Linux Shell脚本：shell中的运算

整数运算 

 小数运算

服务器信息脚本练习 

#! /bin/bash

echo -e "33[34m------SERVER Information------33[0m"
echo -e "33[32mNet Info:33[0m"
ifconfig ens33 |grep "inet "

echo -e "33[32mMem Info:33[0m"
grep MemAvailable /proc/meminfo

echo -e "33[32mroot file sys:33[0m"
df -h /

echo -e "33[32mCPU Info:33[0m"
grep "model name" /proc/cpuinfo