1. Bash history allows an administrator to see a list of commands recently executed on the server, which comes in handy when looking at what was done to solve an issue in the past or trying to cross-reference recent issues to recently executed commands
2. A successful root cause analysis assists in the troubleshooting process as it can provide an overview of the underlying issue or initial cause of disruption
3. A description of the issue, the related application or hardware, what was discovered during the process, and what was done to resolve it
4. /var
5. head, tail, less
6. nslookup, dig, host
7. spci