For what it's worth I had asked someone the very same question when I started my career. From the horses mouth take a look at ext4 on ubuntu https://help.ubunt

For what it's worth I had asked someone the very same question when I started my career. From the horses mouth take a look at ext4 on ubuntu https://help.ubuntu.com/community/LinuxFilesystemsExplained https://help.ubuntu.com/community/LinuxFilesystemsExplained Then a 10,000 mile view, I'd take a look at UNIX and Linux https://www.amazon.com/UNIX-Linux-System-Administration-Handbook/dp/0131480057 https://www.amazon.com/UNIX-Linux-System-Administration-Hand... There are more books I could list and papers on FileSystems. I will leave you with three particular books that have guided my career If you want to look solely at Ubuntu. The Ubuntu Server book https://www.amazon.com/Official-Ubuntu-Server-Book-3rd/dp/0133017532/ref=sr_1_1?s=books&ie=UTF8&qid=1484949251&sr=1-1&keywords=ubuntu+server+book https://www.amazon.com/Official-Ubuntu-Server-Book-3rd/dp/01... Unix Made Easy - https://www.amazon.com/UNIX-Made-Easy-John-Muster/dp/007219314X/ref=sr_1_1?s=books&ie=UTF8&qid=1484949540&sr=1-1&keywords=unix+made+easy https://www.amazon.com/UNIX-Made-Easy-John-Muster/dp/0072193... Hope this helps