This manual page documents the GNU version of updatedb, which updates file name databases used by GNU locate. The file name databases contain lists of files that were in particular directory trees when the databases were last updated. The file name of the default database is determined when locate and updatedb are configured and installed. The frequency with which the databases are updated and the directories for which they contain entries depend on how often updatedb is run, and with which arguments.
In networked environments, it often makes sense to build a database at the root of each filesystem, containing the entries for that filesystem. updatedb is then run for each filesystem on the fileserver where that filesystem is on a local disk, to prevent thrashing the network. Users can select which databases locate searches using an environment variable or command line option; see locate(1L). Databases can not be concatenated together.
Non-network directories to put in the database. Default is /.
Network (NFS, AFS, RFS, etc.) directories to put in the database. The environment variable NETPATHS also sets this value. Default is none.
Directories to not put in the database, which would otherwise be. The environment variable PRUNEPATHS also sets this value. Default is /tmp /usr/tmp /var/tmp /afs.
File systems to not put in the database, which would otherwise be. Note that files are pruned when a file system is reached; Any file system mounted under an undesired file system will be ignored. The environment variable PRUNEFS also sets this value. Default is nfs NFS proc.
The database file to build. Default is system-dependent. In Debian GNU/Linux, the default is /var/lib/locate/locatedb.
The user to search non-network directories as, using su(1). Default is to search the non-network directories as the current user. You can also use the environment variable LOCALUSER to set this user.
The user to search network directories as, using su(1). Default is daemon. You can also use the environment variable NETUSER to set this user.
Create the database in the old format instead of the new one.
Print the version number of updatedb and exit.
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