Hello, I am having problems using cbbackup backup

Using three couchbases to form a collection, the following problem occurs when using
cbbackup http://ip:port /home/backup/couchbase20181106/ -u user -p ‘password’ --single-node

version:cassandra-2.0.9

######################################] 55115.6% (19410053/35217 msgs)
bucket: usercenter, msgs transferred…
: total | last | per sec
batch : 26680 | 26680 | 13.0
byte : 2408338 | 2408338 | 1176.9
msg : 19518353 | 19518353 | 9538.5
done

/home/backup/couchbase20181106/ Nothing in the directory, execute the cbbackup directory

[root@local backup]# rm ./*
rm:Whether to delete ordinary files"./\372\200\200\257\373\220\201\257\373\260\201\245\372\200\201\243\373\240\201\241\371\220\201\256
rm:Whether to delete ordinary files "./\372\200\200\257\373\220\201\257\373\260\201\245\372\200\201\243\373\240\201\241\371\220\201\256\371\240\201\254\373\240\201\257\373\260\201\245\370\220\201\242\372\

please help