**To update a trail** The following ``update-trail`` command updates a trail to use an existing bucket for log delivery:: aws cloudtrail update-trail --name Trail1 --s3-bucket-name my-bucket Output:: { "IncludeGlobalServiceEvents": true, "Name": "Trail1", "TrailARN": "arn:aws:cloudtrail:us-west-2:123456789012:trail/Trail1", "LogFileValidationEnabled": false, "IsMultiRegionTrail": true, "S3BucketName": "my-bucket" }