Linux "c_rehash" Command Line Options and Examples
Create symbolic links to files named by the hash values
On some platforms, the OpenSSL rehash command is available as an external script called c_rehash. They are functionally equivalent, except for minor differences noted below. rehash scans directories and calculates a hash value of each ".
Usage:
openssl rehash [-h] [-help] [-old] [-n] [-v] [ directory...]
c_rehash flags...
Command Line Options:
-help
Display a brief usage message.
c_rehash -help ...
-old
Use old-style hashing (MD5, as opposed to SHA-1) for generating links to be used for releases before 1.0.0. Note that currentversions will not use the old style.
c_rehash -old ...
-n
Do not remove existing links. This is needed when keeping new and old-style links in the same directory.
c_rehash -n ...