# phpman > man > db_recover(1) [DB5.3_RECOVER(1)](https://www.chedong.com/phpMan.php/man/DB5.3RECOVER/1/markdown) General Commands Manual [DB5.3_RECOVER(1)](https://www.chedong.com/phpMan.php/man/DB5.3RECOVER/1/markdown) ## NAME db5.3_recover - Restore the database to a consistent state ## SYNOPSIS **db5.3**___**recover** [-ceVv] [-h home] [-P password] [-t [[CC]YY]MMDDhhmm[.SS]]] ## DESCRIPTION The db5.3_recover utility must be run after an unexpected application, Berkeley DB, or system failure to restore the database to a consistent state. All committed transactions are guaran‐ teed to appear after db5.3_recover has run, and all uncommitted transactions will be com‐ pletely undone. ## OPTIONS ### -c ### -e a DB_CONFIG file is present in the home directory. If a DB_CONFIG file is not present, then the regions will be created with default parameter values. ### -h directory is used. ### -P strings as soon as possible, be aware there may be a window of vulnerability on sys‐ tems where unprivileged users can see command-line arguments or where utilities are not able to overwrite the memory containing the command-line arguments. ### -t timestamp argument should be in the form [[CC]YY]MMDDhhmm[.SS] where each pair of let‐ ters represents the following: CC The first two digits of the year (the century). YY The second two digits of the year. If "YY" is specified, but "CC" is not, a value for "YY" between 69 and 99 results in a "CC" value of 19. Otherwise, a "YY" value of 20 is used. MM The month of the year, from 1 to 12. DD The day of the month, from 1 to 31. hh The hour of the day, from 0 to 23. mm The minute of the hour, from 0 to 59. SS The second of the minute, from 0 to 61. If the "CC" and "YY" letter pairs are not specified, the values default to the current year. If the "SS" letter pair is not specified, the value defaults to 0. ### -V ### -v In the case of catastrophic recovery, an archival copy - or _snapshot_ - of all database files must be restored along with all of the log files written since the database file snapshot was made. (If disk space is a problem, log files may be referenced by symbolic links). If the failure was not catastrophic, the files present on the system at the time of failure are sufficient to perform recovery. If log files are missing, db5.3_recover will identify the missing log file(s) and fail, in which case the missing log files need to be restored and recovery performed again. The db5.3_recover utility uses a Berkeley DB environment (as described for the **-h** option, the environment variable **DB**___**HOME**, or because the utility was run in a directory containing a Berkeley DB environment). In order to avoid environment corruption when using a Berkeley DB environment, db5.3_recover should always be given the chance to detach from the environment and exit gracefully. To cause db5.3_recover to release all environment resources and exit cleanly, send it an interrupt signal (SIGINT). The db5.3_recover utility exits 0 on success, and >0 if an error occurs. ## ENVIRONMENT **DB**___**HOME** If the **-h** option is not specified and the environment variable DB_HOME is set, it is used as the path of the database home, as described in DB_ENV->open. ## AUTHORS Sleepycat Software, Inc. This manual page was created based on the HTML documentation for db_recover from Sleepycat, by Thijs Kinkhorst <>, for the Debian system (but may be used by others). 28 January 2005 [DB5.3_RECOVER(1)](https://www.chedong.com/phpMan.php/man/DB5.3RECOVER/1/markdown)