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gcloud compute os-login ssh-keys update

NAME
gcloud compute os-login ssh-keys update - update an SSH public key in an OS Login profile
SYNOPSIS
gcloud compute os-login ssh-keys update --ttl=TTL (--key=KEY     | --key-file=KEY_FILE) [GCLOUD_WIDE_FLAG …]
DESCRIPTION
gcloud compute os-login ssh-keys update accepts either a string containing an SSH public key or a filename for an SSH public key, and updates the key in the user's OS Login profile. Currently, only the expiration time, --ttl, can be updated.
EXAMPLES
To update the SSH public key found in /home/user/.ssh/id_rsa.pub with an expiration time of one week from now, run: 
gcloud compute os-login ssh-keys update --ttl=7d --key-file=/home/user/.ssh/id_rsa.pub

To update the SSH public key with a fingerprint of 'e0d96d6fad35a61a0577f467940509b5aa08b6dea8d99456ec19a6e47126bc52' and an expiration time of five years from now, run: 

gcloud compute os-login ssh-keys update --ttl=5y --key='e0d96d6fad35a61a0577f467940509b5aa08b6dea8d99456ec19a6e47126bc52'
REQUIRED FLAGS
--ttl=TTL
The amount of time before the SSH key expires. For example, specifying 30m will set the expiration time on the SSH key for 30 minutes from the current time. A value of 0 will result in no expiration time. See $ gcloud topic datetimes for information on duration formats.
Exactly one of these must be specified:
--key=KEY
The SSH public key to update the OS Login Profile. Key value can either be the SSH key or the OS Login fingerprint of the key.
--key-file=KEY_FILE
The path to a file containing an SSH public key to update the OS Login Profile. Key value can either be the SSH key or the OS Login fingerprint of the key.
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
These variants are also available: 
gcloud alpha compute os-login ssh-keys update
 
gcloud beta compute os-login ssh-keys update