As the doctor gone rogue

February 11, 2017

Bitvise X11 forwarding problem

Filed under: bash, SysAdmin, ubuntu — Tags: , , — hypotheses @ 12:00 am

You may have a problem trying to forward X11 from your Linux server through a terminal in Windows. I use Bitvise as the ssh client as it also provides the interface for sftp to download/upload the files. Not that using command line scp or sftp is not efficient, but in Windows you may have to install those tools separately.

Since I was trying to avoid installing Cygwin initially, Cygwin terminal wasn’t what I initially consider. Therefore, I went ahead and install Bitvise ssh client (instead of putty), which actually turns out to be quite good. The only problem (at least now) is when trying to forward GUI from the server with X11 forwarding, it failed miserably.

  • I’ve tried setting up bitvise in the X11 forward.
  • Installed X11-server from Cygwin (finally T_T).
  • But X11 forwarding still did not work. I got the error message below.

Failed to open channel for X11 forwarding from [::1]:47396 to Error connecting to X11 server: FlowSocketConnector: Failed to connect to target address. Windows error 10061: No connection could be made because the target machine actively refused it.

I kind of have an idea that this is something to do with Windows Firewall, which does not allow a specific port to listen to an incoming connection. But I haven’t quite figured out what to do. It is actually described on the bitvise page, but I guess I haven’t quite read the whole thing.

In short, after install cygwin X11 server, make sure to run the command below to fix the firewall permission. 

C:\cygwin64\bin\XWin -listen tcp -multiwindow


February 9, 2017

Get a new IP address for a running VirtualBox Ubuntu Machine

Filed under: SysAdmin, ubuntu, Virtual Machine — Tags: , , , — hypotheses @ 9:09 am


You have started up a virtual machine in VirtualBox. In this case, I ran Ubuntu 16.10. You then realized that the IP address of your VM is not accessible from your local network. Although you can connect from the Host to your Guest VM (Ubuntu).

Therefore, you would like to change the type of network from “NAT” to “Bridge”. You did this through the GUI menu (Machine > Setting > Network > Adapter 1 –> Change to “Bridged Adapter”

OK, now what. You IP addresses is still the same.

You can check your current IP and network device with

ubuntu:~$ ifconfig


February 6, 2017

Backing up FreeNAS to Amazon S3

Filed under: bash — hypotheses @ 7:59 am

Going through the AWS tutorial about creating File GateWay on my own is not exactly a walk in the park. Although I managed to install awscli and configured the basic requirement, there’s a missing gap that I haven’t quite figured out. This saves me lots of time trying to figure out how I can back up data already live on ZFS FreeNas to AmazonS3.

aws s3 sync /mnt/data/ s3://mybucket

What’s left to figure out next would be how to get all the files out when I need it, and how much it would cost, how to save those cost, etc. For the later part, I guess having AWS free credits does help a lot.

Take a look at the full guide following the link below.

ZFS is excellent at storing all your data safely but “there are still lots of potential ways for your data to die, and you still need to back up your pool. Period. PERIOD!” The process …

Source: Backing up FreeNAS to Amazon S3

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