Command Line Clipboard Access

Well, there are a few different clipboards in X :) The one xclip copies text into by default is "selection buffer" - usually you just select some text with your mouse and then can paste it with middle mouse button. This buffer is separate from the one from which you can paste with Ctrl-Shift-V.

Try

echo "hello" | xclip -selection clipboard

also, see

man xclip

for more details about xclip

To make it easier for myself I created an alias for xclip in order to mimic the functionality of pbcopy and and pbpaste in Mac OS X.

sudo apt-get install xclip -y

Then edit your ~/.bashrc to add aliases:

nano ~/.bashrc

Add these new lines (you could put them at the end of the file):

alias pbcopy='xclip -selection clipboard'
alias pbpaste='xclip -selection clipboard -o'

Save and exit, then open a new shell or run source ~/.bashrc to use the aliases.

My blog post contains further details.

I used to use the utilities wxcopy and wxpaste from windowmaker, but recent Linux versions (or X versions) seem to have broken them - I suspect security has been tightened up and they have not been updated to match. E.g. you could do things like:

echo fred | wxcopy | tr "a-z" "A-Z" | wxpaste

to get the output FRED. (It's a contrived example, since you'd get the same thing without the final wxpaste, but I think it gives the flavour of what you can achieve.)

However, you can achieve the same effect using the "xcb" package, which is incredibly lightweight and also provides a tiny (summarised) visual display of 8 clipboards.

I wrote a pair of shell scripts wcopy/wpaste years ago, to make wxcopy/wxpaste a bit more pleasant to my taste. I updated them tonight to work with either wxcopy/wxpaste or xcb. That makes them a bit more complex than they need to be, but I'll paste them in here - hopefully they're not too long for this forum.

Here's wcopy:

#!/bin/sh
#
# Provide some enhancements to the wxcopy command, which copies standard input
# to an X11 clipboard text buffer.
#
# Allow copying from stdin to any of the cutbuffers.  Note that they are
# indexed counting from 0.
#
# Author: Luke Kendall
#

if [ `uname -s` = "Darwin" ]
then
    WXCOPY=pbcopy
    WXPASTE=pbpaste
else
    WXCOPY=wxcopy
    WXPASTE=wxpaste
    BUFSPEC="-cutbuffer"
    xcb -p 0 > /tmp/wc$$
    if echo "fred$$" | wxcopy -cutbuffer 0 && [ `wxpaste` = "fred$$" ]
    then
        : # Great, they're actually working.  Not common on modern Linuxes.
        echo "working" > $HOME/.wcopyok
    else
        rm -f $HOME/.wcopyok
        WXCOPY="xcb -s"
        WXPASTE="xcb -p"
        BUFSPEC=
    fi
    xcb -s 0 < /tmp/wc$$
fi

unset WXARGS
if [ $# = 0 ]
then
    $WXCOPY ${WXCOPY_DEFS:-0}
else
    MYNAME=`basename $0`
    USAGE="usage: $MYNAME [ [0-9]... ] [$WXCOPY's args]"
    numlist=true
    for n
    do
        if $numlist && expr "x$n" : 'x[0-9][0-9]*$' > /dev/null
        then
            NUMARGS="$NUMARGS $n"
        else
            numlist=false
            if [ "x$n" = "x-h" ]
            then
                echo "$USAGE" >&2
                exit 0
            else
                WXARGS="$WXARGS $n"
            fi
        fi
    done
    set - $NUMARGS
    $WXCOPY $WXCOPY_DEFS $WXARGS $BUFSPEC $1
    ORIG="$1"
    shift
    for n
    do
        $WXPASTE $BUFSPEC $ORIG | $WXCOPY $WXCOPY_DEFS $WXARGS $BUFSPEC $n
    done
fi

And here's wpaste:

#!/bin/sh
#
# Provide some enhancements to the wxpaste command, which pastes from X11
# clipboard text buffers to standard output.
#
# Allow pasting to stdout from any of the cutbuffers.  Note that they are
# indexed counting from 0.
#
# Author: Luke Kendall
#

if [ `uname -s` = "Darwin" ]
then
    WXCOPY=pbcopy
    WXPASTE=pbpaste
else
    WXCOPY=wxcopy
    WXPASTE=wxpaste
    BUFSPEC="-cutbuffer"
    if [ -s $HOME/.wcopyok ]
    then
        : # Great, they're actually working.  Not common on modern Linuxes.
    else
        WXCOPY="xcb -s"
        WXPASTE="xcb -p"
        BUFSPEC=
    fi
fi

if [ $# = 0 ]
then
    $WXPASTE ${WXPASTE_DEFS:-0}
else
    MYNAME=`basename $0`
    USAGE="usage: $MYNAME [ [0-9]... ] [$WXPASTE's args]"
    for n
    do
        if expr "x$n" : 'x[0-9][0-9]*$' > /dev/null
        then
            NUMARGS="$NUMARGS $n"
        elif [ "x$n" = "x-h" ]
        then
            echo "$USAGE" >&2
            exit 0
        else
            WXARGS="$WXARGS $n"
        fi
    done
    set - $NUMARGS
    : echo "Num args: $#"
    for n
    do
        : echo "Doing: $WXPASTE $WXPASTE_DEFS $WXARGS $BUFSPEC $n"
        $WXPASTE $WXPASTE_DEFS $WXARGS $BUFSPEC $n
    done
fi

If anyone's interested, I wrote man pages for the scripts, too - but you can probably find them (they're still valid) by googling wcopy.1x and wpaste.1x