[Fixed]-Linux, piping together apt-get update and apt-get upgrade

In this case you just have to remove the lock:

sudo rm /var/lib/dpkg/lock

and then try to execute the command

Let me know if its helps if not then follow the following:

sudo su
sudo rm /var/lib/dpkg/lock
apt-get update

and then execute the command
update and upgrade command on single line and if its works then go for api

It means another process is already running an apt-get command.
Close your other terminal windows, and perhaps any GUI’s you have open that use apt-get.