add_alias is a function
add_alias ()
{
    if [ $# -lt 2 ]; then
        printf '\nUSAGE:#=> \t add_alias  mynewalias  "some very long command"\n';
    else
        local name="$1" value="$2";
        echo alias "$name"=\'$value\' >> ~/bash.bash_aliases;
        eval alias "$name"=\'$value\';
        alias "$name";
    fi
}