Acronis Backup for Linux Server - User Guide - Manual (Page 22)

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Backup plan's credentials
Any backup plan running on a machine runs on behalf of a user.
In Windows
By default, the plan runs under the agent service account, if created by a user having administrative
privileges on the machine. If created by a regular user, such as a member of the Users group, the
plan runs under this user's account.
When creating a backup plan, you are only asked for credentials in specific cases. For example:

You are scheduling backups as a regular user and did not enter credentials when connecting the
console to the machine. This may be the case when the console is installed on the same machine
that you are backing up.

You are backing up a Microsoft Exchange cluster to a storage node.
Specifying the credentials explicitly
You have the option to explicitly specify a user account under which the backup plan will run. To do
this, on the backup plan creation page:
1. In the Plan parameters section, click Show plan's credentials, comments, label.
2. Click Plan's credentials.
3. Enter the credentials under which the plan will run. When entering the name of an Active
Directory user account, be sure to also specify the domain name (DOMAIN\Username or
Username@domain).
In Linux
You do not need to specify backup plan's credentials. In Linux, backup plans always run under the
root user account.
Task credentials
Like a backup plan, any task runs on behalf of a user.
In Windows
When creating a task, you have the option to explicitly specify an account under which the task will
run. Your choice depends on whether the task is intended for manual start or for executing on
schedule.

Manual start
Every time you manually start the task, the task will run under the credentials with which you are
currently logged on. Any person that has administrative privileges on the machine can also start
the task. The task will run under this person's credentials.
The task will always run under the same credentials, regardless of the user who actually starts
the task, if you specify the task credentials explicitly.

Scheduled or postponed start
The task credentials are mandatory. You cannot complete the task creation until you specify the
task credentials. Task credentials are specified on the task creation page in a similar manner as
the plan’s credentials are specified.
In Linux
You do not need to specify task credentials. In Linux, tasks always run under the root user account.