I’ve had windows for years; I knew the OS inside out. Recently, I switched to Mac. But I wondered how to edit the hosts file for my VPN connections and my servers. After some research, I found out how to do it and thought I will document it on PeteNetLive! 🙂
Solution
Open a terminal session and type in the following command;
[box]Sudo nano /etc/hosts[/box]
Note: I’m using nano for this but you can use vi to edit the document (sudo vi /etc/hosts).
You’ll be prompted to enter your password.
Then you will get this screen;
Type in an entry for example (Note: This is not my IP or my company’s IP!);
To Save, Press Control and O and Enter.
To Exit, press Control and X.
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I was clearing out some old emails yesterday, and saw one my colleague Steve had sent me. It was info on how to fire up a quick web server on your mac. It wasn’t until I took a look at it, I realised how handy it was.
After some reading, I found that it was not only possible on a mac, but on other flavours of Linux as well, (as long as they support ‘python’ and have it loaded).
WHAT USE IS THAT? What if you want to send a large file to a colleague? Yes you could use USB drives or dropbox, but executing one command is a lot quicker. Or what if you are on a site where everything is locked down, and only a few ports are open but you need to get a file somewhere, do a quick nmap scan and you can download your files over a different port.
Solution
First open a terminal window, then navigate to the folder you want to ‘serve’. Then simply execute the following command;
[box]
python -m SimpleHTTPServer 8080
[/box]
Note: Where TCP port 8080 is the port you want to use. Then simply browse to https://{Your-IP-Address}:8080
BE AWARE: You shouldn’t see a problem if you use any port ABOVE 1024, however if you chose a lower port, you may see ‘Permission Denied’ errors.
To address that ‘sudo’ the command, (unless you are logged into Linux as root!)
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You have a Linux client machine, and you want to authenticate to, and log into a Windows domain. I don’t have too much history with Linux, but from what I’ve read this used to be a nightmare. Using Ubuntu (10.10) I did have a couple of hiccups, but I did get there in the end.
Note: The domain controller is a Windows 2008 R2 Server.
Solution
Notes
1. The commands needed to install the “likewise-open5” package, and join the domain, (assuming the FQDN of the domain is domaina.com and the user name you are using to join the domain is administrator).
2. Then to allow users to logon from the Ubuntu welcome screen,
[box]sudo nano /etc/samba/lwiauthd.conf[/box]
3. Add the following line (the file will probably be empty), to Save press CTRL+X, then Y, then {enter}.
[box]winbind use default domain = yes[/box]
4. Then reboot.
[box]sudo reboot[/box]
5. To allow sudo for the domain user(s),
[box]sudo nano /etc/sudoers[/box]
Locate the line that reads “#Members of the Admin group may gain root privileges and do the following:”. Below that, type the following (assuming the domain name is domaina and the user is a member of the domain admins group, domain^users also works).
[box]%domainadomain^admins ALL=(ALL) ALL[/box]/p>
Problem 1
Error: Lsass Error [code 0x00080047]
9502 (0x251E) DNS_ERROR_BAD_PACKET – A bad packet was received from a DNS server. Potentially the requested address does not exist.
This plagued me for a while, I tried everything I read online (like making sure that my time was correct – which it wasn’t (see below), making sure firewalls were off (they were), make sure your DNS has a reverse lookup zone (mine has), and finally make sure there are no existing DNS records for the IP address you are connecting with (mine did so I deleted them). None of these fixed the problem, to fix it is annoyingly simple.
FIX
Firstly make sure that the Ubuntu client is looking at your domain DNS server, for it’s DNS, the following command will tell you,
[box]cat /etc/resolv.conf[/box]
Then get the domain syntax right, in my case the domain name.
If you would like to add your domain user(s) to the welcome screen click here.
Update 04/01/12
Attention: PeteNetLive – Suggestion
Message: Hi,
Thanks very much for you YouTube and description of joining Ubuntu to a domain. There was however one step extra that I needed to do to enable to logon screen to show users other than the local use and the guest account. To do this I had to add the following line to /etc/lightdm/lightdm.conf
greeter-show-manual-login=true
I was joining Ubuntu 12.10 to the domain so maybe it is specific to 12.10 since you didn’t experience it but it would be good to add it to your article along with the other fixes to issues.
Thanks again.
From: Roland Elferink
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