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duplicity:tldr:bb06e
This command uses the duplicity
tool to perform a backup operation. Let's breakdown the command:
-
duplicity
: This is the actual command that invokes theduplicity
tool. -
--full-if-older-than ${1M}
: This option specifies that a full backup should be performed if the time since the last full backup exceeds a certain threshold.${1M}
is a variable that represents a specific time duration, in this case, it means "1 month". -
--use-new-style
: This flag instructsduplicity
to use the new backup archive format. -
s3://${bucket_name[-prefix]}
: This specifies the source directory or storage location for the backup. In this case, it is an Amazon S3 bucket.${bucket_name[-prefix]}
is a variable representing the name or prefix of the S3 bucket.
Overall, this command tells the duplicity
tool to perform a backup on the specified S3 bucket, using the new backup format. If the time since the last full backup is greater than 1 month, a full backup will be executed.