Cannot sign commit with exported GPG key from other machine

Question

I need help with gpg key in git. First I export keys from windows with this:

gpg --output backupkeys.pgp --armor --export-secret-keys --export-options export-backup user@email

Then on linux I import this key

gpg --import backupkeys.pgp

and change from unknown to ultimate. So this is how I import this key to linux. But now I need add gpg key to git, so I do this:

git config --global user.signingkey mySuperKey

but when I can create commit

git commit -S -m "Super Commit"

I have this output

error: gpg failed to sign the data
fatal: failed to write commit object

I don't know where is problem.

Does gpg work by itself? What happens if you run `echo hello world | gpg -sa -u user@email`? — larsks, Jan 17 '22 at 13:06
Probably no `gpg: signing failed: Inappropriate ioctl for device -----BEGIN PGP MESSAGE----- gpg: signing failed: Inappropriate ioctl for device` — ERROR_404, Jan 17 '22 at 13:39

score 0 · Accepted Answer · answered Jan 17 '22 at 15:09

After trying exporting new GPG keys and later import. I found answare for this problem.

echo hello world | gpg -sa -u user@email

if I try this don't show this:

gpg: signing failed: Inappropriate ioctl for device
gpg: [stdin]: clear-sign failed: Inappropriate ioctl for device

So all what I need to do is this:

export GPG_TTY=$(tty)

1 Answers1