The os module is a handy module that allows us to get details about the OS. It has a lot of operating system-related utility methods and properties. Run the code below to see details about the operating system.
const os = require('os');
console.log(`Operating System Architecture: ${os.arch()}`);
console.log(`OS Endianness: ${os.endianness()}`);
console.log(`Free System Memory: ${os.freemem()}`);
console.log(`Total System Memory: ${os.totalmem()}`);
console.log(`Platform Details: ${os.platform()}`);
console.log(`Home Directory: ${os.homedir()}`);
console.log(`OS Release: ${os.release()}`);
console.log(`OS Version: ${os.version()}`);
console.log(`OS Type: ${os.type()}`);
console.log(`Hostname: ${os.hostname()}`);
console.log(`Load Averages: ${os.loadavg()}`);
console.log(`OS Temporary Directory: ${os.tmpdir()}`);
console.log(`OS uptime: ${os.uptime()}`);
As you can see, a lot of details can be obtained from the OS module. The OS module is not used very often.
| OS Method | Explanation |
| os.arch() | Returns the OS CPU architecture for which the Node.JS binary was compiled. |
| os.endianness() | Returns the endianness of the CPU for which the Node.JS binary was compiled. |
| os.freemem() | Returns the amount of free system memory in bytes. |
| os.totalmem() | Returns the total amount of system memory in bytes. |
| os.platform() | Returns details identifying the OS platform for the Node.JS binary (set at compile time). |
| os.homedir() | Returns the host name of the OS. |
| os.release() | Returns the operating system. |
| os.version() | Returns the kernel version. |
| os.type() | Returns the OS name (e.g. 'Linux','Darwin','Windows_NT'). |
| os.hostname() | Returns the path of the current user's home directory. |
| os.loadavg() | Returns the 1, 5, and 15 minute load averages (a measure of system activity calculated by the OS expressed as a fractional number). |
| os.tmpdir() | Returns the OS's default directory for temporary files. |
| os.uptime() | Returns the system uptime in number of seconds. |
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