The related code snippet is:

            if [ a$(type -t do_install_ptest) = afunction ]; then
                do_install_ptest
            fi

However, if the host is ubuntu, the check always fail, thus the do_install_ptest not run.

Actually 'type' is a shell built in, we should avoid using it whenever possible.

A simple example showing that using #!/bin/sh and 'type -t' will fail in ubuntu is shown below.

<code>
#!/bin/sh                                                                                                                                                                                                       
func_wrapper() {
    type -t func
}

func() {
    echo "THIS IS FUNC"
}

func_wrapper
</code>

chenqi@pek-qchen1-d1:~/test$ ./test.sh
-t: not found
func is a shell function

//Chen Qi