Maybe my advises are more abstract than what you are hoping for, but this is what I learnt after 15 years being a sysadmin.
- The good sysadmin is not the one who makes difficult things, is the one who makes the things easy. If one you find yourself wanting to recompile a Linux Kernel, probably you are taking a really bad approach for the problem.
- Document, document, document. Think about the bus factor. If a junior sysadmin is able to rebuild and manage your infrastructure using your documentation, you are doing the things in the right way.
- Never make an step forward without a backup plan. If you are going to make changes in the production servers, always have a plan B in case something goes wrong. Doing an `apt-get update` and hope that everything will be ok, is not a good policy.
- Always remember that your job is to serve the other departments, so they can do awesome things. If too many people in the company knows your name, you are doing something wrong.
- The good sysadmin is not the one who makes difficult things, is the one who makes the things easy. If one you find yourself wanting to recompile a Linux Kernel, probably you are taking a really bad approach for the problem.
- Document, document, document. Think about the bus factor. If a junior sysadmin is able to rebuild and manage your infrastructure using your documentation, you are doing the things in the right way.
- Never make an step forward without a backup plan. If you are going to make changes in the production servers, always have a plan B in case something goes wrong. Doing an `apt-get update` and hope that everything will be ok, is not a good policy.
- Always remember that your job is to serve the other departments, so they can do awesome things. If too many people in the company knows your name, you are doing something wrong.