| OS | Man Page | Section | Hits |
|---|---|---|---|
| redhat | pf | 4 | 1,119 |
| centos | pf | 4 | 976 |
| linux | pf | 4 | 439 |
| freebsd | pf | 4 | 359 |
| netbsd | pf | 4 | 247 |
| osx | pf | 4 | 221 |
| debian | pf | 4 | 213 |
| plan9 | pf | 4 | 209 |
| mojave | pf | 4 | 201 |
| opensolaris | pf | 4 | 171 |
| minix | pf | 4 | 168 |
| xfree86 | pf | 4 | 162 |
| v7 | pf | 4 | 156 |
| x11r4 | pf | 4 | 152 |
| php | pf | 4 | 149 |
| bsd | pf | 4 | 149 |
| hpux | pf | 4 | 143 |
| suse | pf | 4 | 139 |
| osf1 | pf | 4 | 132 |
| opendarwin | pf | 4 | 128 |