Solaris 10 security questions.

Is the security weak because a device file does not exist in /dev?

아래는 #find /dev -type f -exec ls -l {} \; These are the files found by the command.

-rw-r--r--  1 root   sys    98304 Mar 8 23:00 /dev/.devlink_db

-rw-------  1 root   root      0 Jul 26 2013 /dev/.zone_reg_door

-rw-------  1 root   root      0 Jul 26 2013 /dev/.devfsadm_synch_door

-rw-r--r--  1 root   root      0 Jun 26 2012 /dev/.devfsadm_daemon.lock

-rw-r--r--  1 root   root      4 Mar 8 23:00 /dev/.devfsadm_dev.lock

-rw-r--r--  1 root   root      0 Jun 26 2012 /dev/.devlink_db_lock

What should be done if these files are not secure? Wouldn't there be a problem with the system even if I erase the file?