A command-line clipboard copy and paste utility?

xsel

I am using xsel Install xsel, but I am only using it with plain text and unicode text.

xsel can copy and paste to three different "clipboards".

By default, it uses the X Window System primary selection, which is basically whatever is currently in selection. The X Window System also has a secondary selection (which isn't used much), and a clipboard selection. You're probably looking for the clipboard selection, since that's what the desktop environment (e.g. Gnome, KDE, XFCE) uses for its clipboard. To use that with xsel:

xsel --clipboard < new-clipboard-contents.txt
xsel --clipboard > current-clipboard-contents.txt

xclip

Install xclip may be one of your choices.

cat samples.sh | xclip -sel clip

you can also setting it in the .bashrc file using alias.

alias clipboard='xclip -sel clip'

The key to paste binary data to a file with xclip is to tell what Media Types you have on clipboard. For PNG you can:

xclip -selection clipboard -t image/png -o > "`date '+%Y-%m-%d_%T'`.png"

So now on ~/Dropbox/.mybashrc ;) you can add an alias (clipboard2photo) to easily paste to image file (maybe someday we'll have it on Nautilus).

Parcellite

I've used parcellite for many years as a clipboard manager. It runs in the Notification Area and offers many options for managing both Primary Selection and standard freedesktop.org Clipboard.

It's been my answer to managing clipboard items.