一键查看服务器的利用率

 1. CPU 60%2. 内存 利用率3. 硬盘 利用率4. TCP连接状态

#!/bin/bash
function cpu() {NUM=1while [ $NUM -le 3 ]; doutil=`vmstat |awk '{if(NR==3)print 100-$15"%"}'`user=`vmstat |awk '{if(NR==3)print $13"%"}'`sys=`vmstat |awk '{if(NR==3)print $14"%"}'`iowait=`vmstat |awk '{if(NR==3)print $16"%"}'`echo "CPU - 使用率: $util , 等待磁盘IO响应使用率: $iowait"let NUM++sleep 1done
}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: ${available}G"
}function disk() {fs=$(df -h |awk '/^\/dev/{print $1}')for p in $fs; domounted=$(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