centos常用配置

vim /etc/sysconfig/network-scripts/ifcfg-ens**

ifconfig eth0 192.168.120.56
ifconfig eth0 192.168.120.56 netmask 255.255.255.0
ifconfig eth0 192.168.120.56 netmask 255.255.255.0 broadcast 192.168.120.255

sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/sysconfig/selinux && setenforce 0

timedatectl list-timezones                    # 列出所有时区
timedatectl set-local-rtc 1                   # 将硬件时钟调整为与本地时钟一致, 0 为设置为 UTC 时间
timedatectl set-timezone Asia/Shanghai        # 设置系统时区为上海


timedatectl status                            # 查看状态

timedatectl set-ntp 0                         # 禁用ntp

# 只设置时间的话可以使用set-time开关以及HH：MM：SS（小时，分，秒）的时间格式。
timedatectl set-time 15:58:30

# 只设置日期的话可以使用set-time开关以及YY：MM：DD（年，月，日）的日期格式。
timedatectl set-time 20151120

# 设置日期和时间：
timedatectl set-time '16:10:40 2015-11-20'

yum install ntp ntpdate -y 

systemctl start ntpdate

ntpdate time.windows.com

sysctl -w net.ipv4.ip_forward=1

重启,在grub2界面 先按↑停在这个界面,然后按e进入编辑模式
找到linux16 那一行, 在后面添加 init=/bin/sh
按ctrl + x 重启系统

mount -o remount,rw /
passwd root

运行命令“touch /.autorelabel”使selinux生效，否则可能无法正常启动，然后运行“exec /sbin/init”重启系统即可
touch /.autorelabel
exec /sbin/init

# 修改默认语言
sed -i 's@LANG=.*$@LANG="en_US.UTF-8"@g' /etc/locale.conf

# 通过环境变量设置时区
export TZ='Asia/Shanghai'

# 修改时区(修改环境变量后就没必要这样修改了)
rm -rf /etc/localtime
ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

yum install dejavu-lgc-sans-fonts

vim /etc/profile

export http_proxy="http://10.0.0.1:21882"
source /etc/profile

systemctl list-units                    ##列出当前系统服务的状态
systemctl list-unit-files               ##列出服务的开机状态
systemctl status sshd                   ##查看指定服务的状态
systemctl stop sshd                     ##关闭指定服务
systemctl start sshd                    ##开启指定服务
systemctl restart sshd                  ##从新启动服务
systemctl enable sshd                   ##设定指定服务开机开启
systemctl disable sshd                  ##设定指定服务开机关闭
systemctl reload sshd                   ##使指定服务从新加载配置
systemctl list-dependencies sshd        ##查看指定服务的倚赖关系
systemctl mask  sshd                    ##冻结指定服务
systemctl unmask sshd                   ##启用服务
systemctl set-default multi-user.target ##开机不开启图形
systemctl set-default graphical.target  ##开机启动图形
setterm                                 ##文本界面设定color

ll /usr/lib/systemd/system/

systemctl list-unit-files | grep enabled
ll /etc/systemd/system/multi-user.target.wants/

hostnamectl set-hostname centos1

systemctl start firewalld.service
systemctl stop firewalld.service
systemctl disable firewalld.service

yum groupinstall "Development Tools"

wget https://code.aliyun.com/iuxt/src/raw/master/centos7-rpm/git-2.22/git-2.22.0-1.WANdisco.437.x86_64.rpm https://code.aliyun.com/iuxt/src/raw/master/centos7-rpm/git-2.22/perl-Git-2.22.0-1.WANdisco.437.noarch.rpm

yum localinstall -y *.rpm

rm -f perl-Git-2.22.0-1.WANdisco.437.noarch.rpm git-2.22.0-1.WANdisco.437.x86_64.rpm

rpm -ql yum

rpm -qa

yum localinstall ./xxx.rpm

rpm -ivh ./xxx.rpm

mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backup

# CentOS 7
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
# 非阿里云ECS用户
sed -i -e '/mirrors.cloud.aliyuncs.com/d' -e '/mirrors.aliyuncs.com/d' /etc/yum.repos.d/CentOS-Base.repo

# epel(RHEL 7)
curl -o /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo

yum install https://mirrors.aliyun.com/remi/enterprise/remi-release-7.rpm

yum install php74-php-fpm

rpm -qf  /file/path

yum provides libm.so.6

yum install --downloadonly --downloaddir=/tmp/ vsftpd

yum list kubelet kubeadm kubectl  --showduplicates | sort -r

yum install kubelet-1.16.9-0 kubeadm-1.16.9-0 kubectl-1.16.9-0