The anti-deletion undelete under SCO Unix

SCO OpenServer supports versioning filesystems (undelete), but the default does not turn on this feature, the following are the specifics:

1) Select Hardware/kernel Manager in Scoadmin, select filesystem configuration,

Set Maxvdepth to a value other than 0 (n= How many previous versions are saved, consider disk space when setting a larger number)

Set Minvtime (number of seconds to wait before file versioned)

2) Recompile (relink) kernel;

3 Reboot the server;

4 Enable undelete for directories that need to be set undelete (for example:/u/data)

Undelete-s/u/data

5 in order to see the versioned situation, set the following environment variables:

Showversions=1; Export Showversions

6 Check the versioned file with the document, you can restore the deleted or overwritten files as needed.

Undelete supports the following options:

If the-l,-p,-S,-u and-v options are not specified, undelete recovers the specified files.

-L

Print a listing of all versions of the specified file (s)

-P

Purge (permanently delete) specified source file (s)

-S

Turn the specified directories and its subsequent child directories

-U

Turn the version attribute off for the specified directories

-V

Force the specified file (s) to be versioned

The following additional options are recognized:

-D

Normally, if the specified file is a directory, undelete'll operate on the files contained in that directory. If This option is specified, undelete operates on the directory itself.

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Note:undelete does not work on directories that are mounted.

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-I.

Undelete'll prompt for confirmation prior to recovering a file that'll overwrite the current version of the file. A y answer means that the undeletion should proceed. Any other answer prevents undelete from undeleting the file.

-F

Undelete would recover the file (s) without prompting even if it is overwriting over a existing current version of the file . This option overrides the-i option. The ' This ' is ' the ' default if ' standard ' is ' not ' a terminal.

-R

Undelete'll operate recursively on any directories in the argument list. Symbolic links that are encountered and this option is traversed.

-M [+-]days

Undelete'll only consider the files that were deleted less than (-), greater than (+) or exactly (Neither-nor +) days ago.