I just installed mtr via Homebrew, and it completed seemingly successfully (i.e., nothing unusual).

MBA% mtr
zsh: command not found: mtr

That's odd. I figured I'd try again:

MBA% brew install mtr
Warning: mtr-0.86 already installed

Okay, maybe it's symlinked as mtr-0.86:

MBA% mtr-0.86
zsh: command not found: mtr-0.86

Nope, okay, maybe it just failed to link:

MBA% brew link mtr
Warning: Already linked: /usr/local/Cellar/mtr/0.86
To relink: brew unlink mtr && brew link mtr
MBA% brew unlink mtr && brew link mtr
Unlinking /usr/local/Cellar/mtr/0.86... 3 symlinks removed
Linking /usr/local/Cellar/mtr/0.86... 2 symlinks created
MBA% mtr zsh: command not found: mtr


MBA% /usr/local/Cellar/mtr/0.86/sbin/mtr

What's going on? Why is Homebrew failing to link (and creating fewer symlinks on relinking for that matter..)?

  • 1
    (Keen-eyed may note that mtr needs root. Yes. By [Success] I mean it complained about just that, rather than failing to even run.)
    – OJFord
    Jun 8, 2015 at 13:22

3 Answers 3


I saw the same when installing brew 0.86. While most binaries get linked to /usr/local/bin, brew get's linked to /usr/local/sbin. This is absolutely right but you need to extend your path in order to avoid typing the whole path.

export PATH="/usr/local/bin:/usr/local/sbin:~/bin:$PATH"

will fix it once and you will need to adjust your .bash_profile to fix it permanently


For mtr v0.86 and below:

brew install mtr
ln /usr/local/Cellar/mtr/0.86/sbin/mtr /usr/local/bin/mtr
sudo mtr superuser.com

But since mtr v0.87 one more command is needed:

ln /usr/local/Cellar/mtr/0.92/sbin/mtr-packet /usr/local/bin/mtr-packet
  • 2
    Actually mtr was already in /usr/local/sbin. The solution of adding /usr/local/sbin to the PATH is better.
    – Tuanitim
    Mar 8, 2017 at 10:15

Add /usr/local/sbin to current PATH variable and make persistent.

export PATH="/usr/local/bin:/usr/local/sbin:~/bin:$PATH"
sudo echo '/usr/local/sbin' >> /etc/paths

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.