Redirecting Command Result to File

Redirect command output and error logs to files for parsing and review.

Read time 2 minutes

Last updated 3 months ago

When running a command, the output is usually visible through the command line interface. However, it's also possible to pipe the command's result and error logs to files.

Recommendation

In order to have parseable and easy to read content in your files, use your command with the

--json

option. This is what a command with the

--json

option might look like:


ugs env list --json

Redirecting a command's result (stdout)

To redirect the result of a command to a file, add

1> res.json

to the end of your command. When your command succeeds, its result will be redirected to the

res.json

file.

Redirecting a command's error output (stderr)

To redirect the error output of a command to a file, add

2> logs.json

to the end of your command. Any error during the execution of your command will end up in the

logs.json

file.

Example

Here's an example of what a command with stdout and stderr piping might look like:


ugs env list --json 1> res.json 2> logs.json

On success, a file named

res.json

is generated. Here's an example of what that file might contain


[  {    "id": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",    "projectId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",    "name": "production",    "isDefault": true,    "createdAt": "2022-07-27",    "updatedAt": "2022-12-22",    "archivedAt": null  }]

On failure, a file named

logs.json

is generated. Here's an example of what that file might contain


[  {    "Message": "You are not logged into any service account. Please login using the 'ugs login' command.",    "Type": "Error"  }]

Notes

The file names provided as example

res.json

and

logs.json

are arbitrary names. You may change them to fit your needs.

Although the example uses both result piping and error piping at the same time, you may also use only one or the other.

When using piping, no output will be logged on the command line interface.

Documentation

Development

User Acquisition

Monetization

Industry