1. remove bash as POSIX shell can be used. 2. simplify usage print. 3. add quotes where missing. Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
1. remove bash as POSIX shell can be used. 2. simplify usage print. 3. add quotes where missing. Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>