Code provided in the official webpage not working.
My Os is Ubuntu Mate
from keyman.com
“sudo apt-get install keyman ibus-keyman onboard”
Error: Reading package lists… Done
*Building dependency tree * Reading state information… Done Package ibus-keyman is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source
E: Package ‘ibus-keyman’ has no installation candidate