Unix & Linux: 550 operation not permitted using FTP (3 Solutions!!) - YouTube
FTP create directory: Operation not permitted | TrueNAS Community
How to Install FTP on MacOS Mojave & High Sierra | OSXDaily
Threat Hunting Series : Using Jupyter Notebook Analyzing Excessive Usage of FTP User Scenario | by Rifqi Ardia Ramadhan | MII Cyber Security Consulting Services | Medium
How to Fix FTP Permission Errors on Google Cloud – One Page Zen