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mdata-put - Online in the Cloud

Run mdata-put in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command mdata-put that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



mdata-put -- Set the value of a metadata key-value pair.


/usr/sbin/mdata-put keyname [ value ]


The mdata-put command allows the user (or a script) to modify the metadata for a guest
instance running in a SmartDataCenter (SDC) cloud. Metadata values are generally set
programmatically via CloudAPI, or during interactive provisioning via a Web Portal. The
value of a key-value pair may be obtained by passing its name to the mdata-get command.

The key-value pair named keyname will be updated in the metadata store for this instance.
If a value argument is provided on the command-line, then that value will be used.
Otherwise, if stdin is not a tty, the value will be read from stdin.

If the metadata service is unavailable at the time of the request, this command will block
waiting for it to become available. Non-transient failures, such as the non-existence of
the requested keyname, will cause the program to exit with a non-zero status. Depending
on the nature of the error, some diagnostic output may be printed to stderr.


The following exit values are returned:

Successful completion.

The requested keyname was valid, and its value was updated.

An error occurred.

An unexpected error condition occurred, which is believed to be a non-transient
condition. Retrying the request is not expected to resolve the error condition;
either a software bug or misconfiguration exists.

A usage error occurred.

Malformed arguments were passed to the program. Check the usage instructions to
ensure valid arguments are supplied.

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