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Docs/Shell: Difference between revisions
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[[Docs|<small>~/Docs</small>]]
Shell is the LUG "pubnix" / multi-tenant server for all members/alumni. It is primarily intended as a sandbox to grant access to a linux environment to newcomers, and enable people to poke around with developing websites.
Shell was first started as a concept in ~2012, where it was called something else. It later adopted the name "shell" on the 2nd/3rd iteration.
When Steven took over LUG in 2022, he copied all the existing /home/*/public_html from the existing shell server at that time to a brand-new shell server, so the web content would not be lost.
In 2023 we once again started a fresh Shell server, but this time did not copy over the old web content.
== Notes for Shell users ==
Shell provides a number of services to users with an account.
You can of course login, and get a shell on the server, which is running Debian. On logging in from off-campus, see the "SSH-Over-TLS" below.
The primary service Shell has is the user webpages. Upon logging in, you will see a "public_html" directory in your home directory. Anything placed in this directory will be available at "<nowiki>https://shell.lug.mtu.edu/~</nowiki><your_username>/". You can look into how websites work on the backend to understand how to make one yourself, if you would like.
Of note, because the webserver runs as the user/group "www-data", you must make sure all files in public_html can be read by www-data. Either by granting every user on the system read-only access (<code>chmod o+r <file></code>), or changing the group to <code>www-data</code> and granting group read access (<code>chmod g+r <file></code>).
Shell also has an IRC bouncer (ZNC) on port 50000, using the same username/password you use to login. ZNC has a web interface if you visit it in a web browser (<nowiki>https://shell.lug.mtu.edu:50000</nowiki>) to more easily configure your settings.
== SSH-Over-TLS ==
* 4AM EST: cronjob recursively makes a snapshot of /home and each user's homedir, prefixed by "Auto".
* 4:15AM EST a cronjob recursively deletes >8th oldest /home snapshot starting with "Auto".
=== Root drives ===
Shell has two 1TB Crucial SSDs RAID'ed together with MDADM in RAID1 to serve as the ESP and the root (<code>/</code>) partition.
Each drive has two partitions, first the ESP (500MB/476MiB), and the root partition second (the rest of the drive; ???GB/931.5GiB).
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