~# man innochecksum | grep -v "^$" | head -n 45

INNOCHECKSUM(1)                                                          MariaDB Database System                                                          INNOCHECKSUM(1)

NAME

       innochecksum - offline InnoDB file checksum utility

SYNOPSIS

       innochecksum [options] file_name

DESCRIPTION

       innochecksum prints checksums for InnoDB files. This tool reads an InnoDB tablespace file, calculates the checksum for each page, compares the calculated checksum

       to the stored checksum, and reports mismatches, which indicate damaged pages. It was originally developed to speed up verifying the integrity of tablespace files

       after power outages but can also be used after file copies. Because checksum mismatches will cause InnoDB to deliberately shut down a running server, it can be

       preferable to use this tool rather than waiting for a server in production usage to encounter the damaged pages.

       innochecksum cannot be used on tablespace files that the server already has open. For such files, you should use CHECK TABLE to check tables within the

       tablespace.

       If checksum mismatches are found, you would normally restore the tablespace from backup or start the server and attempt to use mysqldump to make a backup of the

       tables within the tablespace.

       Invoke innochecksum like this:

           shell> innochecksum [options] file_name

       innochecksum supports the following options. For options that refer to page numbers, the numbers are zero-based.

       ·   -?, --help

           Displays help and exits.

       ·   -c, --count

           Print a count of the number of pages in the file.

       ·   -d, --debug

           Debug mode; prints checksums for each page.

       ·   -e num, --end-page=#

           End at this page number.

       ·   -i, --per-page-details

           Print out per-page detail information.

       ·   -I, --info

           Synonym for --help.

       ·   -l, --leaf

           Examine leaf index pages.

       ·   -m num, --merge=#

           Leaf page count if merge given number of consecutive pages.

       ·   -p num, --page-num=#

           Check only this page number.

       ·   -s num, --start-page

           Start at this page number.

       ·   -u, --skip-corrupt

           Skip corrupt pages.

       ·   -v, --verbose

           Verbose mode; print a progress indicator every five seconds.

       ·   -V, --version

           Displays version information and exits.

COPYRIGHT

       Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc., 2010-2020 MariaDB Foundation

~# innochecksum -Sd /var/lib/mysql/ibdata1

innochecksum: unknown option '-d'

~# innochecksum -?

innochecksum Ver 10.11.3, for Linux (x86_64)

Copyright (c) 2000, 2018, Oracle, MariaDB Corporation Ab and others.

InnoDB offline file checksum utility.

Usage: innochecksum [-c] [-s <start page>] [-e <end page>] [-p <page>] [-i] [-v]  [-a <allow mismatches>] [-n] [-S] [-D <page type dump>] [-l <log>] [-l] [-m <merge pages>] <filename or [-]>

See https://mariadb.com/kb/en/library/innochecksum/ for usage hints.

  -?, --help          Displays this help and exits.

  -I, --info          Synonym for --help.

  -V, --version       Displays version information and exits.

  -v, --verbose       Verbose (prints progress every 5 seconds).

  -c, --count         Print the count of pages in the file and exits.

  -s, --start-page=#  Start on this page number (0 based).

  -e, --end-page=#    End at this page number (0 based).

  -p, --page=#        Check only this page (0 based).

  -n, --no-check      Ignore the checksum verification.

  -a, --allow-mismatches=#

                      Maximum checksum mismatch allowed.

  -w, --write         Rewrite the checksum.

  -S, --page-type-summary

                      Display a count of each page type in a tablespace.

  -D, --page-type-dump=name

                      Dump the page type info for each page in a tablespace.

  -i, --per-page-details

                      Print out per-page detail information.

  -l, --log=name      log output.

  -f, --leaf          Examine leaf index pages

  -m, --merge=#       leaf page count if merge given number of consecutive

                      pages

Variables (--variable-name=value)

and boolean options {FALSE|TRUE}  Value (after reading options)

--------------------------------- ----------------------------------------

verbose                           FALSE

count                             FALSE

start-page                        0

end-page                          0

page                              0

no-check                          FALSE

allow-mismatches                  0

write                             FALSE

page-type-summary                 FALSE

page-type-dump                    (No default value)

per-page-details                  FALSE

log                               (No default value)

leaf                              FALSE

merge                             0

~#