在Linux中如何查看服务器整体情况

#!/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