lavamaster@lavamaster:~$ wget --no-check-certificate https://apt.lavasoftware.org/lavasoftware.key.asc
--2020-11-27 17:45:41--  https://apt.lavasoftware.org/lavasoftware.key.asc
Resolving apt.lavasoftware.org (apt.lavasoftware.org)... 51.148.40.41
Connecting to apt.lavasoftware.org (apt.lavasoftware.org)|51.148.40.41|:443... connected.
WARNING: The certificate of ‘apt.lavasoftware.org’ is not trusted.
WARNING: The certificate of ‘apt.lavasoftware.org’ doesn't have a known issuer.
HTTP request sent, awaiting response... 200 OK
Length: 5412 (5.3K) [text/plain]
Saving to: ‘lavasoftware.key.asc’

lavasoftware.key.asc                               100%[================================================================================================================>]   5.29K  --.-KB/s    in 0s      

2020-11-27 17:45:42 (34.7 MB/s) - ‘lavasoftware.key.asc’ saved [5412/5412]

lavamaster@lavamaster:~$ ls -ltr
total 48
-rw-r--r-- 1 lavamaster lavamaster 5412 Oct 11  2018 lavasoftware.key.asc
drwxr-xr-x 2 lavamaster lavamaster 4096 Nov 12 10:54 Videos
drwxr-xr-x 2 lavamaster lavamaster 4096 Nov 12 10:54 Templates
drwxr-xr-x 2 lavamaster lavamaster 4096 Nov 12 10:54 Public
drwxr-xr-x 2 lavamaster lavamaster 4096 Nov 12 10:54 Music
drwxr-xr-x 2 lavamaster lavamaster 4096 Nov 12 10:54 Downloads
drwxr-xr-x 2 lavamaster lavamaster 4096 Nov 12 10:54 Documents
drwxr-xr-x 2 lavamaster lavamaster 4096 Nov 12 18:34 Pictures
drwxr-xr-t 2 lavamaster lavamaster 4096 Nov 13 17:22 thinclient_drives
drwxr-xr-x 2 lavamaster lavamaster 4096 Nov 14 20:06 Desktop
drwxr-xr-x 3 lavamaster lavamaster 4096 Nov 27 13:09 tmp
lavamaster@lavamaster:~$ sudo apt-key add lavasoftware.key.asc
OK
lavamaster@lavamaster:~$
lavamaster@lavamaster:~$ sudo apt update
Hit:1 http://deb.debian.org/debian buster InRelease
Hit:2 http://deb.debian.org/debian buster-updates InRelease
Hit:3 http://security.debian.org/debian-security buster/updates InRelease
Reading package lists... Done                               
Building dependency tree       
Reading state information... Done
All packages are up to date.
lavamaster@lavamaster:~$ apt install lava
E: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?
lavamaster@lavamaster:~$


lavamaster@lavamaster:~$ apt-cache policy lava-dispatcher
lava-dispatcher:
  Installed: 2019.01-5
  Candidate: 2019.01-5
  Version table:
 *** 2019.01-5 500
        500 http://deb.debian.org/debian buster/main amd64 Packages
        100 /var/lib/dpkg/status
lavamaster@lavamaster:~$