如何在unix中拆分带偏移值的日志文件？

I have a really big log file (9GB -- I know I need to fix that) on my box. I need to split into chunks so I can upload it to amazon S3 for backup. S3 has a max file size of 5GB. So I would like to split this into several chunks and then upload each one. I have a really big log file (9GB -- I know I n