Installing commonly used software

3. Installing commonly used software#

As with any other operating system, there are a large number of applications that are available for Unix. Many of the most common ones are available from online repositories and can be installed by a user with the appropriate privelages. In the case of your STOR-i Ubuntu Virtual Machine you have these privelages and can install any software that takes your fancy !! Lucky you !!

3.1. Adding a repository to the repository list#

To install software we are going to use the apt command. The first thing we need to do is make apt aware of a useful repository called universe. This can be done using the add-apt-repository command.

Try running the following.

add-apt-repository universe

What happened ?

3.2. sudo - run a command as “super user”#

Try running the above command again, but this time prefix it with te sudo command.

sudo add-apt-repository universe

3.3. Adding software from a repository using apt#

There is a useful command called tree. Try running it.

tree

.
├── _config.yml
├── files
│   ├── examples.zip
│   └── matrix.exp.R
├── file-structure.ipynb
├── getting-started.ipynb
├── image-creation.odp
├── images
│   ├── android-architecture.jpg
│   ├── computer-hardware.jpg
│   ├── desktop-applications.jpg
│   ├── desktop-os-statistics.png
│   ├── device-shipment-2015.png
│   ├── file-1453.png
│   ├── file-properties.png
│   ├── file-stdin-stdout-file.png
│   ├── file-stdin-stdout.png
│   ├── linux-kernel-code.png
│   ├── LU-mylab-2026.png
│   ├── LU-mylab.png
│   ├── os-components2.png
│   ├── os-components.png
│   ├── stdin-cmd-file-cmd-stdout.png
│   ├── stdin-cmd-pipe-cmd-stdout.png
│   ├── stdin-stdout-file.png
│   ├── stdin-stdout.png
│   ├── stori-ubuntu-2026.png
│   ├── terminal-icon.png
│   ├── terminal.jpg
│   ├── terminal.png
│   ├── ubuntu-desktop-2026.png
│   ├── ubuntu-lab-desktop.png
│   ├── ubuntu-lab-password.png
│   ├── ubuntu-lab.png
│   ├── ubuntu-lab-start-terminal.png
│   ├── ubuntu-lab-username.png
│   ├── ubuntu-login-2026.png
│   ├── unix-history.png
│   └── waffle-application-launcher.png
├── installing-and-removing-software.ipynb
├── intro.ipynb
├── messages.txt
├── notes.txt
├── processes.ipynb
├── redirection-pipes-tees.ipynb
├── references.ipynb
├── regular-expressions.ipynb
├── scratch.ipynb
├── shell-scripts.ipynb
├── some-basic-unix-commands.ipynb
├── _toc.yml
└── Untitled.ipynb

3 directories, 50 files

What happened ? To install the tree command try this …

sudo apt install tree

Now try running the tree command. What does it do ?

3.3.1. Exercise#

What does this command do ?

R

Install the software package r-base.

Now what does the R command do ?

3.3.2. Exercise#

What would you expect the following to do ?

sudo apt remove tree

Check that it does what you expect.

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