cd to the directory called final that is located within my home directory. A copy of the group file called mygroup was created using the ! as the field separator. The fields should be separated using a : not a !. Create a single command string that will modify the file called mygroup and change all occurrences of the ! to a :. The command string must also sort the file numerically on the GID field and then save the output to a file called newgroup. Replace the ## in the command string below with the correct characters to make the above described work. sed 's/\!/\:/g' mygroup | sort -t: -k## > ~/newgroup