| OS | Man Page | Section | Hits |
|---|---|---|---|
| freebsd | fd | 4 | 434 |
| minix | fd | 4 | 434 |
| bsd | fd | 4 | 377 |
| linux | fd | 4 | 344 |
| osx | fd | 4 | 342 |
| mojave | fd | 4 | 311 |
| x11r4 | fd | 1 | 311 |
| centos | fd | 4 | 301 |
| debian | fd | 4 | 282 |
| suse | fd | 4 | 281 |
| redhat | fd | 4 | 277 |
| netbsd | fd | 4 | 269 |
| debian | fd | 1 | 258 |
| opendarwin | fd | 4 | 253 |
| hpux | fd | 1 | 247 |
| osf1 | fd | 4 | 246 |
| v7 | fd | 1 | 246 |
| osf1 | fd | 7 | 246 |
| posix | fd | 1 | 244 |
| php | fd | 1 | 243 |
| opensolaris | fd | 7d | 238 |
| xfree86 | fd | 1 | 233 |
| sunos | fd | 7d | 226 |
| plan9 | fd | 1 | 226 |
| sunos | fd | 4 | 183 |
| opensolaris | fd | 4 | 109 |