| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | sk | 4 | 1,136 |
| debian | sk | 4 | 636 |
| freebsd | sk | 4 | 624 |
| v7 | sk | 4 | 562 |
| redhat | sk | 4 | 553 |
| php | sk | 4 | 549 |
| bsd | sk | 4 | 540 |
| minix | sk | 4 | 536 |
| xfree86 | sk | 4 | 535 |
| osx | sk | 4 | 532 |
| suse | sk | 4 | 513 |
| posix | sk | 4 | 513 |
| plan9 | sk | 4 | 493 |
| opensolaris | sk | 4 | 493 |
| netbsd | sk | 4 | 469 |
| centos | sk | 4 | 467 |