I'll copy my SO answer here:

In Ubuntu the trash files are kept in ~/.local/share/Trash/files

There is a trash command line interface that you can use. To install do:

sudo apt-get install trash-cli

Then, to trash something do:

trash-put myfile.txt

I'll copy my SO answer here:

In Ubuntu the trash files are kept in ~/.local/share/Trash/files

There is a trash command line interface that you can use. To install do:

sudo apt-get install trash-cli

Then, to trash something do:

trash-put myfile.txt