Posted in 2019

How to prevent interuptions of ssh connections to DKRZ systems?

If your ssh connections to login nodes are interrupted after short periods without any keyboard activitiy and you get an error message containing the string “broken pipe”, try to set the ServerAliveInterval parameter appropriately.

On Linux and macOS systems with the OpenSSH implementation there is essentially two methods to adjust this client setting. First, it can be set as a command-line option to ssh:

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How do I share files with members of another project?

You can use ACLs to achieve this. As a member of project group ax0001, you would have to create a directory in your project’s work for example

It could be any other place on Lustre file systems where you have write access. Then you grant project bx0002 permissions to this directory

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Why do I receive .Xauthority file error messages?

When you open a new terminal session with X forwarding turned on (ssh -X ...), the .Xauthority file in your home directory gets updated by the xauth program. This file is used to keep X authentication keys in order to prevent unauthorized connections to your local display.

Sometimes, the .Xauthority file cannot be updated due to the temporary issues with the Lustre file system, where your home directory is located, and you might experience an error message like:

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