Actually, the line which works without specifying a PATH in a cron.d file is the following:
@reboot root /bin/sleep 5 && /sbin/sysctl --system -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/50093 Title: Some sysctls are ignored on boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/procps/+bug/50093/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs