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What are the device numbers reported by lsof?

I read the man page, Identify devices from lsof, and this.

Still I do not know what is its meaning. In particular, for this case, what can I infer from the numbers?

$ lsof -ai tcp -c vino-server
lsof: WARNING: can't stat() tracefs file system /sys/kernel/debug/tracing
      Output information may be incomplete.
COMMAND    PID     USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
vino-serv 4011    user1   12u  IPv4   27353      0t0  TCP *:5900 (LISTEN)
vino-serv 4011    user1   11u  IPv6   27352      0t0  TCP *:5900 (LISTEN)
vino-serv 4011    user1   14u  IPv4 7506511      0t0  TCP XXXXXXXXXX (ESTABLISHED)
sancho.s ReinstateMonicaCellio
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1 Answers1

2

In this case, each of these is the inode number of the corresponding socket. You have listed open TCP sockets, and sockets are identified by their inode number. You can see the same numbers if you do ls -l /proc/<pid>/fd or ls -Lli /proc/<pid>/fd (in this case, <pid> is 4011). You can use the inode number when looking for information about that socket (e.g., in /proc/net/tcp or the ss command).

muru
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