Worker
Highly configurable two-paned file manager for X
Worker is a two-pane file manager for the X Window System on UN*X. The directories and files are shown in two independent panels supporting a lot of advanced file manipulation features. The main focus is to make managing files easy with full keyboard control, also assisting in finding files and directories by using history of accessed directories, live filtering, and access to commands by using the keyboard.
Worker is a file manager much like the Amiga's DirOpus. It can be controlled with mouse or keyboard. There is no restriction on the number or type of button functions. Files are recognized by both extension and content, content by recognizing common bytes in the sample files you show it. Drag & Drop is supported. . If xli or imagemagick is installed, it quickly previews pictures in the opposite pane. If x11-utils is installed, xmessage is used to display some informative messages.
How to install Worker in Ubuntu
If you are on a supported distro, you can install the application through software center by clicking the below link.
If the above link not working, run the below command in terminal to install worker in Ubuntu
sudo apt install worker