
echo "Szukanie powok w katalogach cieki przeszukiwania..."

for check_for in sh bash ksh csh tcsh zsh ash 
do
    cmd="$check_for -c exit"

    if ($cmd > /dev/null 2> /dev/null) then
       echo "Jest $check_for."
    else
        echo "BRAK $check_for."
    fi
done
