1. Get a human-readable ascending list of the sizes of files and subdirectories in your current directory (-sh will sumarize the current directory size)
$ du -sh * | sort -h
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 14.04.3 LTS
Release: 14.04
Codename: trusty
mount -o rw,remount /
$ tar -xf file.tar.gz