LINUX please write down the commands for the following questions: redirect file1 to file2 redirect file1 and file2 to file2. What contents will file2 have? Why? Append file1 to the end of file2 Search a file named file1 from the root and redirect the error message to /dev/null Run the commands ls, and echo hello in one line Use a pipeline to view contents of list and convert all lowercase a to uppercase A How to run a command in background? How to move a job from the foreground to the background How to move a job from the background to the foreground Assume the following files are in the working directory:.