I would talk to the Linux admins you worked with yesterday. It sounds like you have already proved to them you know what you are doing. They may be looking for

I would talk to the Linux admins you worked with yesterday. It sounds like you have already proved to them you know what you are doing. They may be looking for a greenhorn to take in and mentor. If not, they likely have had other Linux admin jobs and know other people in the industry. I would frame it as a way to learn about the industry and make it clear that you are looking for a new role. I would be cautious about asking them for a job straight out because if they aren't in a position to help they might just say no and be done with it. The key to getting a job, especially if your resume isn't conventional, is to skip the automated resume submission entirely.