25 lines
1.2 KiB
Markdown
25 lines
1.2 KiB
Markdown
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---
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title: Why is Tmux crashing on start?
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author: James
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type: post
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date: 2018-11-07T07:40:45+00:00
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url: /2018/11/07/why-is-tmux-crashing-on-start/
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medium_post:
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- 'O:11:"Medium_Post":11:{s:16:"author_image_url";N;s:10:"author_url";N;s:11:"byline_name";N;s:12:"byline_email";N;s:10:"cross_link";s:2:"no";s:2:"id";N;s:21:"follower_notification";s:3:"yes";s:7:"license";s:19:"all-rights-reserved";s:14:"publication_id";s:2:"-1";s:6:"status";s:4:"none";s:3:"url";N;}'
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categories:
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- Open Source
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tags:
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- linux
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- script
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- tmux
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---
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I spent several hours trying to get to the bottom of why tmux was crashing as soon as I ran it on Fedora. It turns out there’s a simple fix. When tmux starts it uses /dev/ptmx to create a new TTY (virtual terminal) that the user can interact with. If your user does not have permission to access this device then tmux will silently die. A good way to verify this is to try running [screen][1] too.
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In my case I realised that my user was not a member of the user group “tty” on my system. The answer was therefore simple:
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<pre>sudo usermod -a -G tty james</pre>
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I hope this helps someone avoid spending hours searching for the right incantation.
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[1]: https://en.wikipedia.org/wiki/GNU_Screen
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