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Berkeley DB Reference Guide:
  Dumping and Reloading

# Loading text into databases

The db_load utility can be used to load text into databases. The -T option permits non-database applications to create flat-text files that are then loaded into databases for fast, highly-concurrent access. For example, the following command loads the standard UNIX /etc/passwd file into a database, with the login name as the key item and the entire password entry as the data item:

>     awk -F: '{print $1; print $0}' < /etc/passwd |\
>     	sed 's/\\/\\\\/g' | db_load -T -t hash passwd.db

Note that backslash characters naturally occurring in the text are escaped to avoid interpretation as escape characters by db_load.

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