Update README : how to create or revoke many certificates at once

README.md

@@ -137,6 +137,23 @@ Show help :
 shellpki help
 ~~~
 
+## Loop
+
+We can loop over a file to revoke or create many certificates at once.
+
+To revoke :
+
+~~~
+$ read CA_PASS
+$ for cert_name in $(cat /path/to/file_certs_to_revoke); do CA_PASSWORD=$CA_PASS shellpki revoke $cert_name --non-interactive ; done
+~~~
+
+To create (without `--replace-existing`) or renew (with `--replace-existing`), with a password on the client key :
+
+~~~
+$ for cert_name in $(cat /path/to/file_certs_to_create); do apg -n 1 -m 16 -M lcN > /path/to/folder/to/store/${cert_name}.passwd; CA_PASSWORD=$CA_PASS shellpki create --replace-existing --non-interactive --password-file /path/to/folder/to/store/${cert_name}.passwd ${cert_name}; done
+~~~
+
 ## License
 
 ShellPKI is an [Evolix](https://evolix.com) project and is licensed