Você pode instalar megatools assim
git clone https://github.com/megous/megatools.git
cd megatools/
sudo apt-get install libtool libglib2.0-dev gobject-introspection libgmp3-dev nettle-dev asciidoc glib-networking#(these are the dependancies I needed, you may need others)
./autogen.sh
make
sudo make install
Aproveite!
Modo mais robusto que parece instalar todas as ferramentas:
sudo apt-get install libtool libglib2.0-dev gobject-introspection libgmp3-dev nettle-dev asciidoc glib-networking
wget http://megatools.megous.com/builds/megatools-1.9.94.tar.gz
zcat megatools-1.9.94.tar.gz > megatools-1.9.94.tar
tar -xf megatools-1.9.94.tar
cd megatools-1.9.94/
./configure
make
sudo make install
Editar Para instalar apenas o binário em vivid e wily (15.04 / 15.10), você pode executar apenas sudo apt-get install megatools . Em versões anteriores, você pode executar
sudo add-apt-repository ppa:megous/ppa
sudo apt-get update
sudo apt-get install megatools
Do Leiame :
Tools
=====
megareg Register and verify a new mega account
megadf Show your cloud storage space usage/quota
megals List all remote files
megamkdir Create remote directory
megarm Remove remote file or directory
megamv Move and rename remote files
megaput Upload individual files
megaget Download individual files
megadl Download file from a "public" Mega link
(doesn't require login)
megastream Streaming download of a file
(can be used to preview videos or music)
megasync Upload or download a directory tree
megafs Mount remote filesystem locally.
Veja também o link