linux获取内存、cpu、负载、网口流量、磁盘信息

内存信息 / meminfo

 返回dict

1.   #!/usr/bin/env python
2.   def memory_stat():
3.   mem = {}
4.   f = open("/proc/meminfo")
5.   lines = f.readlines()
6.   f.close()
7.   for line in lines:
8.   if len(line) < 2: continue
9.   name = line.split(':')[0]
10.   var = line.split(':')[1].split()[0]
11.   mem[name] = long(var) * 1024.0
12.   mem['MemUsed'] = mem['MemTotal'] - mem['MemFree'] - mem['Buffers'] - mem['Cached']
13.   return mem

CPU信息 / cpuinfo
返回list，每核心一dict

1.   #!/usr/bin/env python
2.   def cpu_stat():
3.   cpu = []
4.   cpuinfo = {}
5.   f = open("/proc/cpuinfo")
6.   lines = f.readlines()
7.   f.close()
8.   for line in lines:
9.   if line == '\n':
10.   cpu.append(cpuinfo)
11.   cpuinfo = {}
12.   if len(line) < 2: continue
13.   name = line.split(':')[0].rstrip()
14.   var = line.split(':')[1]
15.   cpuinfo[name] = var
16.   return cpu

负载信息 / loadavg
返回dict

1.   #!/usr/bin/env python
2.   def load_stat():
3.   loadavg = {}
4.   f = open("/proc/loadavg")
5.   con = f.read().split()
6.   f.close()
7.   loadavg['lavg_1']=con[0]
8.   loadavg['lavg_5']=con[1]
9.   loadavg['lavg_15']=con[2]
10.   loadavg['nr']=con[3]
11.   loadavg['last_pid']=con[4]
12.   return loadavg

运转时间 / Uptime
返回dict

1.   #!/usr/bin/env python
2.   def uptime_stat():
3.   uptime = {}
4.   f = open("/proc/uptime")
5.   con = f.read().split()
6.   f.close()
7.   all_sec = float(con[0])
8.   MINUTE,HOUR,DAY = 60,3600,86400
9.   uptime['day'] = int(all_sec / DAY )
10.   uptime['hour'] = int((all_sec % DAY) / HOUR)
11.   uptime['minute'] = int((all_sec % HOUR) / MINUTE)
12.   uptime['second'] = int(all_sec % MINUTE)
13.   uptime['Free rate'] = float(con[1]) / float(con[0])
14.   return uptime

获取网卡流量信息 /proc/net/dev
返回dict,单位byte

1.   #!/usr/bin/env python
2.   def net_stat():
3.   net = []
4.   f = open("/proc/net/dev")
5.   lines = f.readlines()
6.   f.close()
7.   for line in lines[2:]:
8.   con = line.split()
9.   """
10.   intf = {}
11.   intf['interface'] = con[0].lstrip(":")
12.   intf['ReceiveBytes'] = int(con[1])
13.   intf['ReceivePackets'] = int(con[2])
14.   intf['ReceiveErrs'] = int(con[3])
15.   intf['ReceiveDrop'] = int(con[4])
16.   intf['ReceiveFifo'] = int(con[5])
17.   intf['ReceiveFrames'] = int(con[6])
18.   intf['ReceiveCompressed'] = int(con[7])
19.   intf['ReceiveMulticast'] = int(con[8])
20.   intf['TransmitBytes'] = int(con[9])
21.   intf['TransmitPackets'] = int(con[10])
22.   intf['TransmitErrs'] = int(con[11])
23.   intf['TransmitDrop'] = int(con[12])
24.   intf['TransmitFifo'] = int(con[13])
25.   intf['TransmitFrames'] = int(con[14])
26.   intf['TransmitCompressed'] = int(con[15])
27.   intf['TransmitMulticast'] = int(con[16])
28.   """
29.   intf = dict(
30.   zip(
31.   ( 'interface','ReceiveBytes','ReceivePackets',
32.   'ReceiveErrs','ReceiveDrop','ReceiveFifo',
33.   'ReceiveFrames','ReceiveCompressed','ReceiveMulticast',
34.   'TransmitBytes','TransmitPackets','TransmitErrs',
35.   'TransmitDrop', 'TransmitFifo','TransmitFrames',
36.   'TransmitCompressed','TransmitMulticast' ),
37.   ( con[0].rstrip(":"),int(con[1]),int(con[2]),
38.   int(con[3]),int(con[4]),int(con[5]),
39.   int(con[6]),int(con[7]),int(con[8]),
40.   int(con[9]),int(con[10]),int(con[11]),
41.   int(con[12]),int(con[13]),int(con[14]),
42.   int(con[15]),int(con[16]), )
43.   )
44.   )
45.    
46.   net.append(intf)
47.   return net

磁盘空间使用
使用内置python内置函数，返回dict,单位byte

1.   #!/usr/bin/env python
2.   def disk_stat():
3.   import os
4.   hd={}
5.   disk = os.statvfs("/")
6.   hd['available'] = disk.f_bsize * disk.f_bavail
7.   hd['capacity'] = disk.f_bsize * disk.f_blocks
8.   hd['used'] = disk.f_bsize * disk.f_bfree
9.   return hd