root@server:/# gpg --clearsign
gpg: directory `/root/.gnupg' created
gpg: can't open `/gnupg/options.skel': No such file or directory
gpg: keyring `/root/.gnupg/secring.gpg' created
gpg: keyring `/root/.gnupg/pubring.gpg' created
gpg: no default secret key: secret key not available
gpg: [stdin]: clearsign failed: secret key not available