Linux Challenge: Haystack

I did this Linux challenge: Proving Grounds Haystack. It's a server where something went wrong. The goal of this lab is to enumerate the machine, find the files, keys and backups using only Linux commands.

In this lab, I investigated things like where the nginx configuration files are, found the hidden keys, found different nginx config files, investigated a log file and also discovered the backup files on the Linux vps.

Some key commands I ran are cd (change directory), ls (list files and folders), cat to view files, ls -a to find hidden files and several others.