I have three txt files in s3 bucket nearly 5GB I want to remove last line from all the three files and save as it is I want to do this using lambda function using boto3

Question

I have three .txt files in s3 bucket (nearly 5GB), I want to remove the last line from all the three files and save as it is, I want to do this using lambda function using boto3, I am not able to do this, Please help.

Answer 1

Hi@Shubh,

According to my knowledge,  you can't edit s3 files directly in s3. But you can sync your bucket locally and upload your changes to the s3 bucket.

• First, sync your file from the s3 bucket to your local system.

C:\Users\NADIM AKTHAR\Desktop\New folder>aws s3 sync s3://bucketnadim bucket.txt
download: s3://bucketnadim/bucket.txt to bucket.txt\bucket.txt
download: s3://bucketnadim/123.jpg to bucket.txt\123.jpg

• Then modify your file and upload it to the s3 bucket.

C:\Users\NADIM AKTHAR\Desktop\New folder>aws s3 sync bucket.txt s3://bucketnadim
upload: bucket.txt\bucket.txt to s3://bucketnadim/bucket.txt