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Full Discussion: (ASK) Question about linux network...
Operating Systems Linux (ASK) Question about linux network... Post 302562834 by hartz on Saturday 8th of October 2011 01:21:45 PM
Old 10-08-2011
Quote:
Originally Posted by busoh.sensen
last -i ==> this just local pc
Are you sure that someone (you?) did log in into the Linux computer from another computer?

"last -i" shows ALL logins, from anywhere.

"last -i | grep 192" will filter the output from last -i and show only the lines which has got 192. The "| grep 192" is a second, independent command which filters the output from the first command.

Quote:
Originally Posted by busoh.sensen
but, the good news my laptop is detect from another windows pc. any idea/ways to knows another IP in my network (LAN)?
I am not sure that I understand the question. I did explain how to perform broadcast ping. What IP are you looking for?

To find out your own IP address on the Linux computer, run ifconfig.

On the Windows computer, install "putty". Putty can login to a remote Linux or Unix computer ... but only if the Linux computer is configured to allow logins from remotely.

In the good old days Linux computers used to allow this by default. Now many Linux distributions do not include the software to allow remote login by default. For example Ubuntu Server version includes an SSH daemon, but Ubuntu desktop version does not.

In Ubuntu or Debian or any derivative Linux or any linux that uses APT for software package management, run this command to install the SSH daemon:

sudo apt-get install sshd

Note: Many Unix services are called daemons.

It will find the software, download it, install it, configure it and activate it automatically.

To check if your computer allows remote login via SSH, run this command:

netstat -a | grep -i ssh

If there is something that states LISTENING then you can connect with an SSH client such as "Putty".

P.S You are not disturbing. Feel free to ask as many questions, but you should also try to google search to find these answers. I do know however that the "vocabulary" is new and in the beginning it is difficult to know what to google and how to sift through the plethora of results that you get. I still struggle with it and I've only been using Unix since 1989 and Linux since 1991.
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LEARN ABOUT LINUX

ssh-copy-id

SSH-COPY-ID(1)						      General Commands Manual						    SSH-COPY-ID(1)

NAME

       ssh-copy-id - install your public key in a remote machine's authorized_keys

SYNOPSIS

       ssh-copy-id [-i [identity_file]] [user@]machine

DESCRIPTION

       ssh-copy-id  is	a script that uses ssh to log into a remote machine and append the indicated identity file to that machine's ~/.ssh/autho-
       rized_keys file.

       If the -i option is given then the identity file (defaults to ~/.ssh/id_rsa.pub) is used, regardless of whether there are any keys in  your
       ssh-agent.  Otherwise, if this:

	     ssh-add -L

       provides any output, it uses that in preference to the identity file.

       If  the -i option is used, or the ssh-add produced no output, then it uses the contents of the identity file.  Once it has one or more fin-
       gerprints (by whatever means) it uses ssh to append them to ~/.ssh/authorized_keys on the remote machine (creating the file, and directory,
       if necessary.)

NOTES

       This program does not modify the permissions of any pre-existing files or directories. Therefore, if the remote sshd has StrictModes set in
       its configuration, then the user's home, ~/.ssh folder, and ~/.ssh/authorized_keys file may need to have group writability  disabled  manu-
       ally, e.g. via

	     chmod go-w ~ ~/.ssh ~/.ssh/authorized_keys

       on the remote machine.

SEE ALSO

       ssh(1), ssh-agent(1), sshd(8)

OpenSSH 							 14 November 1999						    SSH-COPY-ID(1)
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