NAME

       apptainer-sign - Add digital signature(s) to an image

SYNOPSIS

       apptainer sign [sign options...]

DESCRIPTION

       The sign command allows a user to add one or more digital signatures to a SIF
         image. By default, one digital signature is added for each object group in
         the file.

       Key material can be provided via PEM-encoded file, or an entity in the PGP
         keyring. To manage the PGP keyring, see 'apptainer help key'.

OPTIONS

       -g, --group-id=0      sign objects with the specified group ID

       -h, --help[=false]      help for sign

       --key=""      path to the private key file

       -k, --keyidx=0      PGP private key to use (index from 'key list --secret')

       -i, --sif-id=0      sign object with the specified ID

EXAMPLE

         Sign with a private key:
         $ apptainer sign --key private.pem container.sif

         Sign with PGP:
         $ apptainer sign container.sif

SEE ALSO

       apptainer(1)

HISTORY

       3-Nov-2025 Auto generated by spf13/cobra

Auto generated by spf13/cobra                       Nov 2025                                        apptainer(1)