A while back a co-worker asked me why SSH (sometimes) uses a secondtemporary host key in addition to the main host key. I had to thinkabout it for a bit: it's to keep the session private even if theserver's host key is later compromised.

(The clever person will notice I could have found this out just byreading the description of the KeyRegenerationInterval sshd parameter.I observe that one rarely pauses to grovel through manpages whendiscussing half-remembered things with co-

Python's indentation rules apply only to logicallines (as the documentation is careful to spell out), although theindentation level only comes from the first physical line. This opens upvarious sorts of peculiarity and evil, some of which I mentioned lasttime .

There are two ways for multiple physical lines to be joinedinto one logical lines: being explicitly continued witha \ at the end of the line ( explicit line joining ), orbeing inside a ( , { , or [ ( implicit line joining )

Our SMTP frontend crashed and restarted today at 2:51pm, which meansthat some stats are a little bit distorted. This week, we:

• got 15,320 messages from 276 different IP addresses.
• handled 21,412 sessions from 1,467 different IP addresses.
• received 217,984 connections from at least 66,248 different IPaddresses up until this morning at 4am, and 11,150

# /etc/init.d/exim4 stopStopping MTA: exim4.# pidof exim43559# grep PIDFILE /etc/init.d/exim4 | sed 1qPIDFILE="/var/run/exim4/exim.pid"# ls -ld /var/run/exim4ls: /var/run/exim4: No such file or directory# mount | fgrep /var/runvarrun on /var/run type tmpfs (rw