centos默认终端bash美化、颜色设置

sudo vim ~/.bashrc
# 在最后追加：

IP=$(ip addr show enp3s0 | grep -w "inet" | awk '{ print $2; }' | sed 's/\/.*$//')
export PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\u\[\033[00m\]@\h(\[\e[32m\]$IP\[\e[m\]): \[\033[01;36m\]\w\[\033[00m\] \[\t\]\n\$ '

export LS_COLORS=$LS_COLORS"*.py=00;35:*.pl=00;32:*.sh=01;32:*.xls=04;36:*.png=04;35;43:*.fa=04;33:*.R=00;32:*.r=00;32:*.vcf=04;35:"

export HISTTIMEFORMAT="%Y-%M-%D %H:%M:%S"
export HISTSIZE=100000
export HISTFILESIZE=1000000
export HISTFILE=/~/.commandline_warrior
shopt -s histappend
PROMPT_COMMAND='history -a'

# 保存退出然后使之生效：

source ~/.bashrc

配置 centos 7源

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

yum clean all
yum makecache
yum update

关闭服务

#显示为 SELINUX=disabled 则正确
sudo grep SELINUX=disabled /etc/selinux/config 

#若显示不为disabled，执行以下命令 
sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config

systemctl status firewalld.service
#关闭运行的防火墙
systemctl stop firewalld.service

#禁止防火墙服务器
systemctl disable firewalld.service 

配置集群免密

# 设置服务器名称
hostnamectl set-hostname node1
#创建用户需使用 root 登录
useradd user1

# 添加密码
echo "user1" | passwd --stdin user1

# 配置 sudo 免密
sed -i '$user1   ALL=(ALL)  NOPASSWD: NOPASSWD: ALL' /etc/sudoers
sed -i 's/Defaults    requirett/#Defaults    requirett/g' /etc/sudoers

# 修改目录权限
chown -R user1:user1 /home/user1/data

#生成秘钥
su user1
ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa

cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys

#复制私钥到其他服务器
ssh-copy-id -i ~/.ssh/id_rsa_for252.pub root@10.199.160.252
ssh-copy-id  slave1
ssh-copy-id  slave2

复制文件

1. 远程 复制到本地

scp root@emr-header-1:/opt/commons-lang-2.6.jar /opt

1. 复制本地 到远程

scp test.txt file2.txt root@emr-header-1:/opt

端口占用

lsof -i tcp:80

ss -nltp | awk '{print $0}'

分析网络

ss -na | awk '/^tcp/ {++S[$2]} END {for(a in S) print a, S[a]}'