一键查看服务器利用率

背景：web访问过慢，服务器内存搞

cpu 60%
内存利用率
硬盘利用率
TCP连接状态

脚本编写

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#!/bin/bash
function cpu(){
	
	util=$(vmstat | awk '{if(NR==3)print $13+$14}')
	iowait=$(vmstat | awk '{if(NR==3)print $16}')
	echo "CPU -使用率：${util}% ,等待磁盘IO相应使用率：${iowait}:${iowait}%"

}
function memory (){

	total=`free -m |awk '{if(NR==2)printf "%.1f",$2/1024}'`
    used=`free -m |awk '{if(NR==2) printf "%.1f",($2-$NF)/1024}'`
    available=`free -m |awk '{if(NR==2) printf "%.1f",$NF/1024}'`
    echo "内存 - 总大小: ${total}G , 使用: ${used}G , 剩余: ${available}G"
}
disk(){
	
	fs=$(df -h |awk '/^\/dev/{print $1}')
    for p in $fs; do
        mounted=$(df -h |awk '$1=="'$p'"{print $NF}')
        size=$(df -h |awk '$1=="'$p'"{print $2}')
        used=$(df -h |awk '$1=="'$p'"{print $3}')
        used_percent=$(df -h |awk '$1=="'$p'"{print $5}')
        echo "硬盘 - 挂载点: $mounted , 总大小: $size , 使用: $used , 使用率: $used_percent"
    done

}
function tcp_status() {
    summary=$(ss -antp |awk '{status[$1]++}END{for(i in status) printf i":"status[i]" "}')
    echo "TCP连接状态 - $summary"
}
cpu
memory
disk
tcp_status