Error when trying to run Tomcat7: cannot open terminal: unknow

I’m trying to run tomcat 7 on ubuntu 16.04 but when I run “sudo service tomcat7 start” I get

Job for tomcat7.service failed because the control process exited with error code. See “systemctl status tomcat7.service” and “journalctl -xe” for details.

and if I run “systemctl status tomcat7.service” I get

jhon@mitutorweb:/etc/init.d$ systemctl status tomcat7.service ● tomcat7.service - LSB: Start Tomcat. Loaded: loaded (/etc/init.d/tomcat7; bad; vendor preset: enabled) Active: failed (Result: exit-code) since Wed 2017-04-26 04:38:57 UTC; 4s ago Docs: man:systemd-sysv-generator(8) Process: 2012 ExecStart=/etc/init.d/tomcat7 start (code=exited, status=1/FAILURE)

Apr 26 04:38:57 mitutorweb systemd[1]: Starting LSB: Start Tomcat… Apr 26 04:38:57 mitutorweb sudo[2019]: root : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/bin/nano /etc/ Apr 26 04:38:57 mitutorweb sudo[2019]: pam_unix(sudo:session): session opened for user root by (uid=0) Apr 26 04:38:57 mitutorweb tomcat7[2012]: Error opening terminal: unknown. Apr 26 04:38:57 mitutorweb sudo[2019]: pam_unix(sudo:session): session closed for user root Apr 26 04:38:57 mitutorweb systemd[1]: tomcat7.service: Control process exited, code=exited status=1 Apr 26 04:38:57 mitutorweb systemd[1]: Failed to start LSB: Start Tomcat… Apr 26 04:38:57 mitutorweb systemd[1]: tomcat7.service: Unit entered failed state. Apr 26 04:38:57 mitutorweb systemd[1]: tomcat7.service: Failed with result ‘exit-code’. lines 1-15/15 (END)

I know it is related to the nano command but I don’t know how solve it. I hope you can help me. Thanks in advance.