| Index | Method | Description |
| 1 | os.arch() | This method is used to fetch the operating system CPU architecture. |
| 2 | os.cpus() | This method is used to fetch 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). |
| 3 | os.endianness() | This method returns the endianness of the cpu. Its possible values are 'BE' for big endian or 'LE' for little endian. |
| 4 | os.freemem() | This methods returns the amount of free system memory in bytes. |
| 5 | os.homedir() | This method returns the home directory of the current user. |
| 6 | os.hostname() | This method is used to returns the hostname of the operating system. |
| 7 | os.loadavg() | This method returns an array containing the 1, 5, and 15 minute load averages. The load average is a time fraction taken by system activity, calculated by the operating system and expressed as a fractional number. |
| 8 | os.networkinterfaces() | This method returns a list of network interfaces. |
| 9 | os.platform() | This method returns the operating system platform of the running computer i.e.'darwin', 'win32','freebsd', 'linux', 'sunos' etc. |
| 10 | os.release() | This method returns the operating system release. |
| 11 | os.tmpdir() | This method returns the operating system's default directory for temporary files. |
| 12 | os.totalmem() | This method returns the total amount of system memory in bytes. |
| 13 | os.type() | This method returns the operating system name. For example 'linux' on linux, 'darwin' on os x and 'windows_nt' on windows. |
| 14 | os.uptime() | This method returns the system uptime in seconds. |
| 15
| os.userinfo([options])
| This method returns a subset of the password file entry for the current effective user. |