Question 1: How do I make a file to be read-write-executable by me, read-executabme by group and readable by everybody? (Command in unix)
Question 2: How do I add the command ls -al / as the first line of a file (without using an editor)?
Question 3: How do I execute that file?
Question 4: How do I add command eat 10 as the second line of that file? (without using the editor)