Is there a way to set
pam library to do case-preserving username validation? Is there a way to set
useradd command to accept and preserve the case of usernames? I know usernames and URLs are not OS related, so better Linux preserve their case. Will
pam accept if someone contributes case preserving module? I don't want to use samba active directory configuration.
echo $USER should print case preserved username, while
login can ignore the case.