Presented without context, for amusement purposes only, a page from my notes:
| FreeBSD | NetBSD | Linux | |
|---|---|---|---|
| Per-process default route |
Poorly documented, possibly incomplete |
Probably not |
Poorly
documented, buggy |
| Can compile PhantomJS | Probably | Probably | Yes |
| Jails | Yes | No | Not really |
| Xen paravirtual guest | Incomplete | Yes | Yes |
| System call tracing | truss | None? | strace |
| pipe2 | Yes | Yes | Yes |
| closefrom | Yes | Yes | No |
| sysctl | Yes | Yes | No |
| getauxval | No | No | Yes |
| signalfd | No | No | Yes |
| execvpe | No | Yes | Yes |
| Reference documentation | Acceptable (YMMV1) | Acceptable (YMMV) | Major gaps |
| Tutorial documentation | Terrible | Terrible | Terrible |
| Package management | Broken as designed | Broken as designed | Good |
| System maintenance automation | I can’t find any | I can’t find any | Acceptable |
| QA reputation | Excellent | Good | Good |
| Security reputation | Good | Good | Debatable |
| Development community | Unknown to me | Unknown to me | Full of assholes |
1 It makes sense to me, but then, I taught myself Unix system programming and administration by reading the SunOS 4 manpages.