| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | sk | 4 | 1,101 |
| debian | sk | 4 | 593 |
| freebsd | sk | 4 | 588 |
| v7 | sk | 4 | 528 |
| redhat | sk | 4 | 520 |
| php | sk | 4 | 509 |
| xfree86 | sk | 4 | 504 |
| minix | sk | 4 | 502 |
| bsd | sk | 4 | 501 |
| osx | sk | 4 | 485 |
| suse | sk | 4 | 475 |
| posix | sk | 4 | 470 |
| opensolaris | sk | 4 | 461 |
| plan9 | sk | 4 | 457 |
| centos | sk | 4 | 434 |
| netbsd | sk | 4 | 433 |