配置网卡
BOOTPROTO=none
ONBOOT=yes
IPADDR=xxx.xxx.x.xx
PREFIX=24
GATEWAY=xxx.xxx.x.x
DNS1=xxx.xxx.x.x
注:删掉网卡内的UUID ,通用唯一识别码和HWADDR MAC地址 这两行。 所有网卡都需要删除
安装wget:yum -y install wget;
修改为阿里的yum源
1、cd /etc/yum.repos.d
2、备份
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup
或
mv /etc/yum/repos.d/CentOS-Base.repo{,.date -I}
3、下载版本
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
4、添加epel
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
5、生成缓存
yum clean all
yum makecache
下载常用工具
yum -y install wget net-tools screen lsof tcpdump nc mtr openssl-devel vim bash-completion lrzsz nmap telnet tree ntpdate bash-completion chrony vsftpd
提升效率:
yum -y install ncdu glances mosh rsync
关闭selinux
sed -i.bak 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config
关闭防火墙
systemctl stop firewalld
systemctl disable firewalld
修改主机名
hostnamectl set-hostname 7mini
修改字符集
localectl status #查看当前字符集
LANG=zh_CN.UTF-8
修改文件数限制
ulimit -n #默认大小
1024
echo "* soft nofile 65536" >> /etc/security/limits.conf #xi修改最大限制为65535
echo "* hard nofile 65536" >> /etc/security/limits.conf
reboot #重启后生效
时间同步
ntpdate ntp1.aliyun.com
cp /etc/chrony.conf{,.bak}
vim /etc/chrony.conf
server ntp6.aliyun.com iburst
systemctl start chronyd
systemctl enable chronyd #开机启动
systemctl restart chronyd
chronyc sources #查看同步源
[root@7mini-node2 ~]# chronyc sources
210 Number of sources = 1
^* 203.107.6.88 2 6 17 31 +653us[+1965us] +/- 32ms
2)或者通过计划任务进行同步
[root@linux-node1 ~]# crontab -e
no crontab for root - using an empty one
crontab: installing new crontab
[root@linux-node1 ~]# crontab -l
*/5 * * * * /usr/sbin/ntpdate time1.aliyun.com > /dev/null
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