Re: Trouble upgrading Debian (reply to David Wright)

[Richard Hector <richard@walnut.gen.nz>]

On 6/09/21 1:20 pm, Dedeco Balaco wrote:
> 3. Tried to do 'apt update' as root, but it does not work. GPG signature
> error.
>
> > 21:18:54 [ 0] root@compo: /etc/apt # apt-mark hold firefox-esr
> > firefox-esr-l10n-pt-br thunderbird thunderbird-l10n-pt-br firefox-esr
> > set on hold. firefox-esr-l10n-pt-br set on hold. thunderbird set on
> > hold. thunderbird-l10n-pt-br set on hold. 21:46:26 [ 0] root@debian:
> > /etc/apt # apt update Get:1http://security.debian.org  buster/updates
> > InRelease [65.4 kB] Err:1http://security.debian.org  buster/updates
> > InRelease The following signatures couldn't be verified because the
> > public key is not available: NO_PUBKEY 112695A0E562B32A NO_PUBKEY
> > 54404762BBB6E853 Get:2http://deb.debian.org/debian  buster InRelease
> > [122 kB] Get:3http://deb.debian.org/debian  buster-updates InRelease
> > [51.9 kB] Err:3http://deb.debian.org/debian  buster-updates InRelease
> > The following signatures couldn't be verified because the public key
> > is not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY
> > 0E98404D386FA1D9 Get:4http://deb.debian.org/debian  buster/main
> > Sources [7,836 kB] Get:5http://deb.debian.org/debian  buster/main
> > amd64 Packages [7,907 kB] Get:6http://deb.debian.org/debian
> > buster/main i386 Packages [7,863 kB] Get:7
> > http://deb.debian.org/debian  buster/main Translation-pt_BR [683 kB]
> > Get:8http://deb.debian.org/debian  buster/main Translation-en [5,968
> > kB] Get:9http://deb.debian.org/debian  buster/main Translation-pt [309
> > kB] Get:10http://deb.debian.org/debian  buster/main amd64 Contents
> > (deb) [37.3 MB] Get:11http://deb.debian.org/debian  buster/main i386
> > Contents (deb) [37.3 MB] Reading package lists... Done W: GPG error:
> > http://security.debian.org  buster/updates InRelease: The following
> > signatures couldn't be verified because the public key is not
> > available: NO_PUBKEY 112695A0E562B32A NO_PUBKEY 54404762BBB6E853 E:
> > The repository 'http://security.debian.org  buster/updates InRelease'
> > is not signed. N: Updating from such a repository can't be done
> > securely, and is therefore disabled by default. N: See apt-secure(8)
> > manpage for repository creation and user configuration details. W: GPG
> > error:http://deb.debian.org/debian  buster-updates InRelease: The
> > following signatures couldn't be verified because the public key is
> > not available: NO_PUBKEY 648ACFD622F3D138 NO_PUBKEY 0E98404D386FA1D9
> > E: The repository 'http://deb.debian.org/debian  buster-updates
> > InRelease' is not signed. N: Updating from such a repository can't be
> > done securely, and is therefore disabled by default. N: See
> > apt-secure(8) manpage for repository creation and user configuration
> > details. 21:46:50 [ 0] root@debian: /etc/apt #

As you can see, the plain text version of your email is not very 
readable. I suggest you follow the earlier advice, and set Thunderbird 
to compose your email as plain text, even if only for list mail.

Cheers,
Richard