<div>Hiya, thanks for the replies, very useful and has given me some food for thought on a few things.</div>
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<div>Used rkhunter which is fine apart from one app out of date which I've now updated, chkrootkit its clear but chkproc gives a couple of processes not in readdir output, but they correspond to apps we are running when I check in /proc/pid/cmdline so think that sides looking ok (still checking a couple of bits though).
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<div>The strange one was on the vmstat 5 suggestion, the r (waiting for runtime) column is pretty much 0, if the load is > 1 shouldn't that be mostly > 1 also, or am I misunderstanding the load definition?</div>
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<div>I.e currently load is 1.98</div>
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<div>procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----<br> r b swpd free buff cache si so bi bo in cs us sy id wa<br> 0 0 624 34652 66608 1059564 0 0 1 9 0 0 3 1 96 0
<br> 0 0 624 34436 66608 1059564 0 0 0 39 1207 2534 1 1 97 0<br> 0 0 624 34268 66608 1059564 0 0 0 42 1202 2412 1 1 98 0<br> 0 0 624 34140 66608 1059564 0 0 0 33 1197 2427 1 1 98 0
<br> 0 0 624 34140 66608 1059564 0 0 0 0 1196 2427 1 1 98 0<br> 0 0 624 34188 66608 1059632 0 0 0 37 1205 2545 2 1 97 0<br> 1 0 624 34196 66608 1059632 0 0 0 0 1197 2392 1 1 98 0
<br> 0 0 624 34444 66608 1059632 0 0 0 33 1200 2430 1 1 98 0<br> 0 0 624 34260 66608 1059632 0 0 0 0 1198 2441 1 1 98 0<br> 0 0 624 34132 66608 1059632 0 0 0 37 1210 2592 1 1 97 0
<br> 0 0 624 34204 66608 1059632 0 0 0 34 1207 2502 1 1 98 0<br> 0 0 624 34268 66608 1059632 0 0 0 33 1201 2433 1 1 98 0<br><br>Cheers, Ian<br> </div>
<div><span class="gmail_quote">On 6/21/06, <b class="gmail_sendername">Chris Mauritz</b> <<a href="mailto:chrism@imntv.com">chrism@imntv.com</a>> wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Ian mu wrote:<br>> Hiya,<br>><br>> Currently running Centos 4.2 x86_64 dist on a dual 3G xeon, 2G ram,
<br>> scsi setupand everythings been running fine on it for some time. Then<br>> at 4am last night something kicked in (have mrtg running monitoring<br>> when) and since then its been running a load of about 1.5 (normally
<br>> around 0.4). CPU usage is Cpu(s): 1.1% us, 0.6% sy, 0.0% ni, 97.9%<br>> id, 0.2% wa, 0.1% hi, 0.1% si.<br>><br>> Can't see any new processes that would cause the load, just wondering<br>> is there any way to try and track down whats actually causing this?
<br>> It's not excessive load, but want to add some new services and wary<br>> now, its something that seems wrong given the sudden increase at 4am<br>> (think thats when some o.s housekeeping tasks are normally scheduled,
<br>> but there's none running that I can see that started today).<br>><br>> Just hoping someone may have some tips on checking whats always<br>> waiting or how to isolate whats happening. As said, ps -ef shows no
<br>> new processes, and cpu usage is very low.<br>><br><br>Have you been up to date with patches? Have you tried running rkhunter<br>and chkrootkit to see if you've been burgled? One of the first things a<br>rootkit does is replace things like ps so it's processes become "invisible."
<br><br>Cheers,<br><br>_______________________________________________<br>CentOS mailing list<br><a href="mailto:CentOS@centos.org">CentOS@centos.org</a><br><a href="http://lists.centos.org/mailman/listinfo/centos">http://lists.centos.org/mailman/listinfo/centos
</a><br></blockquote></div><br>