Dear Developers,

I am trying to build the osmo-euse-demo on the Osmocom VM, executing the following commands:

#Install required development libraries:

sudo apt-get install libosmo-gsup-client-dev

#Get the source code and a missing header file

wget https://raw.githubusercontent.com/osmocom/osmo-hlr/master/src/osmo-euse-demo.c

wget https://raw.githubusercontent.com/osmocom/osmo-hlr/master/include/osmocom/hlr/logging.h

mkdir -p osmocom/hlr/

mv logging.h osmocom/hlr/

#Compile source

gcc -I. -o osmo-euse-demo osmo-euse-demo.c -losmocore -losmo-gsup-client -losmogsm -ltalloc

#Run

./osmo-euse-demo

But i am now facing this error :

E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable)

E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), is another process using it?

Can you please tell me what is the reasin behind this error !? And how can i solve it ?

Many thanks for your consideraion,

Reza