Add basic linux troubleshooting tips

[samfreund]

Description

This is a PR that I copied over from the old docs repo. It contains basic troubleshooting tips.

closes #1365

fixes #1366

Meta

Merge checklist:

• Pull Request title is short, imperative summary of proposed changes
• The description documents the what and why
• If this PR changes behavior or adds a feature, user documentation is updated
• If this PR touches photon-serde, all messages have been regenerated and hashes have not changed unexpectedly
• If this PR touches configuration, this is backwards compatible with settings back to v2024.3.1
• If this PR addresses a bug, a regression test for it is added
• Add journalctl
• Add systemctl
• add sftp as alt to scp

[Gold856]

Needs journalctl commands

[samfreund]

Needs journalctl commands

dang bro, check the list

[Gold856]

I did. If you're attempting to close #1366, this needs journalctl commands.

[samfreund]

I did. If you're attempting to close #1366, this needs journalctl commands.

Oh it's still open lol. I need to finish it up, I didn't realize I forgot to convert to draft.

Matt says ship it, and I added the things you asked for.