Content tagged with "Linux"

I recently needed to migrate some user data from one Ubuntu server to another. It was not possible for me to clone the full disk so I opted to copy the user data and re-create the user accounts on the other machine.

I used rsync to copy all the user data and preserve all permissions on the files. I needed sudo access on both sides.

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A few days ago I started getting “your credentials are invalid” messages from my existing email accounts when trying to connect to the University of Warwick email servers. I hadn’t changed my configuration or my password so I assumed they had changed something their side. It turns out that they have disabled what they call “legacy methods” for connecting to your email account.

The advice is to “Please update to a client that supports more modern methods of authentication or use alternatively Webmail.” which isn’t all that helpful. Also IMAP is still modern and not considered ’legacy’, that’s why a lot of the big web mail providers like Gmail, proton mail, yahoo mail and heck, even Microsoft/hotmail still support it. Anyway, I won’t rant…

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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 too.

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