1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
# OS
> Stability: 2 - Stable
Provides a few basic operating-system related utility functions.
Use `require('os')` to access this module.
## os.EOL
<!-- YAML
added: v0.7.8
-->
A constant defining the appropriate End-of-line marker for the operating
system.
## os.arch()
<!-- YAML
added: v0.5.0
-->
Returns the operating system CPU architecture. Possible values are `'x64'`,
`'arm'` and `'ia32'`. Returns the value of [`process.arch`][].
## os.cpus()
<!-- YAML
added: v0.3.3
-->
Returns an array of objects containing information about each CPU/core
installed: model, speed (in MHz), and times (an object containing the number of
milliseconds the CPU/core spent in: user, nice, sys, idle, and irq).
Example inspection of os.cpus:
```js
[ { model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 252020,
nice: 0,
sys: 30340,
idle: 1070356870,
irq: 0 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 306960,
nice: 0,
sys: 26980,
idle: 1071569080,
irq: 0 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 248450,
nice: 0,
sys: 21750,
idle: 1070919370,
irq: 0 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 256880,
nice: 0,
sys: 19430,
idle: 1070905480,
irq: 20 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 511580,
nice: 20,
sys: 40900,
idle: 1070842510,
irq: 0 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 291660,
nice: 0,
sys: 34360,
idle: 1070888000,
irq: 10 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 308260,
nice: 0,
sys: 55410,
idle: 1071129970,
irq: 880 } },
{ model: 'Intel(R) Core(TM) i7 CPU 860 @ 2.80GHz',
speed: 2926,
times:
{ user: 266450,
nice: 1480,
sys: 34920,
idle: 1072572010,
irq: 30 } } ]
```
Note that since `nice` values are UNIX centric in Windows the `nice` values of
all processors are always 0.
## os.endianness()
<!-- YAML
added: v0.9.4
-->
Returns the endianness of the CPU. Possible values are `'BE'` for big endian
or `'LE'` for little endian.
## os.freemem()
<!-- YAML
added: v0.3.3
-->
Returns the amount of free system memory in bytes.
## os.homedir()
<!-- YAML
added: v2.3.0
-->
Returns the home directory of the current user.
## os.hostname()
<!-- YAML
added: v0.3.3
-->
Returns the hostname of the operating system.
## os.loadavg()
<!-- YAML
added: v0.3.3
-->
Returns an array containing the 1, 5, and 15 minute load averages.
The load average is a measure of system activity, calculated by the operating
system and expressed as a fractional number. As a rule of thumb, the load
average should ideally be less than the number of logical CPUs in the system.
The load average is a very UNIX-y concept; there is no real equivalent on
Windows platforms. That is why this function always returns `[0, 0, 0]` on
Windows.
## os.networkInterfaces()
<!-- YAML
added: v0.6.0
-->
Get a list of network interfaces:
```js
{ lo:
[ { address: '127.0.0.1',
netmask: '255.0.0.0',
family: 'IPv4',
mac: '00:00:00:00:00:00',
internal: true },
{ address: '::1',
netmask: 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff',
family: 'IPv6',
mac: '00:00:00:00:00:00',
internal: true } ],
eth0:
[ { address: '192.168.1.108',
netmask: '255.255.255.0',
family: 'IPv4',
mac: '01:02:03:0a:0b:0c',
internal: false },
{ address: 'fe80::a00:27ff:fe4e:66a1',
netmask: 'ffff:ffff:ffff:ffff::',
family: 'IPv6',
mac: '01:02:03:0a:0b:0c',
internal: false } ] }
```
Note that due to the underlying implementation this will only return network
interfaces that have been assigned an address.
## os.platform()
<!-- YAML
added: v0.5.0
-->
Returns the operating system platform. Possible values are `'darwin'`,
`'freebsd'`, `'linux'`, `'sunos'` or `'win32'`. Returns the value of
[`process.platform`][].
## os.release()
<!-- YAML
added: v0.3.3
-->
Returns the operating system release.
## os.tmpdir()
<!-- YAML
added: v0.9.9
-->
Returns the operating system's default directory for temporary files.
## os.totalmem()
<!-- YAML
added: v0.3.3
-->
Returns the total amount of system memory in bytes.
## os.type()
<!-- YAML
added: v0.3.3
-->
Returns the operating system name. For example `'Linux'` on Linux, `'Darwin'`
on OS X and `'Windows_NT'` on Windows.
## os.uptime()
<!-- YAML
added: v0.3.3
-->
Returns the system uptime in seconds.
[`process.arch`]: process.html#process_process_arch
[`process.platform`]: process.html#process_process_platform
|
