gcloud alpha compute instances tail-serial-port-output

NAME
gcloud alpha compute instances tail-serial-port-output - periodically fetch new output from a virtual machine instance's serial port and display it as it becomes available
SYNOPSIS
gcloud alpha compute instances tail-serial-port-outputINSTANCE_NAME[--port=PORT][--zone=ZONE][GCLOUD_WIDE_FLAG …]
DESCRIPTION
(ALPHA) gcloud alpha compute instances tail-serial-port-output isused to tail the output from a Compute Engine virtual machine instance's serialport. The serial port output from the instance will be printed to standardoutput. This information can be useful for diagnostic purposes.
EXAMPLES
To fetch new output from instance's serial port and display it, run:
gcloudalphacomputeinstancestail-serial-port-outputexample-instance--zone=us-central1-b
POSITIONAL ARGUMENTS
INSTANCE_NAME
Name of the instance to operate on. For details on valid instance names, referto the criteria documented under the field 'name' at:https://cloud.google.com/compute/docs/reference/rest/v1/instances
FLAGS
--port=PORT
Instances can support up to four serial port outputs, numbered 1 through 4. Bydefault, this command will return the output of the first serial port. Settingthis flag will return the output of the requested serial port.
--zone=ZONE
Zone of the instance to operate on. If not specified, you might be prompted toselect a zone (interactive mode only).gcloud attempts to identify theappropriate zone by searching for resources in your currently active project. Ifthe zone cannot be determined,gcloud prompts you for a selection withall available Google Cloud Platform zones.

To avoid prompting when this flag is omitted, the user can set thecompute/zone property:

gcloudconfigsetcompute/zoneZONE

A list of zones can be fetched by running:

gcloudcomputezoneslist

To unset the property, run:

gcloudconfigunsetcompute/zone

Alternatively, the zone can be stored in the environment variableCLOUDSDK_COMPUTE_ZONE.

GCLOUD WIDE FLAGS
These flags are available to all commands:--access-token-file,--account,--billing-project,--configuration,--flags-file,--flatten,--format,--help,--impersonate-service-account,--log-http,--project,--quiet,--trace-token,--user-output-enabled,--verbosity.

Run$gcloud help for details.

NOTES
This command is currently in alpha and might change without notice. If thiscommand fails with API permission errors despite specifying the correct project,you might be trying to access an API with an invitation-only early accessallowlist. These variants are also available:
gcloudcomputeinstancestail-serial-port-output
gcloudbetacomputeinstancestail-serial-port-output

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Last updated 2025-05-07 UTC.