Aterm has an issue with creating a terminal. A quick ‘ls –al’ on a aterm with ‘mesg y’ shows: crw--w--w- 1 alsdk users 5, 3 Jul 13 17:27 /dev/ttyp3 with ‘mesg n’: crw-----w- 1 alsdk users 5, 3 Jul 13 17:28 /dev/ttyp3 1) World (nobody) is able to ‘echo’ or ‘cat’ towards the terminal echo “hello” >> /dev/ttyp3 cat mkdir >> /dev/ttyp3 2) The group seems to be incorrect, a normal terminal has default group tty A xterm with ‘mesg y’ shows : crw--w---- 1 ttielu tty 5, 5 Jul 13 17:27 ttyp5 and with ‘mesg n’ : crw------- 1 ttielu tty 5, 5 Jul 13 17:27 ttyp5 Advice: use xterm Bug found by TTIelu, reverse engineered by alsdk and TTIelu