No command
sbtfound
It's saying that sbt is not on your path. Try to run ./sbt from ~/bin/sbt/bin or wherever the sbt executable is to verify that it runs correctly. Also check that you have execute permissions on the sbt executable. If this works , then add ~/bin/sbt/bin to your path and sbt should run from anywhere.
See this question about adding a directory to your path.
To verify the path is set correctly use the which command on LINUX. The output will look something like this:
$ which sbt
/usr/bin/sbt
Lastly, to verify sbt is working try running sbt -help or likewise. The output with -help will look something like this:
$ sbt -help
Usage: sbt [options]
-h | -help print this message
...