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% podman-image-sign(1)
## NAME
podman-image-sign - Create a signature for an image
## SYNOPSIS
**podman image sign** [*options*] *image* [*image* ...]
## DESCRIPTION
**podman image sign** will create a local signature for one or more local images that have
been pulled from a registry. The signature will be written to a directory
derived from the registry configuration files in /etc/containers/registries.d. By default, the signature will be written into /var/lib/containers/sigstore directory.
## OPTIONS
**--help**, **-h**
Print usage statement.
**--cert-dir**=*path*
Use certificates at *path* (\*.crt, \*.cert, \*.key) to connect to the registry.
Default certificates directory is _/etc/containers/certs.d_. (Not available for remote commands)
**--directory**, **-d**=*dir*
Store the signatures in the specified directory. Default: /var/lib/containers/sigstore
**--sign-by**=*identity*
Override the default identity of the signature.
## EXAMPLES
Sign the busybox image with the identify of foo@bar.com with a user's keyring and save the signature in /tmp/signatures/.
sudo podman image sign --sign-by foo@bar.com --directory /tmp/signatures docker://privateregistry.example.com/foobar
## RELATED CONFIGURATION
The write (and read) location for signatures is defined in YAML-based
configuration files in /etc/containers/registries.d/. When you sign
an image, podman will use those configuration files to determine
where to write the signature based on the the name of the originating
registry or a default storage value unless overriden with the --directory
option. For example, consider the following configuration file.
docker:
privateregistry.example.com:
sigstore: file:///var/lib/containers/sigstore
When signing an image preceded with the registry name 'privateregistry.example.com',
the signature will be written into sub-directories of
/var/lib/containers/sigstore/privateregistry.example.com. The use of 'sigstore' also means
the signature will be 'read' from that same location on a pull-related function.
## HISTORY
November 2018, Originally compiled by Qi Wang (qiwan at redhat dot com)
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