lucio@lucio-HP-550:~$ dmesg -l | grep box | pastebinit
dmesg: l'opzione richiede un argomento -- "l"

Usage:
 dmesg [options]

Options:
 -C, --clear                 clear the kernel ring buffer
 -c, --read-clear            read and clear all messages
 -D, --console-off           disable printing messages to console
 -d, --show-delta            show time delta between printed messages
 -E, --console-on            enable printing messages to console
 -f, --facility <list>       restrict output to defined facilities
 -h, --help                  display this help and exit
 -k, --kernel                display kernel messages
 -l, --level <list>          restrict output to defined levels
 -n, --console-level <level> set level of messages printed to console
 -r, --raw                   print the raw message buffer
 -s, --buffer-size <size>    buffer size to query the kernel ring buffer
 -T, --ctime                 show human readable timestamp (could be 
                             inaccurate if you have used SUSPEND/RESUME)
 -t, --notime                don't print messages timestamp
 -u, --userspace             display userspace messages
 -V, --version               output version information and exit
 -x, --decode                decode facility and level to readable string

Supported log facilities:
    kern - kernel messages
    user - random user-level messages
    mail - mail system
  daemon - system daemons
    auth - security/authorization messages
  syslog - messages generated internally by syslogd
     lpr - line printer subsystem
    news - network news subsystem

Supported log levels (priorities):
   emerg - system is unusable
   alert - action must be taken immediately
    crit - critical conditions
     err - error conditions
    warn - warning conditions
  notice - normal but significant condition
    info - informational
   debug - debug-level messages

Si sta tentando di inviare un documento vuoto, in chiusura.
lucio@lucio-HP-550:~$