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freedup (fsutils)
September 2008


Links substantially identical, duplicate files to save file system space


symharden - convert a symbolic link into a hardlink


symharden [SYMBOLICLINK]


the given symbolic link will be replaced by a hard link to that very file, where the previous link pointed to. If unresolvable, symharden will fail. If you do not give a symbolic link, another error is shown. Do not link files that do have no contents, i.e. file size is zero. This avoids large link clusters.


symharden is developed in POSIX compliant C under Linux/AMD, and tested with Linux/Intel, RaspberryPi/armhl, Cygwin/WindowsXP, AIX 4.3.3 and AIX 5.3. Please try always to use the newest release from and keep the author informed of severe bugs, since he uses the program frequently himself.


Report bugs to <>.


Copyright © 2007 Andreas Neuper
FreeDup is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
FreeDup is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with FreeDup. If not, see <>.


, freedup(1)
The best documentation for freedup is maintained within the source code.
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