mdsum(1) GNU Telephony mdsum(1)NAME
mdsum - compute file digests using any supported algorithms.
SYNOPSIS
mdsum [options] [paths...]
DESCRIPTION
This command computes a message digest for one or more specified files. If no files are specified, then stdin can be used. Any digest
algorithm available in libusecure may be selected and used. Entire directory trees may also be examined and computed using the -R
(--recursive) option.
OPTIONS --digest=name
Specify name of digest algorithm. By default md5 will be used, unless the command is executed through a symlink which happens to
match an algorithm name.
--follow
Dereference and follow symlinks. Otherwise they are ignored.
--recursive
If argument is a directory, recursively scan directory and any subdirectory contents as arguments.
--help Outputs help screen for the user.
AUTHOR
mdsum was written by David Sugar <dyfet@gnutelephony.org>.
REPORTING BUGS
Report bugs to bug-commoncpp@gnu.org.
COPYRIGHT
Copyright (C) 2010 David Sugar, Tycho Softworks.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
GNU uCommon January 2010 mdsum(1)
Check Out this Related Man Page
zerofill(1) GNU Telephony zerofill(1)NAME
zerofill - clear unused disk space and blank devices.
SYNOPSIS
zerofill [options] [devices] ...
DESCRIPTION
This command is a relative of nullfile. Like nullfile, it can be used to write all unused disk space with '0', thereby making file systems
that are stored on virtual machines easier to pack. In addition, zerofill can fill unused disk space with random data before zeroing,
which can be useful to remove forensic trace of deleted files. Finally, zerofile can be told to operate on and zero (erase) complete disk
devices.
OPTIONS --random=count
Number of passes to use writing random data before wiping data.
--help Outputs help screen for the user.
AUTHOR
zerofill was written by David Sugar <dyfet@gnutelephony.org>.
REPORTING BUGS
Report bugs to bug-commoncpp@gnu.org.
COPYRIGHT
Copyright (C) 2010 David Sugar, Tycho Softworks.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
GNU uCommon January 2010 zerofill(1)
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