dnsname(1)

💖 dnsname — bestie edition 💖

okay so this is dnsname(1), a page from the General Commands Manual, and she's here to do exactly one thing and do it gorgeously. reverse lookups. that's her whole personality and honestly? iconic. 🎀

✨ NAME ✨

dnsname — does a reverse lookup for the IP address 🦋

✨ SYNOPSIS ✨

dnsname a.b.c.d

like. that's it. one address. go off. 💅

✨ DESCRIPTION ✨

so here's the tea, bestie: dnsname does a reverse lookup for the IP address a.b.c.d. it prints the first domain name for that address. that's the one. the main character name. 👑

and if there are no domain names listed in DNS for that address? no drama, she just prints a blank line. not an error, not a crisis, just vibes and empty space. 🫶

you can also list several IP addresses at once — she's multi-talented — and dnsname prints each result on a separate line. one per line, clean, organized, lowkey satisfying. ✨

also fyi there's a dnsfilter(1) program that reads IP addresses from its input and performs many reverse lookups in parallel. so if you've got a whole crowd to look up, that's your girl. parallel queen energy. 🧚

🌸 exit statuses (the important part, no cap) 🌸

normally dnsname exits 0. all good. we love that for her. 💖

but — and this is the part where you pay attention — if dnsname encounters a temporary problem that prevents it from determining the domain name, it prints an error message and exits 111. that's the "something went sideways, try again later" number. not a you problem, just a moment. 😭

✨ SEE ALSO ✨

the whole friend group, all linked up 🫶:

• dnsip(1)
• dnsipq(1)
• dnsmx(1)
• dnstxt(1)
• dnsqr(1)
• dnsq(1)
• dnstrace(1)

and the sacred text herself: http://cr.yp.to/djbdns.html ⭐

and that's the whole page, bestie. the footer of this manual is just dnsname(1) — yeah, she really said "my name is enough" and honestly? periodt. 💜