# Recoll user manual
Configuration overview

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### Environment variables

`RECOLL_CONFDIR`

  Defines the main configuration directory.

`RECOLL_TMPDIR, TMPDIR`

  Locations for temporary files, in this order of priority. The default if none of these is set is to use `/tmp`. Big temporary files may be created during indexing, mostly for decompressing, and also for processing, e.g. email attachments.

`RECOLL_CONFTOP, RECOLL_CONFMID`

  Allow adding configuration directories with priorities below and above the user directory (see above the Configuration overview section for details).

`RECOLL_EXTRA_DBS, RECOLL_ACTIVE_EXTRA_DBS`

  Help for setting up external indexes. See this paragraph for explanations.

`RECOLL_DATADIR`

  Defines replacement for the default location of Recoll data files, normally found in, e.g., `/usr/share/recoll`).

`RECOLL_FILTERSDIR`

  Defines replacement for the default location of Recoll filters, normally found in, e.g., `/usr/share/recoll/filters`).

`ASPELL_PROG`

  aspell program to use for creating the spelling dictionary. The result has to be compatible with the `libaspell` which Recoll is using.

`VARNAME`

  Blabla

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