Install Arc Icon Theme

I used these steps to install the Arc icons on Debian 9 Mate, but judging by the steps, you should be able to run this on other distros.

# Install git in case you havent got it already
sudo apt install git -y

# Use git to clone the git repository and go into it.
git clone https://github.com/horst3180/arc-icon-theme --depth 1
cd arc-icon-theme

# Install the autoreconf package so you can then run autogen
sudo apt-get install dh-autoreconf
./autogen.sh --prefix=/usr

# Install (move files to relevant place and set up symlinks)
sudo make install

After that, if you are using Debian Mate, apply the icons by:

1. Go to System > Preferences > Look and feel > Appearance.
2. Click on your theme and then the Customise... button.
3. Click the Icons tab (3rd tab).
4. Select Arc and then close.

References

• Github - Arc Icon Theme
• Github Issue - ./autogen.sh: 10: ./autogen.sh: autoreconf: not found