Yesterday, I opened a "screen" and try to update and upgrade the distro via "apt-get update" and "apt-get upgrade". I left it open, and when I opened the detached screen, I see a window that told me to reboot the system as soon as possible. Imagine that if it was an important server, this reboot was a horrible work. But hopefully, this was only a Computer Engineering Department shell server ;)I restarted it, but when it booted, the LDAP users couldn't login any more. After lots of investigation, I found that I must change the /etc/nsswitch.conf and /etc/libnss-ldap.conf and /etc/ldap/ldap.conf to their previous settings! I don't know why Debian change my configuration file. I didn't expect this work from Debian security team.
Fortunately , the server is now OK. I've an I idea about upgrading the old FreeBSD machine in the Department to a new one (FreeBSD 6.3). I think FreeBSD is great. Debian is for lazy administrators and I don't wanna be a lazy admin ;)
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