sudo apt-add-repository | gpg: no valid OpenPGP data found

Help please, i am trying to install Cubic, but i have an error: When i run sudo apt-add-repository ppa:cubic-wizard/release I see this output:

 /////// ///\ \ /// \___\ Custom Ubuntu ISO Creator \ \ ///// \ \///// \_____\ Cubic (Custom Ubuntu ISO Creator) is a GUI wizard to create a customized Ubuntu Live ISO image. More info: More info: Press [ENTER] to continue or ctrl-c to cancel adding it gpg: keybox '/tmp/tmpo8ioi6s7/pubring.gpg' created gpg: /tmp/tmpo8ioi6s7/trustdb.gpg: trustdb created gpg: key 081525E2B4F1283B: public key "Launchpad PPA for PJ Singh" imported gpg: Total number processed: 1 gpg: imported: 1 Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)). gpg: no valid OpenPGP data found. 

I am using Kali Linux.

1 Answer

Commands used to install cubic:

sudo apt-add-repository ppa:cubic-wizard/release sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys B66730E51B4FB887805AE5ACDCBB7672F59F99D6 sudo apt update sudo apt install cubic 

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