Why do I need to have elevated permissions to access the last failed logins (
/var/log/btmp) but not for the last successfull logins (
/var/log/wtmp). (At least per default on debian/ubuntu linux - my system: debian 9)
Are there any security considerations?
Basically I would like to run
lastb on every login and thus set read permission for all users
chmod o+r /var/log/btmp. Any contradictions?