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I want to know if it's possible to get someones' IP address if I have their name, email and ID.
No, it's not. That person could access your application from anywhere, and if all you have are his name, email and user ID, that's not going to tell you anything about what machine he's coming from.
What do you mean by his id? An email address and a name are not sufficient to retrieve an IP.
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I just received an email from the R-Project, an email subscription service that sends out emails for R question, and they sent me my password, unencrypted, in plain text. Is this a security flaw, and should I immediately contact them and change my password? I've never had a service send me my password without even asking.
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The following info is from a UNIX host with a IP of 205.133.127.8/24 and a gateway of 205.133.127.1
(205.133.127.1) at 0:50:54:7b:e8:c0
(205.133.127.4) at 0:10:1f:52:10:0
(205.133.127.6) at 0:60:8:93:37:b5
(205.133.127.7) at 0:0:f4:c8:9f:6a
(205.133.127.8) at 0:60:8:93:38:c2
(205.133.127.9) at 0:60:8:93:38:db
(205.133.127.10)at 0:50:da:b:23:c9
...
(205.133.127.76) at 8:0:20:b:6d:b9
(205.133.127.84) at 0:c0:5:4:14:17
(205.133.127.85) at 0:c0:5:4:1e:19
...
(205.133.127.214)at (incomplete)
(205.133.127.234)at 0:40:33:ca:a1:5d
(205.133.127.238)at 0:60:97:79:2:8a
(205.133.127.255) at ff:ff:ff:ff:ff:ff
What does this mean?
For this line (205.133.127.4) at 0:10:1f:52:10:0, What is this part 0:10:1f:52:10:0. showing?
Describe the events that will happen if the host had packets going to 205.133.127.84, 205.133.127.83, or 205.133.181.3?
What is the difference from these?
205.133.127.84 is the only line that shows up on my list.Does this signify something?
That's a list of Mac addresses and matching IP addresses.
If the host wants to send to a IP address that's in that list, and if there is a route to it in the routing table then it would eventually use that address.
See man arp for full details
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I'm almost positive everyone on here knows the meaning of 127.0.0.1. But, why is that ALWAYS localhost?
Who picked that arbitrary IP? Why was that IP picked?
Why not something more simple such as 1.0.0.0? Is there some special meaning to 127.0.0.1?
RFC means "Request for Comments"
RFC 1700 can be found at http://www.ietf.org/rfc/rfc1700.txt
This may give you more insight into how the IP's are allocated for localhost and so on.
Actually, a better reference is the following:
https://www.rfc-editor.org/rfc/rfc820
Certain IP addresses are reserved and 127.0.0.1 is one of them.
Some of the founding fathers/mothers of the internet decided that this was a good idea and we have been happy enough since that time.
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I want to write a script which could login to the remote server and give the control back to the user on the terminal so that user could execute the commands after that. It is basically to avoid a lengthy procedure to login to the server.
Please suggest me how I can do this.
Thanks in advance
If the remote server is running on linux, then use ssh keys for doing this job, then you'll be able to login with just one command:
ssh <servername>
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I want to connect ubuntu virtual boxes with each other on a network. I want to use hadoop on it. So i need to put them in a network. It requires ssh to communicate. Can anyone help regarding it.
The easiest way is to change your adapter to "Bridged networking" instead of "Nat", the default. This way the guest system will get an ip on your local network and you can connect directly to it.