CentOS Tips

yum list installed | grep gcc
yum list installed | grep lrzsz

lrzsz

  • lrzsz官网

  • yum -y install lrzsz

  • sz /home/shelldir/*.sh：下载目录

离线安装

lrzsz-0.12.20.tar.gz

mkdir -p ~/tool/lrzsz/
mv lrzsz-0.12.20.tar.gz ~/tool/lrzsz/
cd ~/tool/lrzsz/
tar -zxvf lrzsz-0.12.20.tar.gz
cd lrzsz-0.12.20
./configure --prefix=~/tool/lrzsz/
make && make install

cd ~/tool/lrzsz/bin
ln -s lsz sz
ln -s lrz rz
#修改环境变量，在~/.bashrc文件末尾加入export PATH="~/tool/lrzsz/bin:$PATH"
vi ~/.bashrc
source ~/.bashrc

iptables

  • 暂时关闭/打开

    • service iptables stop

    • service iptables start

  • 永久打开/关闭

    • chkconfig iptables on

    • chkconfig iptables off

  • 验证

    • chkconfig --list | grep iptables

network

  • service network restart

ntpdate

  • yum -y install ntp ntpdate

  • vim /etc/rc.d/rc.local

    • /usr/sbin/ntpdate cn.pool.ntp.org

telnet

  • yum install telnet

zip

  • yum -y install zip

Commands

bc

  • scale=2

sar

  • yum install sysstat

mail

  • yum -y install mailx

  • yum install sendmail

vim

  • yum -y install vim*

sudo

sudo visudo
sysadmin ALL=(ALL) NOPASSWD:ALL

git

sudo yum -y install git
git --version
git config --global user.name "T5750"
git config --global user.email "you@example.com"
git config --list

AppStream

cd /etc/yum.repos.d
sudo mkdir backup
sudo mv *.repo backup/
sudo curl -o /etc/yum.repos.d/Centos-vault-8.5.2111.repo https://mirrors.aliyun.com/repo/Centos-vault-8.5.2111.repo
yum clean all && yum makecache

References