The kdb tool allows users to interact with Elektra’s Key Database via the command line. This tutorial explains the export function of kdb. This command lets you export Keys from the Elektra Key Database.
The command to use kdb export is:
kdb export [options] source [format]In this command, source is the root key of which Keys should be exported. For
instance, kdb export system:/export would export all the keys below
system:/export. Additionally, this command exports keys under the system:/elektra
directory by default. It does this so that information about the keys stored under
this directory will be included if the Keys are later imported into an Elektra Key
Database. This command exports keys to stdout to store them into the Elektra
Key Database. Typically, the export command is used with redirection to write the
Keys to a file.
The format argument can be a very powerful option to use with kdb export.
The format argument allows a user to specify which plugin is used to export the
keys from the key database. The user can specify any storage plugin to serve as the
format for the exported Keys. For instance, if a user mounted their hosts file to system:/hosts
using kdb mount /etc/hosts system:/hosts hosts, they would be able to export these keys using
the hosts format by using the command kdb export system:/hosts hosts > hosts.ecf.
This command would essentially create a backup of their current /etc/hosts file in a valid format
for /etc/hosts.
If no format is specified, the format dump will be used instead. The dump format is the standard way
of expressing keys and all their relevant information. This format is intended to be used only within Elektra.
The dump format is a good means of backing up Keys from the key database for use with Elektra later
such as reimporting them later. As of this writing, dump is the only way to fully preserve all parts of the
KeySet.
The kdb export command takes one special option: -E or alternatively --without-elektra, which tells kdb to omit the system:/elektra directory of keys.
kdb export system:/backup > backup.ecfThis command would export all keys stored under system:/backup, along with relevant keys in system:/elektra, into a file called backup.ecf.