socket.gaierror: [Errno -2] Name or service not known message

[cemzafer]

Hi,
I tried the script like this;
rotate-backups-s3 -U -P --daily=7 --weekly=4 --monthly=11 --yearly=1 --dry-run s3://bucket_name/a/aa/
This command returns the following error like this. Could you please clarify the problem?
Thanks.

Traceback (most recent call last):
File "/usr/bin/rotate-backups-s3", line 9, in
load_entry_point('rotate-backups-s3==0.3', 'console_scripts', 'rotate-backups-s3')()
File "/usr/lib/python2.7/site-packages/rotate_backups_s3/cli.py", line 189, in main
).rotate_backups(bucket)
File "/usr/lib/python2.7/site-packages/rotate_backups_s3/init.py", line 127, in rotate_backups
bucket = self.conn.get_bucket(bucketname)
File "/usr/lib/python2.7/site-packages/boto/s3/connection.py", line 509, in get_bucket
return self.head_bucket(bucket_name, headers=headers)
File "/usr/lib/python2.7/site-packages/boto/s3/connection.py", line 528, in head_bucket
response = self.make_request('HEAD', bucket_name, headers=headers)
File "/usr/lib/python2.7/site-packages/boto/s3/connection.py", line 671, in make_request
retry_handler=retry_handler
File "/usr/lib/python2.7/site-packages/boto/connection.py", line 1071, in make_request
retry_handler=retry_handler)
File "/usr/lib/python2.7/site-packages/boto/connection.py", line 1030, in _mexe
raise ex
socket.gaierror: [Errno -2] Name or service not known