[linux] How to show a GUI message box from a bash script in linux?

Here's a little Tcl script that will do what you want. The Wish interpreter should be installed by default on Ubuntu.

#!/usr/bin/wish
pack [label .msg -text [lindex $argv 0]]
pack [entry .ent]
bind .ent <KeyPress-Return> { puts [.ent get]; destroy . }
focus .ent

Call it like this:

myanswer=`gui-prompt "type your answer and press enter"`

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