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Operating Systems Linux Urgent - serial port
# 1  
Old 08-04-2008
Urgent - serial port
Hi All,
I am a begineer in Linux, I have 4 ports and 3 are operational port 1,port 2 and port 4 (when I plug in serial device I can see it working) but port 3 seems it is not working.
I am sure the hardware is fine.

when I give command

dmesg | grep tty

I get,
serial 8250:ttyS0 at I/O 0x3f8 (irq=4)is a 16550A
serial 8250:ttyS1 at I/O 0x2f8 (irq=3)is a 16550A
serial 8250:ttyS2 at I/O 0x3e8 (irq=4)is a 16550A
serial 8250:ttyS3 at I/O 0x2e8 (irq=3)is a 16550A
0:05:ttyS0 at I/O 0x3f8 (irq=4) is a 16550A
0:06:ttyS1 at I/O 0x2f8 (irq=3) is a 16550A
0:09:ttyS3 at I/O 0x2e8 (irq=11) is a 16550A

I also tried setserial -g /dev/ttyS2 but getting the same result

My Qustion is:
1) what is the difference b/w first 4 lines and last three lines and Y is port 3(ttyS2) not getting displayed in b/w last three lines.
2) Is there something I have to do to enable port 3.
2)Please help me out to get the port 3 into working condition


Thanks in advance
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LEARN ABOUT MOJAVE

nsd-xfer

nsd-xfer(8)                                                         nsd 3.2.12                                                         nsd-xfer(8)

NAME

       nsd-xfer - AXFR client to transfer zones from a name server

SYNOPSIS

       nsd-xfer [-4] [-6] [-a address[@port]] [-p port] [-s serial] [-T tsiginfo] [-v] -z zone -f file servers

DESCRIPTION

       Nsd-xfer is program to transfer zones from a name server using AXFR.  NSD is a complete implementation of an authoritative DNS nameserver.

OPTIONS

       -4     Only send to IPv4 addresses.

       -6     Only send to IPv6 addresses.

       -a address[@port]
              Specify the source address (and port) to send from.

       -f file
              The file to store the zone in.

       -p port
              Specify the port to send to.

       -s serial
              Specify the serial of the current zone. The zone is only transferred if the master server has a zone with a greater serial number.

       -T tsiginfo
              Use  TSIG  to verify the zone transfer. The tsiginfo file must contain the TSIG key information. The file is removed upon successful
              reading of the key. The format of the tsiginfo file is described in the doc/README file (section 3.3).

       -v     Be more verbose.

       -z zone
              Specify the zone to receive.

       servers
              List of nameservers to try.

EXAMPLES

       To run this program the standard way type:

       # nsd-xfer -z foobar.cz -f foobar.cz.zone 1.2.3.4

SEE ALSO

       nsd(8), nsdc(8), nsd.conf(5), nsd-checkconf(8), nsd-notify(8), nsd-patch(8), zonec(8)

AUTHORS

       NSD was written by NLnet Labs and RIPE NCC joint team. Please see CREDITS file in the distribution for further details.

NLnet Labs                                                         jul 19, 2012                                                        nsd-xfer(8)