Ubuntu – lsusb is not working on Ubuntu

14.04lsusbssh

I have an Ubuntu server version (14.04 up to date LTS). I mostly use this machine over SSH.

Yesterday I typed in lsusb and the machine gave me the following error:

unable to initialize libusb: -99

I searched on the web, but did not get any answers on this problem.

Question: What does this error mean and how can I solve it?

Note: The machine is installed on an ESXI machine and the usb devices are passed through ESXI.

Best Answer

unable to initialize libusb could be because there is no USB controllers present on the Server. You can check it out by executing the following command:

lspci | grep USB

In your case, there would be no output, indicating the absence of USB controllers. If so, then add one. I have not worked much on VMs, so I can't tell anything about that, but upon googling, I found several pages that might help you, including this .

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Ubuntu – Run GParted over SSH

The problem is that when you use sudo, it creates a new environment with no X settings.

There are two options: first, you can use sudo -E gparted to try preserving the environment, try it, if this works it's probably the safest option.

If not, you'd need to configure your server's root account to allow logging in through ssh, so that you can ssh root@server, which should set the appropriate forwarding and environment.

First, on the server, in /etc/ssh/sshd_config, ensure it has:

X11Forwarding yes
PermitRootLogin without-password

Next, add the ssh public key from your client to the root account on the server. If you can already ssh to the server without password with your normal user, then use sudo -i to start an interactive root session. Then:

ssh localhost. This is just so that an initial .ssh directory is created.
Copy the authorized_keys file from the normal user: cp /home/normaluser/.ssh/authorized_keys ~/.ssh

Now from the remote system try ssh -v root@server. You should be able to log in with no password. Check that the output shows X forwarding has been enabled. Then you should be able to run gparted remotely.

Also, it goes without saying, but mucking around with a remote system's partitions is risky; ensure you have a backup of important data in case a disaster happens :)

Ubuntu – Package ‘ttf-mscorefonts-installer’ has no installation candidate

Here are two methods you can use to install the software.

Command line install

echo "deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty multiverse
deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
deb http://us-west-2.ec2.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse" | sudo tee /etc/apt/sources.list.d/multiverse.list 
sudo apt-get update
sudo apt-get install ttf-mscorefonts-installer

Easy install

Open ubuntu software center, click on Edit and select Software Sources from the dropdown menu.

Place a tick in the box for Software restricted by copyright or legal issues (multiverse).

You may be asked for a password.

When you are done, run the following commands:

sudo apt-get update
sudo apt-get install ttf-mscorefonts-installer

Best Answer

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