error on tlmgr

semih ozlem semihozlemsemihozlem at
Sun Jul 19 21:05:57 CEST 2020

Hi I am trying to run update of texlive, that has been downloaded from
debian repository.
When I run the update command as below, I get the response below. What
should I do

Thanks in advance for your help.
user at debian:/media/user/sd/latexfiles_sample$ tlmgr update --all
(running on Debian, switching to user mode!)
query_ctan_mirror: Programs not set up, trying wget
cannot contact, returning a backbone server!

/usr/bin/tlmgr: signature verification error of /tmp/dtiRH6vt47/nBHVmI8h_b
cryptographic signature verification of
failed. Output was
gpg: Signature made Sun 19 Jul 2020 02:58:16 AM +03
gpg:                using RSA key 4CE1877E19438C70
gpg: Note: trustdb not writable
gpg: BAD signature from "TeX Live Distribution <tex-live at>"

Please report to texlive at
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