RetroFed Forum
Your home away from modern life.
Search Categories Forum list Register Log in
About RetroFed
RetroFed

Welcome to the nostalgia-filled piefed instance of yesteryear.

Open Registration with Application questionnaire.

If you have a question or comment you can post in !meta@retrofed.com or message @DosDude@retrofed.com or @Die4Ever@retrofed.com

In case of downtime and/or emergency, we will post updates on @DosDude@mastodon.social

Some rules we try to uphold:

  • Be civil. Bigotry is not welcome. This includes (but is not limited to): transphobia, queerphobia, racism, ageism and ableism. We do not promote hate.
  • Communities need to be Retro or Retro-adjacent.
  • Please don't upload pornographic content. (use an external image host for that)
72 registered users
Administrators: DosDude, Die4Ever
Visit retrofed.com
pathway mtu discovery bash script
Post Reply RetroFed Forum Forum Index » Bash
AuthorMessage
mastertraitor programming.dev mastertraitor@programming.dev
Joined: 2025-04-30
Quote

Link: https://gist.github.com/bneils/8f337bedebffbe3c1bf2c59def7029d2

I wrote pmtud.sh this weekend to get the MTU of a link (or tunnel) quickly, reliably, and without sending a ton of pings. It can do so in about 11 pings per target.

I had fun writing the entire thing in sh, tried making it "POSIX-compliant," but probably failed somewhere since POSIX isn't worded well. The script only needs dig and ping and uses shell built-ins for everything else. It performs a recursive binary search on the MTU search domain and asynchronously queues pings for later.
1   Original
Post Reply
Back to top
Powered by PieFed · PieBB frontend · All times are Europe/Amsterdam