What Is man7.org?

man7.org is the personal and project site of Michael Kerrisk, best known as the longtime maintainer of the Linux man-pages project. It hosts one of the most widely used collections of online Linux/Unix manual pages, along with information about his book The Linux Programming Interface, training courses, conference presentations, articles, and a blog. It is a reference and learning resource, not a commercial software product.

What you'll find on the site

The homepage lists the main sections:

• Online manual pages — browsable Linux/Unix man pages, the most common reason people land on the site.
• The Linux Programming Interface — the book by Michael Kerrisk covering Linux and UNIX system programming.
• The man-pages project — the upstream project that maintains the Linux man pages.
• Training courses — courses taught by Kerrisk.
• Conference presentations — talks and slides.
• Articles and a Blog.
• About and Contact and Impressum pages.

When to use it

Use man7.org when you need to look up the exact behavior, options, or return values of a Linux system call, C library function, or command, or when you want authoritative documentation rather than a summary. It's also useful if you're studying Linux system programming and want material tied to The Linux Programming Interface.

What it is not

It is not a general Linux tutorial site or a distribution-specific knowledge base. The content centers on manual pages and Kerrisk's own projects and writing. If you need distro-specific configuration guides, vendor documentation is a better fit.

Practical note

The site is in English and is organized around reference material, so expect terse, precise pages rather than step-by-step walkthroughs. For a quick lookup, the online manual pages section is the fastest entry point; for deeper study, the book and articles sections are the place to start.