Centos7-基本设置

设置hostname

hostnamectl set-hostname ABC

查看网络连接

netstat/ss -lntcp

查找软件

rpm -ql python
find /tmp/ -name

安装vim

yum install vim

关闭selinux

vim /etc/sysconfig/selinux 状态改为disabled

配置chrony（兼容NTP，可作为NTP服务器）

vim /etc/chrony.conf
server端：
server ntp1.aliyun.com iburst
server ntp2.aliyun.com iburst
allow *
chronyc tracking
client端：
server server-ip iburst
ntpdate -u IP #-u参数可以越过防火墙与主机同步）
检查chrony情况：chronyc -- sources sourcestas client

YUM相关

cd /etc/yum.repo
yum search / list / update / remove / makecache /repolist

关闭网卡

ifup eth0 / ifdown eth0

配置阿里云镜像

yum install wget
cp /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.bak
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
cp /etc/yum.repos.d/epel.repo /etc/yum.repos.d/epel.repo.bak
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum makecache

配置DNS

vim /etc/resolv.conf nameserver ip

关闭ipv6

vim /etc/sysctl.conf
net.ipv6.conf.all.disable_ipv6 =1
net.ipv6.conf.default.disable_ipv6 =1
sysctl -p
若系统正在运行
echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
echo 1 > /proc/sys/net/ipv6/conf/default/disable_ipv6
或者
sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1
重启生效
reboot
netstat -lnpt

提示netstat command can not fing

yum install net-tools

新添加硬盘手动扫描

cd /sys/class/scsi_host
echo "---" > /sys/class/scsi_host/host0/scan

查看各文件大小

du -smh *

centos7-vmtool

yum install -y open-vm-tools
systemctl enable vmtoolsd
systemctl start vmtoolsd