Seems I'm doing something wrong?
I added all 4 lines one by one as follows:
akhil@akhil-HP-ENVY-Laptop-13-ah0xxx:~/Desktop$ curl -sS https://download.spotify.com/debian/pubkey_0D811D58.gpg
-----BEGIN PGP PUBLIC KEY BLOCK-----mQINBF9XbJMBEADQ/wu6dd7akoE1PrL6WpARdhoHjt2OU5Uj4H2vy2YWuEB8aaqX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=8BS2
-----END PGP PUBLIC KEY BLOCK-----
akhil@akhil-HP-ENVY-Laptop-13-ah0xxx:~/Desktop$ sudo apt-key add -echo "deb http://repository.spotify.com stable non-free"
[sudo] password for akhil:
gpg (GnuPG) 2.2.19
libgcrypt 1.8.5
Copyright (C) 2019 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.Home: /tmp/apt-key-gpghome.fACaxVqnOl
Supported algorithms:
Pubkey: RSA, ELG, DSA, ECDH, ECDSA, EDDSA
Cipher: IDEA, 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH,
CAMELLIA128, CAMELLIA192, CAMELLIA256
Hash: SHA1, RIPEMD160, SHA256, SHA384, SHA512, SHA224
Compression: Uncompressed, ZIP, ZLIB, BZIP2Syntax: gpg [options] [files]
Sign, check, encrypt or decrypt
Default operation depends on the input dataCommands:
-s, --sign make a signature
--clear-sign make a clear text signature
-b, --detach-sign make a detached signature
-e, --encrypt encrypt data
-c, --symmetric encryption only with symmetric cipher
-d, --decrypt decrypt data (default)
--verify verify a signature
-k, --list-keys list keys
--list-signatures list keys and signatures
--check-signatures list and check key signatures
--fingerprint list keys and fingerprints
-K, --list-secret-keys list secret keys
--generate-key generate a new key pair
--quick-generate-key quickly generate a new key pair
--quick-add-uid quickly add a new user-id
--quick-revoke-uid quickly revoke a user-id
--quick-set-expire quickly set a new expiration date
--full-generate-key full featured key pair generation
--generate-revocation generate a revocation certificate
--delete-keys remove keys from the public keyring
--delete-secret-keys remove keys from the secret keyring
--quick-sign-key quickly sign a key
--quick-lsign-key quickly sign a key locally
--sign-key sign a key
--lsign-key sign a key locally
--edit-key sign or edit a key
--change-passphrase change a passphrase
--export export keys
--send-keys export keys to a keyserver
--receive-keys import keys from a keyserver
--search-keys search for keys on a keyserver
--refresh-keys update all keys from a keyserver
--import import/merge keys
--card-status print the card status
--edit-card change data on a card
--change-pin change a card's PIN
--update-trustdb update the trust database
--print-md print message digests
--server run in server mode
--tofu-policy VALUE set the TOFU policy for a keyOptions:
-a, --armor create ascii armored output
-r, --recipient USER-ID encrypt for USER-ID
-u, --local-user USER-ID use USER-ID to sign or decrypt
-z N set compress level to N (0 disables)
--textmode use canonical text mode
-o, --output FILE write output to FILE
-v, --verbose verbose
-n, --dry-run do not make any changes
-i, --interactive prompt before overwriting
--openpgp use strict OpenPGP behavior(See the man page for a complete listing of all commands and options)
Examples:
-se -r Bob [file] sign and encrypt for user Bob
--clear-sign [file] make a clear text signature
--detach-sign [file] make a detached signature
--list-keys [names] show keys
--fingerprint [names] show fingerprintsPlease report bugs to https://bugs.gnupg.org.
OK
akhil@akhil-HP-ENVY-Laptop-13-ah0xxx:~/Desktop$ sudo tee /etc/apt/sources.list.d/spotify.list
