Instalasi virtualenv di xubuntu

ardianta@imajinasi:~$ sudo apt-cache virtualenv
[sudo] password for ardianta:
E: Invalid operation virtualenv
ardianta@imajinasi:~$ sudo apt-cache search virtualenv
dh-virtualenv - wrap and build python packages using virtualenv
python-pip - alternative Python package installer
python-pip-whl - alternative Python package installer
python-tox - virtualenv-based automation of test activities
python-virtualenv - Python virtual environment creator
python3-pip - alternative Python package installer - Python 3 version of the package
python3-virtualenv - Python virtual environment creator
virtualenv - Python virtual environment creator
virtualenv-clone - script for cloning a non-relocatable virtualenv
virtualenvwrapper - extension to virtualenv for managing multiple virtual Python environments
ardianta@imajinasi:~$ sudo apt-get install virtualenv
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libming1 linux-headers-3.16.0-23 linux-headers-3.16.0-23-generic linux-image-3.16.0-23-generic
  linux-image-extra-3.16.0-23-generic python3-bs4 python3-markdown python3-pygments python3-yaml
  wine-mono4.5.2 wkhtmltopdf
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  python-chardet-whl python-colorama-whl python-distlib-whl python-html5lib-whl python-pip-whl
  python-requests-whl python-setuptools-whl python-six-whl python-urllib3-whl python3-virtualenv
The following NEW packages will be installed:
  python-chardet-whl python-colorama-whl python-distlib-whl python-html5lib-whl python-pip-whl
  python-requests-whl python-setuptools-whl python-six-whl python-urllib3-whl python3-virtualenv virtualenv
0 upgraded, 11 newly installed, 0 to remove and 80 not upgraded.
Need to get 1.144 kB of archives.
After this operation, 1.676 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python-chardet-whl all 2.2.1-2 [170 kB]
Get:2 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python-colorama-whl all 0.3.1-0.1 [20,0 kB]
Get:3 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python-distlib-whl all 0.1.9-1 [141 kB]
Get:4 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python-html5lib-whl all 0.999-3 [109 kB]
Get:5 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python-six-whl all 1.7.3-2 [12,1 kB]
Get:6 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python-urllib3-whl all 1.8.3-1 [64,9 kB]
Get:7 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python-requests-whl all 2.3.0-1 [227 kB]
Get:8 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python-setuptools-whl all 5.5.1-1 [231 kB]
Get:9 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python-pip-whl all 1.5.6-2 [111 kB]
Get:10 http://id.archive.ubuntu.com/ubuntu/ utopic/universe python3-virtualenv all 1.11.6-2 [51,6 kB]
Get:11 http://id.archive.ubuntu.com/ubuntu/ utopic/universe virtualenv all 1.11.6-2 [6.038 B]
Fetched 1.144 kB in 6s (172 kB/s)
Selecting previously unselected package python-chardet-whl.
(Reading database ... 326564 files and directories currently installed.)
Preparing to unpack .../python-chardet-whl_2.2.1-2_all.deb ...
Unpacking python-chardet-whl (2.2.1-2) ...
Selecting previously unselected package python-colorama-whl.
Preparing to unpack .../python-colorama-whl_0.3.1-0.1_all.deb ...
Unpacking python-colorama-whl (0.3.1-0.1) ...
Selecting previously unselected package python-distlib-whl.
Preparing to unpack .../python-distlib-whl_0.1.9-1_all.deb ...
Unpacking python-distlib-whl (0.1.9-1) ...
Selecting previously unselected package python-html5lib-whl.
Preparing to unpack .../python-html5lib-whl_0.999-3_all.deb ...
Unpacking python-html5lib-whl (0.999-3) ...
Selecting previously unselected package python-six-whl.
Preparing to unpack .../python-six-whl_1.7.3-2_all.deb ...
Unpacking python-six-whl (1.7.3-2) ...
Selecting previously unselected package python-urllib3-whl.
Preparing to unpack .../python-urllib3-whl_1.8.3-1_all.deb ...
Unpacking python-urllib3-whl (1.8.3-1) ...
Selecting previously unselected package python-requests-whl.
Preparing to unpack .../python-requests-whl_2.3.0-1_all.deb ...
Unpacking python-requests-whl (2.3.0-1) ...
Selecting previously unselected package python-setuptools-whl.
Preparing to unpack .../python-setuptools-whl_5.5.1-1_all.deb ...
Unpacking python-setuptools-whl (5.5.1-1) ...
Selecting previously unselected package python-pip-whl.
Preparing to unpack .../python-pip-whl_1.5.6-2_all.deb ...
Unpacking python-pip-whl (1.5.6-2) ...
Selecting previously unselected package python3-virtualenv.
Preparing to unpack .../python3-virtualenv_1.11.6-2_all.deb ...
Unpacking python3-virtualenv (1.11.6-2) ...
Selecting previously unselected package virtualenv.
Preparing to unpack .../virtualenv_1.11.6-2_all.deb ...
Unpacking virtualenv (1.11.6-2) ...
Processing triggers for man-db (2.7.0.2-2) ...
Setting up python-chardet-whl (2.2.1-2) ...
Setting up python-colorama-whl (0.3.1-0.1) ...
Setting up python-distlib-whl (0.1.9-1) ...
Setting up python-html5lib-whl (0.999-3) ...
Setting up python-six-whl (1.7.3-2) ...
Setting up python-urllib3-whl (1.8.3-1) ...
Setting up python-requests-whl (2.3.0-1) ...
Setting up python-setuptools-whl (5.5.1-1) ...
Setting up python-pip-whl (1.5.6-2) ...
Setting up python3-virtualenv (1.11.6-2) ...
Setting up virtualenv (1.11.6-2) ...