HL7: Split up batch file

Use the the hl7.batch module to split an HL7 batch file into a table of HL7 messages

Streaming File Operations

Use the stream.lua module and builtin io file functions to deal with large files

Run program on POSIX

How to use builtin functions to run a command line program on POSIX systems

Edit a crontab

Use the cron.edit module to edit (read or write) a crontab