Commands

The marc21 tool provides the following commands:

• concat — Concatenate records from multiple inputs (alias cat)
• count — Print the number of records in the input data (alias cnt)
• filter — Filter records that fulfill a specified condition
• hash — Compute SHA-256 checksum of records
• invalid — Output invalid records that cannot be decoded
• print — Print records in human readable format
• sample — Select a random permutation of records
• split — Split the input into chunks of a given size