#debian

17 October 2007

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--- Log opened Wed Oct 17 00:00:04 2007
--- Day changed Wed Oct 17 2007
00:00 <****> Can anybody name me a good tool to measure temperatures?
00:00 <****> deriaN: a thermometer or a thermocouple
00:00 <****> how do yo use the mouse in debian without any gui?
00:00 <****> Thermometer
00:00 <****> i remember there was some way in gentoo but i dnt rememebr what it was called
00:00 <****> What's a Thermocouple?
00:00 <****> where you can copy text with the mouse
00:00 <****> Atalanta: gpm
00:00 <****> Atalanta: gpm
00:00 <****> thanks
00:00 <****> apg-get?
00:01 <****> Atalanta: as always
00:01 <****> thanks guys
00:01 <****> dondelelcaro Could you name a good thermometer ^_^?
00:01 <****> deriaN: depends on what you want to measure
00:02 <****> a good thermometer for measuring things from 0-100C isn't going to be good for measuring things at 0.5K or 4000C
00:02 <****> CPU / harddisk temperature
00:02 <****> 0-100C
00:02 <****> deriaN: oh, your system probably has one built in; just use lmsensors and smartmon
00:03 <****> I would get one with 20°C to 100°C if it comes with more precision.
00:03 <****> Could'nt find either of the "smartmon" - "lmsensors" packages dondelelcaro
00:04 <****> All who have heard of Google, raise your hand!
00:04 <****> deriaN: smartmon is in the smartmontools package, and its lm-sensors
00:04 * Polarina raises her hand.
00:04 <****> !tell deriaN -about search
00:06 * dutchfish discovered this accedently yesterday: http://www.google.com/linux
00:07 <****> For some reason my dovecot and imap-login processes are taking up loads of CPU time and slowing the machine down
00:07 <****> There's no open IMAP connections and restarting has no effect
00:07 <****> What could be wrong?
00:07 <****> solemnwarning: strace them
00:07 <****> solemnwarning: or look at the logs
00:07 <****> Logs are no help
00:08 * Polarina kicks solemnwarning out of #debian for refusing to believe the truth.
00:08 <****> :P
00:08 <****> Ok
00:08 <****> They seem to be making tons of calls to poll() and gettimeofday() in surges
00:09 <****> Now we know what is slowing the machine down. But why?
00:09 <****> netstat -alt doesn't show any IMAP connections
00:09 <****> solemnwarning: that's normal; they're listening for an event on a FD.
00:10 <****> solemnwarning: how much cpu time are we talking about here? how do you know they're taking an inordinate amount?
00:10 <****> dondelelcaro: 3 processes spamming poll() and gettimeofday() in surges is not normal
00:10 <****> dondelelcaro: Top shows them as taking up a high CPU %
00:10 <****> solemnwarning: they should be calling poll relatively frequently, actually
00:10 <****> Enough to make my irssi session laggy?
00:11 <****> solemnwarning: how much cpu are they using? what happens when you stop them?
00:11 <****>' and see if that helps.
00:11 <****> why poll? there's inotif?
00:11 <****> why poll? there's inotify?
00:11 <****> odd
00:11 <****> They just stopped spamming poll()/gettimeofday()
00:11 <****> or am I misunderstanding this?
00:12 <****> hello
00:12 <****> valdyn: inotify isn't particularly portable
00:12 <****> dondelelcaro: true, but some imap servers support it anyway
00:12 <****> I got a "update your shutdown utility" on halt, with a link to the ATA page. I am running debian/sid. Any idea what I have to do ?
00:12 <****> valdyn: oh, it could be, but the difference between the two shouldn't be really noticeable
00:13 * solemnwarning wonders why dovecot did that
00:13 <****> what version of dovecot?
00:13 <****> There's nothing from dovecot in the logs except shutdown/start
00:13 <****> 1.0rc15
00:14 <****> well, they have to call poll repeatedly if they want to handle requests of the other children or logins, and they should be doing it about once a second
00:15 <****> dondelelcaro: It was much faster then that
00:15 <****> Once a second wouldn't slow a machine down
00:15 <****> solemnwarning: did you have a time 'jump' ?
00:15 <****> solemnwarning, i gues you are aware if this one: https://ucsb.edu/pipermail/security-linux/2007-August/003387.html
00:15 <****> valdyn: No idea
00:15 <****> Xen clocks are unstable
00:16 <****> But I sync hourly
00:16 <****> solemnwarning: sync how?
00:16 <****> ntpdate
00:16 <****> solemnwarning: use ntpd
00:16 <****> solemnwarning: it'd have to be doing it thousands or millions of times a second to really make much of a difference, and even then it couldn't run it faster than poll would return in any event.
00:16 <****> But this started a while after the sync
00:16 <****> solemnwarning: ntpdate is dangerous for other things too
00:17 <****> ntpdate is dangerous? o_O
00:17 <****> sure
00:17 <****> not really
00:17 <****> there are things that are badly implemented which can't handle time jumps
00:17 <****> How would ntpd be any differant?
00:18 <****> Hopefully someone can help me with this: I have an old computer that I want to use as a development server but the USB ports are broken. I already have debian 4.0 on there and was wonder if there was a way through SSH (which I have running) to return debian to a base install (remove any packages with the exception of ssh) that didn't come with the base install
00:18 <****> solemnwarning: it slews the time wherever possible
00:18 <****> So I should run ntpd instead of an hourly ntpdate from cron?
00:18 <****> certainly
00:19 <****> or is there anyway to do a netinstall over ssh
00:19 <****> !ssh install
00:19 <****> ssh install is, like, http://d-i.alioth.debian.org/manual/en.i386/ch06s03.html#di-miscellaneous, or http://www.underhanded.org/papers/debian-conversion/remotedeb.html
00:19 <****> I'm guessing ntpd is the ntp package?
00:19 <****> acabrera_: just mark everything that you don't know about as automatically installed in aptitude
00:19 <****> !set the time
00:19 <****> To set the time in debian, use date --set. The truly enlightened user, however, will install ntp and adjtimex to have their clock set automatically on reboot and slewed to match time servers. You may also need to run tzconfig (sarge, etch), dpkg-reconfigure tzdata (lenny, sid), and make sure you have the right UTC setting in /etc/default/rcS first.
00:19 <****> !set the time
00:19 <****> To set the time in debian, use date --set. The truly enlightened user, however, will install ntp and adjtimex to have their clock set automatically on reboot and slewed to match time servers. You may also need to run tzconfig (sarge, etch), dpkg-reconfigure tzdata (lenny, sid), and make sure you have the right UTC setting in /etc/default/rcS first.
00:19 <****> dpkg - thanks
00:25 <****> hi there
00:26 <****> /proc/sys/kernel/sysrq" is this setting stay alive after reboot or not ?
00:26 <****> sputn1ck: no
00:26 <****> sputn1ck: you should edit /etc/sysctl.conf
00:26 <****> ok thanks

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