Warning: This program is an suid-root program or is being run by the root user.The full text of the error or warning message cannot be safely formattedin this environment. You may get a more descriptive message by running theprogram as a non-root user or by removing the suid bit on the executable./usr/X11R6/bin/xterm Xt error: Can't open display: %s ubuntu 에서 X11 이 안뜨는건 # vi /etc/hosts127.0.0.1 ..