[root@localhost /root]# /etc/rc.d/init.d/canna restart
Restart Canna server: Cannot connect with cannaserver "unix".


ERROR:
Another 'cannaserver' is detected.
If 'cannaserver' is not running,
"/tmp/.iroha_unix/IROHA" may remain accidentally.
So, after making sure that 'cannaserver' is not running.
Please execute following command.

rm /tmp/.iroha_unix/IROHA