What is the equivalent of Unix c_rehash command/script on Linux?

Question

I am following the instructions on how to import a certificate with its whole chain into a keystore. The problem I face is that I do not have c_rehash on my system:

user@hostanme$ c_rehash ./certs
-bash: c_rehash: command not found

I have found the -subject_hash option of openssl x509, but I am not sure how to use it to replicate whatever c_rehash does.

How can I hash the certificate directory without the c_rehash command/script?

Answer 1

c_rehash needs "perl" for execution. If you can not run c_rehase, try below.

use "openssl" in the Shell file

for file in *.pem; do ln -s "$file" "$(openssl x509 -hash -noout -in "$file")".0; done