need help in ubuntu Users, Groups and Permissions

Hello Dear, I am a professional Linux engineer and I have a Cisco CCNP certificate. I have great experience in various network technologies such as VLAN, STP, OSPF, EIGRP, BGP, MPLS, etc. Also, I have great hands-on experience in Cisco Routers ASR 9k&1k, ISR 4K, 2900, 2800, 878, 888, Switches Nexus 9K, Cat 6500, 3850, 2900 and ASA 5505, 5506x, 5508. We can discuss it further, let me know if you are interested. Regards, Ahmed Fakkar

Hello dear I can help you in ubuntu commands and resolve your problem but first you must say what you need exactly?

Hi, I am a Ubuntu user, I modified the permission of group and owner often in my folders. I can help you. More specific what do you need?

Hello I am a C programmer and I do bash scripting regularly and software development using linux Ubuntu 18.04.3 LTS OS. What exactly is your problem?