Check If File Exists In S3 Bucket

Answer :

If you do aws s3 ls on the actual filename. If the filename exists, the exit code will be 0 and the filename will be displayed, otherwise, the exit code will not be 0:

aws s3 ls s3://bucket/filname if [[ $? -ne 0 ]]; then   echo "File does not exist" fi 

first answer is close but in cases where you use -e in shebang, the script will fail which you would most like not want. It is better to use wordcount. So you can use the below command:

wordcount=`aws s3 ls s3://${S3_BUCKET_NAME}/${folder}/|grep $${file}|wc -c` echo wordcount=${wordcount} if [[ "${wordcount}" -eq 0 ]]; then do something else do something fi 

Try the following :

aws s3api head-object --bucket ${S3_BUCKET} --key ${S3_KEY} 

It retrieves the metadata of the object without retrieving the object itself. READ(s3:GetObject) access is required. .