You may have tried many icon suites on your Linux desktop but not every icon theme gives you better taste but hopefully this one going to do. Linux-Dark icon pack is designed by dindinG41TR3 user from gnome-look and seem he did nice job on icons, black with green color combination of folders look kind of great with most of the dark themes but also on light themes as well. This icon pack carries around 3500+ icons and compatible with most of the Linux desktop environments such as: Unity, Gnome, Mate, Cinnamon, Xfce, Lxde, and so on. If you encounter any kind of bug, missing icon or issue within this icon pack then report it to creator via linked page and hopefully he will fix it soon since this theme is in active development. Arc theme pack used in the following screenshots. You can use Unity Tweak Tool, Gnome-tweak-tool.
Available for Ubuntu 16.10 Yakkety/16.04 Xenial/17.04/14.04 Trusty/12.04 Precise/Linux Mint 18/17/13/and other Ubuntu based distributions
To install Clarity Icons in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal: