Please go to the directory exercise_5.
Unzipping compressed files is a very basic and important task. On Unix, you often encounter WinZip archives, .tar archives, and .gz compressed files. For unpacking Win zip files, use
unzip <filename>
for .tar and .tar.gz files
tar -xf <filename>
and for .gz files,
gunzip <filename>
The 14th and 15th character of the solution are in a multiply wrapped archive in the exercise_5 directory.
To pack a directory and everything within, you can use the command
tar -cf backup.tar <directory>
To subsequently compress it, use
gzip backup.tar