1. The Linux user needs to transfer the system file to another directory but he is unsuccessful in transferring files. He verifies that there is no problem with command and syntax. What is the most likely cause to this unsuccessful transfer of the file and specify how are you going to fix this issue?
2. You're a Linux administrator, there's a problem with one of the Linux users. The Linux system cannot communicate with a network printer. Network cable has no connection issues and the printer has been configured correctly. Briefly explain the appropriate command use to check the status of network interface and check the connectivity between devices using a suitable example? 
3. In Linux, you have installed a new application but when you type in the command to start it you get the error message: Command not found What do you need to do to fix this problem? Justify