一键查看服务器资源利用率

#/bin/bash
# ------------------------------------------
# Filename:         服务器系统配置初始化脚本.sh
# Version:          1.1
# Date:             2023/10/24
# Author:           tanghao
# Email:            2826588067@qq.com
# Description:      This is the script
# Copyright:        2023 tanghao
# License:          GPL
# ------------------------------------------
#!/bin/bash
function cpu() {
    NUM=1
    while [ $NUM -le 3 ]; do
        util=`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 -e "\033[31m; CPU - 使用率: $util , 等待磁盘IO响应使用率: $iowait \033[0m"
        let NUM++
        sleep 1
    done
}
​
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 -e "\033[31m; 内存 - 总大小: ${total}G , 使用: ${used}G , 剩余: ${available}G \033[0m"
}
​
function disk() {
    fs=$(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 -e "\033[31m; 硬盘 - 挂载点: $mounted , 总大小: $size , 使用: $used , 使用率: $used_percent \033[0m"
    done
}
​
function tcp_status() {
    summary=$(ss -antp |awk 'NR!=1{print $1}'| awk '{++S[$NF]}END{for( i in S) printf i":"S[i] " " }')
    echo -e "\033[31m;1 TCP连接状态 - $summary \033[0m"
}
option="
查看cpu
查看memory
查看disk
查看tcp连接
查看以上所有
退出
"
​
PS3="Please select the option you want to optimize 1-6 :"
select menu in $option ;do
    case $REPLY in
      1)
      cpu
      ;;
      2)
      memory
      ;;
      3)
      disk
      ;;
      4)
      tcp_status
      ;;
      5)
      cpu
      memory
      disk
      tcp_status 
      ;;
      6)
      exit
      ;;
      *)
    echo -e "\033[31m;1 你输入数字有误,请重新输入 \033[0m"
      ;;
     esac
done  
​