Sir /Madam

What I did I explain

1. Install Virtual Box
2 Install Debian Xfce from ISO file latest version that I think 9 (stretch)
3 Internet was not accessible inside Debian Browser
4. Edited Repository and added non-free
5. Made internet accessible
6. Use apt-get update then Upgrade command
7. I saw updation was not properly done so again and again updated
8 used apt-get install sudo command

I got following error (sudo is necessary to install koha )

E: could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily
unavailable) E: unable to lock the administration directory (var/lib/dpkg),
its another process using it

Kindly Help me to resolve this problem.

While updating and other processes power went down frequently.

I think something problem is with sources.list file.

Pls help

Rajesh Bhatt

On Sun 11 Mar, 2018, 7:00 PM Johan Seyfferdt, <> wrote:

> Hi Takan
> You can either login as root by typing su and at the password prompt your
> root password.
> Or go to the user manager setting and add your username to be part of the
> sudo group
> On Mar 11, 2018 04:37, "takan bhatt" <> wrote:
>> Sir/Madam
>> I have installed Debian Xfce in Virtual Box also added non-free repository
>> in sources.list. Then updated and upgraded with apt-get. but updation is
>> not going smoothly. then after I am unable to install Sudo and this is
>> necessary step in koha installation. I think this is probably problem with
>> repository.
>> Kindly help me which repositories are required ?
>> Rajesh Bhatt
>> _______________________________________________
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