# xsel
#
# X11 selection and clipboard manipulation tool.

# Use a command's output as input of the clip[b]oard (equivalent to Ctrl + C):
echo 123 | xsel -ib

# Use the contents of a file as input of the clipboard:
cat file | xsel -ib

# Output the clipboard's contents into the terminal (equivalent to Ctrl + V):
xsel -ob

# Output the clipboard's contents into a file:
xsel -ob > file

# Clear the clipboard:
xsel -cb

# Output the X11 primary selection's contents into the terminal (equivalent to a mouse middle-click):
xsel -op