Can I use two different DNS servers in the one command in the form of primary and secondary.
Take this for example:
dig @<primaryAddress> @<secondaryAddress> MX domain.tld
So if primary address is down, it will use the secondary address as a backup. It seems to work when testing, but thought... (1 Reply)
Hi All,
Can please let me know what is the difference between the single line mode and multi line mode in regular expresions?
Thanks,
Chidhambaram B (3 Replies)
Hi,
I have these entries in the /etc/esolv.conf:
------------
domain xxxxxx
search yyyyyy
nameserver 127.0.0.1
nameserver aaaaaaaaaaaaaaaa
nameserver bbbbbbbbbbbbbbbb
-------------
When I use 'dig' or 'nslookup' command, like 'dig yahoo.com' it uses the localhost as the server.
I... (2 Replies)
I am relatively new to this forum and Unix scripting.
ksh script:
part 1 :will call a PL\SQL program will create 3 CSV file at the unix directory.
part 2 : will sftp the files to the EFT server.
Once the EFT server receives these file , it will transfer them to a shared windows folders.
... (3 Replies)
Dear All,
I want to get all the IPs of the A RECORDS for mail.google.com.
The aim is to deny access to these IPs.
I learnt that mail.google.com has several IPs.
I did the following steps:
1. whois google.com
2. I got the following as its DOMAIN SERVERS:
3.# dig @ns1.google.com a... (1 Reply)
Hey everyone,
Okay, so I've been having some fun with the dig command, and wanted to dig my old school. Two questions came up from this. So I:
dig @8.8.8.8 +recurse njcu.edu ANY
and the result is about 8 records, including the SOA record. One of them is this weird TXT record, and the other is... (1 Reply)
Hi,
I am testing some code to match a grep to see if one of the dns server exists but it does not seem to match:
ERROR:
=======
CRITICAL: google.com DNS : ns3.google.com NOT found
CODE:
=====
if ; then
echo "OK: google.com DNS : ns3.google.com exists"
else
echo... (5 Replies)
Hi there, I'm currently working on an exercise to connect to a Windows iscsi target via a Red Hat initiator machine. I'm using Windows Server 2012 and Red Hat Enterprise Linux v7.1
I have created the target on the Windows Server box and the two devices can communicate with each other. Verified... (3 Replies)
Discussion started by: Tech87
3 Replies
LEARN ABOUT NETBSD
trpt
TRPT(8) BSD System Manager's Manual TRPT(8)NAME
trpt -- transliterate protocol trace
SYNOPSIS
trpt [-a] [-f] [-j] [-p hex-address] [-s] [-t] [-N system] [-M core]
DESCRIPTION
trpt interrogates the buffer of TCP trace records created when a socket is marked for ``debugging'' (see setsockopt(2)), and prints a read-
able description of these records. When no options are supplied, trpt prints all the trace records found in the system grouped according to
TCP connection protocol control block (PCB). The following options may be used to alter this behavior.
-a In addition to the normal output, print the values of the source and destination addresses for each packet recorded.
-f Follow the trace as it occurs, waiting a short time for additional records each time the end of the log is reached.
-j Just give a list of the protocol control block addresses for which there are trace records.
-p Show only trace records associated with the protocol control block at the given address hex-address.
-s In addition to the normal output, print a detailed description of the packet sequencing information.
-t in addition to the normal output, print the values for all timers at each point in the trace.
-M core
Extract values associated with the name list from core.
-N system
Extract the name list from system.
The recommended use of trpt is as follows. Isolate the problem and enable debugging on the socket(s) involved in the connection. Find the
address of the protocol control blocks associated with the sockets using the -A option to netstat(1). Then run trpt with the -p option, sup-
plying the associated protocol control block addresses. The -f option can be used to follow the trace log once the trace is located. If
there are many sockets using the debugging option, the -j option may be useful in checking to see if any trace records are present for the
socket in question.
SYSCTLS
The following sysctls are used by trpt. The TCP_DEBUG kernel option must be enabled.
net.inet.tcp.debug Structure containing TCP sockets information used by trpt.
net.inet.tcp.debx Number of TCP debug messages.
DIAGNOSTICS
no namelist
When the image doesn't contain the proper symbols to find the trace buffer; others which should be self explanatory.
SEE ALSO netstat(1), setsockopt(2)HISTORY
The trpt command appeared in 4.2BSD.
BUGS
Should also print the data for each input or output, but this is not saved in the trace record.
The output format is inscrutable and should be described here.
BSD August 30, 2007 BSD