[tex-live] gpg: verify signatures failed: Unknown system error

[Norbert Preining]

> I think the error in this file is due to my not running the command with sudo.

Yes indeed, which is also clearly stated in the tlmgr output:

> You don't have permission to change the installation in any way,
> specifically, the directory /usr/local/texlive/2018/tlpkg/ is not writable.
> Please run this program as administrator, or contact your local admin.
> tlmgr: An error has occurred. See above messages. Exiting.

Best

Norbert

--
PREINING Norbert                               http://www.preining.info
Accelia Inc.     +    JAIST     +    TeX Live     +    Debian Developer
GPG: 0x860CDC13   fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13