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Asked: 2026-05-10T21:45:46+00:00

I’m trying to get information like OS version, hard disk space, disk space available,

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I’m trying to get information like OS version, hard disk space, disk space available, and installed RAM on a Linux system in C++. I know I can use system() to run different Linux commands and capture their output (which is what I’m currently doing) but I was wondering if there’s a better way? Is there something in the C++ standard library that I can use to get information from the operating system?

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  1. If you are using *nix commands via system.

    Then do man scroll to the bottom of the man page and it will usually show you what relevant C system calls are related.

    Example:  man uname: SEE ALSO        uname(2), getdomainname(2), gethostname(2)   Explanation of numbers:  (1): User UNIX Command (2): Unix and C system calls (3): C Library routines (4): Special file names (5): File formats (6):  (7): (8): System admin commands

    So if you are using system(‘uname’). From the man page you can see that there is also a uname C system call (uname(2)). So you can now do a ‘man 2 uname’ to get information about how to use the C system call uname.

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