srm source

srm(1)                                                                    srm(1)



NAME
       srm - securely remove files or directories

SYNOPSIS
       srm [OPTION]... FILE...

DESCRIPTION
       srm removes each specified file by overwriting, renaming, and truncating
       it before unlinking.  This prevents other people from undeleting or
       recovering any information about the file from the command line.  By
       default srm uses the simple mode to overwrite the file's contents.  You
       can choose a different overwrite mode with --dod, --doe, --openbsd,
       --rcmp, --gutmann.  If you specify more than one mode option, the last
       option is used.

       You can use srm to overwrite block devices.  The device node is not
       removed after overwriting.  This feature is available on Linux.  Files
       with multiple hard links will be unlinked but not overwritten.

       srm, like every program that uses the getopt function to parse its
       arguments, lets you use the -- option to indicate that all following
       arguments are non-options.  To remove a file called `-f' in the current
       directory, you could type either
              rm -- -f
       or
              rm ./-f

OPTIONS
       -d, --directory
              ignored (for compatibility with rm(1))

       -f, --force
              ignore nonexistent files, never prompt

       -i, --interactive
              prompt before any removal

       -r, -R, --recursive
              remove the contents of directories recursively

       -x, --one-file-system
              when removing a hierarchy recursively, skip any directory that is
              on a file system different from that of the corresponding command
              line argument.  (Not supported on Windows)

       -s, --simple
              Overwrite the file with a single pass of 0x00 bytes.  This is the
              default mode.

       -P, --openbsd
              OpenBSD compatible rm.  Files are overwritten three times, first
              with the byte 0xFF, then 0x00, and then 0xFF again, before they
              are deleted.

       -D, --dod
              US Dod compliant 7-pass overwrite.

       -E, --doe
              US DoE compliant 3-pass overwrite.  Twice with a random pattern,
              finally with the bytes "DoE".  See
              http://cio.energy.gov/CS-11_Clearing_and_Media_Sanitization_Guidance.pdf
              for details.

       -G, --gutmann
              Use the 35-pass Gutmann method.  See
              http://en.wikipedia.org/wiki/Gutmann_method for details.

       -C, --rcmp
              Royal Canadian Mounted Police compliant 3-pass overwrite.  First
              pass writes 0x00 bytes.  Second pass writes 0xFF bytes.  Third
              pass writes "RCMP".  See https://www.cse-
              cst.gc.ca/en/node/270/html/10572 for details.

       -v, --verbose
              explain what is being done.  Specify this option multiple times to
              increase verbosity.

       -h, --help
              display this help and exit.

       -V, --version
              output version information and exit.

SIGNALS
       SIGINFO, SIGUSR2
              show current write position and filename handled.

ENTIRE HARD DISKS
       srm can write to block devices on Linux.  You can use srm to securely
       delete an entire hard disk, however you should only do this for classic
       magnetic drives.  The modern solid state disks (SSD) have a faster and
       better way to erase all contents, Secure Erase.  For a Linux operating
       system see https://ata.wiki.kernel.org/index.php/ATA_Secure_Erase

NOTES
       srm can not remove write protected files owned by another user,
       regardless of the permissions on the directory containing the file.

       Development and discussion of srm is carried out at
       https://sourceforge.net/projects/srm/ which is also accessible via
       http://srm.sourceforge.net/.  See
       http://en.wikipedia.org/wiki/Data_remanence for a general discussion
       about overwriting data.

SEE ALSO
       rm(1)  http://www.gnu.org/software/coreutils/manual/coreutils.html#rm-invocation

       shred(1)
              http://www.gnu.org/software/coreutils/manual/coreutils.html#shred-invocation

       wipe(1)
              http://lambda-diode.com/software/wipe

       secure-delete
              http://packages.debian.org/lenny/secure-delete

       scrub(1)
              http://code.google.com/p/diskscrub/



Matt Gauthier, Dirk Jagdmann         1.2.14                               srm(1)

Locations of this man page

SystemPackageVersionNameFilename
Arch Linuxcommunity/srm1.2.14-1srm.1/usr/share/man/man1/srm.1.gz