Objective

The following Spotify setup procedure outlines installation steps as provided by spotify.com. Nonetheless, may you encounter some difficulties along the way of the Spotify installation on Debian Stretch, read the appendix below to resolve them.

Requirements

Privileged access to your Debian Stretch system is required.

Difficulty

EASY

Conventions

  • # - requires given linux commands to be executed with root privileges either directly as a root user or by use of sudo command
  • $ - requires given linux commands to be executed as a regular non-privileged user

Instructions

Include Spotify's repository

First, we need to include Spotify's repository signing key. Execute the below command and import non-expired key. Most likely your numeric selection will be 1 as shown below:
# gpg --keyserver hkp://keyserver.ubuntu.com --search-key 'Spotify Public Repository Signing Key'
gpg: data source: http://91.189.89.49:11371
(1)     Spotify Public Repository Signing Key 
          4096 bit RSA key EFDC8610341D9410, created: 2017-07-25, expires: 2018-07-25
(2)     Spotify Public Repository Signing Key 
          4096 bit RSA key 13B00F1FD2C19886, created: 2015-05-28, expires: 2017-11-22 (expired)
(3)     Spotify Public Repository Signing Key 
          2048 bit RSA key 082CCEDF94558F59, created: 2012-06-25, expires: 2015-06-25 (expired)
(4)     Spotify Public Repository Signing Key 
          1024 bit DSA key 4F9946354E9CFF4E, created: 2010-06-23, expires: 2012-06-22 (expired)
Keys 1-4 of 4 for "Spotify Public Repository Signing Key".  Enter number(s), N)ext, or Q)uit > 1
gpg: /root/.gnupg/trustdb.gpg: trustdb created
gpg: key EFDC8610341D9410: public key "Spotify Public Repository Signing Key " imported
gpg: Total number processed: 1
gpg:               imported: 1
To confirm, hence list all imported keys run:
# gpg --list-keys
/root/.gnupg/pubring.kbx
------------------------
pub   rsa4096 2017-07-25 [SC] [expires: 2018-07-25]
      0DF731E45CE24F27EEEB1450EFDC8610341D9410
uid           [ unknown] Spotify Public Repository Signing Key 
Add Spotify's repository to local sources and run apt-get update:
# echo deb http://repository.spotify.com stable non-free > /etc/apt/sources.list.d/spotify.list
# apt-get update

Install Spotify on Debian Stretch

Finally, we are ready to install Spotify client on Debian Stretch using apt-get comamnd:
#  apt-get install spotify-client
All done. You should now be able to run Spotify from your start menu or from command line:
$ spotify
launch spotify on debian stretch linux
run spotify on debian stretch linux

Appendix

gpg: keyserver receive failed: No dirmngr

You are missing dirmngr binary. Install dirmngr package.
# apt install dirmngr
ERROR:
gpg: failed to start the dirmngr '/usr/bin/dirmngr': No such file or directory
gpg: connecting dirmngr at '/tmp/tmp.t1Mi4lXT6P/S.dirmngr' failed: No such file or directory
gpg: keyserver receive failed: No dirmngr

spotify-client : Depends: libssl1.0.0 but it is not installable

Debian Stretch contains higher version of libssl. Download and install libssl1.0.0 from Debian Jessie repository:
$ wget http://security.debian.org/debian-security/pool/updates/main/o/openssl/libssl1.0.0_1.0.1t-1+deb8u7_amd64.deb
# dpkg -i libssl1.0.0_1.0.1t-1+deb8u7_amd64.deb
ERROR:
The following packages have unmet dependencies:
 spotify-client : Depends: libssl1.0.0 but it is not installable