第二篇：linux系统优化及克隆

ip a 查看网卡运行状态​如果网卡处于done或者网卡无显示信息，systemctl restart network重启网卡、停止NetworkManager​查看网卡配置文件具体信息

虚拟网络编辑器 ---> vmnet8 网卡设置 查看子网、掩码、网关等设置

本地网卡检查 ---> 控制面板\网络和 Internet\网络连接本地服务检查 ---> 任务管理器 服务 vmware相关服务重启

rm -f /etc/yum.repos.d/*​curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo​curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo​#或​curl -o /etc/yum.repos.d/CentOS-Base.repo https://repo.huaweicloud.com/repository/conf/CentOS-7-reg.repoyum install -y https://repo.huaweicloud.com/epel/epel-release-latest-7.noarch.rpm​sed -i "s/#baseurl/baseurl/g" /etc/yum.repos.d/epel.reposed -i "s/metalink/#metalink/g" /etc/yum.repos.d/epel.reposed -i "s@https\?://download.fedoraproject.org/pub@https://repo.huaweicloud.com@g" /etc/yum.repos.d/epel.repo​yum clean allyum makecache

yum -y upgrade #只升级系统包，不升级软件和系统内核yum -y update #升级系统包、软件、内核。刚做完系统执行一次，以后不要执行，避免长时间未更新，出现兼容问题。

yum install net-tools vim tree htop iftop iotop bash-completion bash-completion-extras lrzsz sysstat sl lsof unzip telnet nmap nc psmisc dos2unix bash-completion wget nethogs ntpdate nfsutils rsync glances gcc gcc-c++ glibc yum-utils httpd-tools -y

systemctl stop firewalld ----->临时关闭systemctl status firewalld ----->查看状态systemctl disable firewalld ----->永久关闭

setenforce 0 ----->临时关闭sed -i /^SELINUX=/c SELINUX=disabled /etc/selinux/config --->永久关闭[root@oldboy ~]# getenforce ----->检查状态Permissive

systemctl stop NetworkManager ----->临时关闭systemctl status NetworkManager ----->查看状态systemctl disable NetworkManager ----->永久关闭

echo #Timing synchronization time >>/var/spool/cron/root #给定时任务加上注释echo 0 */1 * * * /usr/sbin/ntpdate ntp1.aliyun.com &>/dev/null >>/var/spool/cron/root #设置定时任务crontab -l #检查结果

[ "$PS1" = "\\s-\\v\\\$ " ] && PS1="[\[\e[34;1m\]\u@\[\e[0m\]\[\e[32;1m\]\H\[\e[0m\] \[\e[31;1m\]\w\[\e[0m\]]\\$ "

sed -i s@#UseDNS yes@UseDNS no@g /etc/ssh/sshd_configsed -i s@^GSSAPIAuthentication yes@GSSAPIAuthentication no@g /etc/ssh/sshd_configsystemctl restart sshd

10.0.0.3 VIP172.16.1.4 lb4172.16.1.5 lb01172.16.1.6 lb02172.16.1.7 web01172.16.1.8 web02172.16.1.9 web03172.16.1.31 nfs172.16.1.41 backup172.16.1.42 backup02172.16.1.51 db01172.16.1.52 db02172.16.1.53 db03172.16.1.61 m01172.16.1.71 zabbix172.16.1.81 redis01172.16.1.82 redis02172.16.1.91 es01172.16.1.92 es02

echo * - nofile 65535 >> /etc/security/limits.conf

hostnamectl set-hostname web01 #注意看要换的名字​sed -i s#200#41#g /etc/sysconfig/network-scripts/ifcfg-eth[01] #注意自己要换的ip和原ip是什么​systemctl restart network