Hiya, thanks for the replies, very useful and has given me some food for thought on a few things.

 

Used rkhunter which is fine apart from one app out of date which I've now updated, chkrootkit its clear but chkproc gives a couple of processes not in readdir output, but they correspond to apps we are running when I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).

 

 

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?

 

I.e currently load is 1.98

 

procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in    cs us sy id wa
 0  0    624  34652  66608 1059564    0    0     1     9    0     0  3  1 96  0
 0  0    624  34436  66608 1059564    0    0     0    39 1207  2534  1  1 97  0
 0  0    624  34268  66608 1059564    0    0     0    42 1202  2412  1  1 98  0
 0  0    624  34140  66608 1059564    0    0     0    33 1197  2427  1  1 98  0
 0  0    624  34140  66608 1059564    0    0     0     0 1196  2427  1  1 98  0
 0  0    624  34188  66608 1059632    0    0     0    37 1205  2545  2  1 97  0
 1  0    624  34196  66608 1059632    0    0     0     0 1197  2392  1  1 98  0
 0  0    624  34444  66608 1059632    0    0     0    33 1200  2430  1  1 98  0
 0  0    624  34260  66608 1059632    0    0     0     0 1198  2441  1  1 98  0
 0  0    624  34132  66608 1059632    0    0     0    37 1210  2592  1  1 97  0
 0  0    624  34204  66608 1059632    0    0     0    34 1207  2502  1  1 98  0
 0  0    624  34268  66608 1059632    0    0     0    33 1201  2433  1  1 98  0

Cheers, Ian
 

On 6/21/06, Chris Mauritz <chrism@imntv.com> wrote:

Ian mu wrote:
> Hiya,
>
> Currently running Centos 4.2 x86_64 dist on a dual 3G xeon, 2G ram,
> scsi setupand everythings been running fine on it for some time. Then
> at 4am last night something kicked in (have mrtg running monitoring
> when) and since then its been running a load of about 1.5 (normally
> around 0.4). CPU usage is Cpu(s):  1.1% us,  0.6% sy,  0.0% ni, 97.9%
> id,  0.2% wa,  0.1% hi,  0.1% si.
>
> Can't see any new processes that would cause the load, just wondering
> is there any way to try and track down whats actually causing this?
> It's not excessive load, but want to add some new services and wary
> now, its something that seems wrong given the sudden increase at 4am
> (think thats when some o.s housekeeping tasks are normally scheduled,
> but there's none running that I can see that started today).
>
> Just hoping someone may have some tips on checking whats always
> waiting or how to isolate whats happening. As said, ps -ef shows no
> new processes, and cpu usage is very low.
>

Have you been up to date with patches?  Have you tried running rkhunter
and chkrootkit to see if you've been burgled?  One of the first things a
rootkit does is replace things like ps so it's processes become "invisible."

Cheers,

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