用python监控Linux，CPU,内存，硬盘

#!/usr/local/bin/python3.5
#coding:utf-8
import mailll, linecache, re, socket, os, time

hostname = socket.gethostname()
ip = socket.gethostbyname(hostname)

def cpu_status():
    with open("/proc/loadavg", 'rt') as f:
        data = f.read().split()
    if float(data[2]) > 0.7:
        with open("/home/cpustatus.txt", 'wt') as f:
            print("notice : 
        Hostname : %s
        IP : %s

        The CPU loadavg will overload : %s" % (hostname, ip, data[2]), file = f) 
        mailll.send_mail("/home/cpustatus.txt")    

def memory_status():
    theline = linecache.getline(r'/proc/meminfo', 2)
    mem_free_num = "".join(re.findall(r"[0-9]", theline))
 
    if (int(mem_free_num) / 1000) < 100:
        with open("/home/memory.txt", 'wt') as f:
            print("notice : 
        Hostname : %s
        IP : %s

        Insufficient free memory : %s" % (hostname, ip, str(int(mem_free_num) / 1000) + "M"), file = f)
        mailll.send_mail("/home/memory.txt") 

def disk_status():
    os.system("df -hT |grep ext4 |awk -F '[ %]+' ' {if($6 >= 70) print $6}' |wc -l > /home/diskstatus.txt")
    diskcount = int(linecache.getline(r'/home/diskstatus.txt', 1))
    if diskcount >= 1 :
        
        with open("/home/diskstatus.txt", 'wt') as f:
            print("notice : 
        Hostname : %s
        IP : %s
" % (hostname, ip), file = f)            
        os.system("echo 'Hard disk capacity is insufficient :' >> /home/diskstatus.txt")
        os.system("df -hT |grep 'ext4|Filesystem' >> /home/diskstatus.txt")
        mailll.send_mail('/home/diskstatus.txt')


try:
    cpu_status()
    time.sleep(2)
    memory_status()
    time.sleep(2)
    disk_status()
except Exception as e:
    print("program is error!!!")

新手，自我感觉就是功能实现了，代码实在不怎么样，但是还是记录下来，希望大家多多指出不足，以后随着学习的深入，希望能做的更好！

END！！！