通过Bash获取系统操作信息

功能一、提取操作系统信息（内核、系统版本、网络地址）

功能二、分析系统的运行状态（CPU负载、内存及磁盘使用率等）

#! /bin/bash

clear

if [[ $# -eq 0 ]]

then

reset_terminal=$(tput sgr0)

#Check OS Type

os=$(uname -o)

echo -e '\E[32m' "Operating System Type:" $reset_terminal $os

#Check OS Release Version and Name

os_name=$(cat /etc/centos-release)

echo -e '\E[32m' "Check OS Release Version and Name:" $reset_terminal $os_name

#Check Architecture

architeture=$(uname -m)

echo -e '\E[32m' "Check Architecture:" $reset_terminal $architeture

#Check Kernel Release

kernerrelease=$(uname -r)

echo -e '\E[32m' "Check Kernel Release" $reset_terminal $kernerrelease

#Check hostname

hostname=$(hostname)

echo -e '\E[32m' "Check hostname:" $reset_terminal $hostname

#check Internal IP

Internet=$(hostname -I)

echo -e '\E[32m' "check Internal IP:" $reset_terminal $Internet

#Check External IP

External=$(curl -s http://ipecho.net/plain)

#Check DNS

nameserver=$(cat /etc/resolv.conf | grep -E "\

echo -e '\E[32m' "Check DNS:" $reset_terminal $nameserver

#Check if connected to Internet or not

ping -c 2 www.baidu.com &>/dev/null && echo "Internet:Connected"|| echo "Internet:Disconnected"

#Check Logged In Users

who>/tmp/who

echo -e '\E[32m' "Logged In Users:" $reset_terminal && cat /tmp/who

rm -rf /tmp/who

###########################################################

system_mem_usages=$( awk '/MemTotal/{total=$2}/MemFree/{free=$2}END{print (total-free)/1024}' /proc/meminfo )

apps_mem_usages=$( awk '/MemTotal/{total=$2}/MemFree/{free=$2}/^Cached/{cached=$2}/Buffers/{buffers = $2}END{print (total-free-cached-buffers)/1024}' /proc/meminfo )

echo -e '\E[32m' "Check system memuserages:" $reset_terminal $system_mem_usages

echo -e '\E[32m' "Check apps memuserages:" $reset_terminal $apps_mem_usages

loadaverge=$( top -n 1 -b | grep "load average:" | awk '{print $10,$11,$12}')

echo -e '\E[32m'"Load averges" $reset_terminal $loadaverge

fi