Resolving my local hostname (the one returned by hostname) does not yield the right ip address. Why could that be and how do I fix it?
$ hostname -i
10.21.16.206
$ ping 10.21.16.206
PING 10.21.16.206 (10.21.16.206) 56(84) bytes of data.
From 10.21.16.159 icmp_seq=1 Destination Host Unreachable
$ ifconfig
(...)
inet 10.21.16.159 netmask 255.255.252.0 broadcast 10.21.19.255
(...)
10.21.16.206 != 10.21.16.159
$ host 10.21.16.159
Host 159.16.21.10.in-addr.arpa. not found: 3(NXDOMAIN)
$ host 10.21.16.206
206.16.21.10.in-addr.arpa domain name pointer lxka-czc1166cxw.united.domain.
$ resolveip 10.21.16.159
Host name of 10.21.16.159 is lxka-czc1166cxw
$ resolveip 10.21.16.206
Host name of 10.21.16.206 is lxka-czc1166cxw.united.domain
Help is very much appreciated!
Edit:
$ host $(hostname)
lxka-czc1166cxw.united.domain has address 10.21.16.206
hostname -i relies on DNS resolution to return the IP address of the given hostname. Either your /etc/hosts or dns resolver return that hostname to the incorrect IP address.
from man page of hostname:
option -i, --ip-address
Display the network address(es) of the host name. Note that this works only if the host name can be resolved. Avoid using this option;
use hostname --all-ip-addresses or
To use the hostname -I option instead of it.
Related
I would like to get the ip address of this data.alpaca.markets url. When I use the ping command on Macos, this is the ip address that it returns: 35.186.171.205. I navigated to the IP address only to find that this isn't the website I wanted. How can I get the IP address of the URL above?
./add_device.php 1.2.3.4 catalyst v1
fails with
Try to add 1.2.3.4:
Could not resolve 1.2.3.4.
Devices failed: 1.
but ping works
fping 1.2.3.4
1.2.3.4. is alive
but snmpwalk works like:
snmpwalk -v 1 -c catalyst 1.2.3.4
iso.3.6.1.2.1.1.1.0 = STRING: "Cisco IOS Software, Catalyst...
...
web interface add device also fails same way.
what am I missing?
The community edition can't resolve IP's (go figure), so you have to create an entry in /etc/hosts for your IP and assign somename.whatever to it and then use that hostname and it will work.
I have a file which maps IP address to hostnames. Its format is similar to hosts file and contains a list of IP address to hostname mapping.
eg.
10.200.99.1 master1
10.200.99.2 master2
10.200.99.3 master3
10.200.99.4 slave1
10.200.99.5 slave2
10.200.99.6 slave3
...
...
...
I would like to create network file (/etc/sysconfig/network) for all the IP address mentioned in the file.
The format of network file is where the hostname is mentioned based on hosts file.
NETWORKING=yes
HOSTNAME=master1
NOZEROCONF=yes
For every IP Address the network file is created in a directory named by IP Address i.e. network/{IPAddress}.
For example for master1 the path of file should be network/10.200.99.1 and for master2 the path should be network/10.200.99.2.
How can i do so?
Till now I have obtained IPAdress by following command echo $(<hosts) | awk '{print $1}' and Hostname by echo $(<hosts) | awk '{print $2}. But this only prints the contents of first line of the hosts file.
Reads ip and hostname from hosts and writes desired output to network/$ip.
while read ip hostname; do
printf '%s\n' "NETWORKING=yes" "HOSTNAME=$hostname" "NOZEROCONF NF=yes" > network/$ip
done < hosts
I would like to send trap and specify clientaddress
As I search there is two ways:
edit /etc/snmp/snmp.conf and set: clientaddr [IP_OF_DEVICE]
specify IP as parameter: --clientAddr="[IP_OF_DEVICE]"
When i try to issue command:
snmptrap -v 3 -l noAuthNoPriv -u SomeUser -n "" AGENT_IP .1.3.6.1.4.1.161.5.2 .1.3.6.1.4.1.161.1.2.3.4 5
It gives an error
getaddrinfo(AGENT_IP, NULL, ...): Address family for hostname not supported
When I not specify clientadress it works as expected but it use IP of the machine where I issed a command as a client IP
To get rid of this I have to:
Define virtual interface for ip of device which you want to simulate
Specify protocol of agent ( by default when I set clientaddr in /etc/snmp/snmp.conf it looks like it tried to use IPv6 for agent )
snmptrap -v 3 -l noAuthNoPriv -u SomeUser -n "" udp:AGENT_IP ...
while executing
"snmptrap -v 1 -c public localhost TRAP-TEST-MIB::demotraps localhost 4 0 '' IF-MIB::ifIndex i 1"
on my system,I am getting host ,ip & OID values as
host = localhost.localdomain :ip = UDP: [127.0.0.1]:49109->[127.0.0.1] :OID =DISMAN-EVENT-MIB::sysUpTimeInstance 0:3:12:38.28
But when traps are coming from outside its showing
host = :ip = UDP: [192.168.1.73]:52346->[192.168.1.23]:OID =DISMAN-EVENT-MIB::sysUpTimeInstance 7:1:05:54.27 .
Now its clearly shown above that host value didn't show up ...I want to know why & how it get to be resolve.
Thanks in advance
the one reason is if you are using VMware/virtual OS and you have not configured different IP than your host machine IP.
Simply keep ip & its corresponding host-name in /etc/hosts file..That's All
My /etc/hosts file is-
127.0.0.1 localhost.localdomain localhost
::1 localhost6.localdomain6 localhost6
192.168.1.150 ZYXEL
192.168.1.73 CISCO
192.168.1.135 DIGISOL