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1、Linux系统巡检常用命令CommoncommandsforLinuxsystempollingLinuxserverLinuxsystemrequiresregularvisittochecktheserverhardwareandsoftwareusage,amountstoaperson，sphysical,ensurethatcanfindandsolveproblemsintime,reduceloss,thecommonlyusedinspectioncommandisasfollows:#uname-a#check
2、sthekerne1/operatingsystem/CPUinformation#cat/etc/issue#toviewtheoperatingsystemversion#cat/proc/cpuinfo#toviewCPUinformationTheidoftheprocessorlogicprocessor・Physicalidphysicalencapsulatedprocessor，sid.Coreidforeachcoreid.CPUcoresareinthenumberofcoresinaprocessorwit
3、hthesamephysicalencapsulation.Thenumberoflogicalprocessorsinaprocessorthatisinthesamephysicalwrapper・Thephysicalidis0,whichmeansIhaveonlyonephysicalprocessor;Let，ssaythattheCPUis4,thephysicalidhastwo,thecoreidhas8,andthevalueofthenumberis8,andthereare16processors・Sot
4、heserverhostCPUfortwophysicalencapsulationtreatmenteachprocessorhasfourcore(CPUcores),eachCPUcorecanbedividedintotwologicalprocessors(hyper-threadingtechnology),asaresult,eachphysicalprocessorhaseightlogicalprocessors,atotalof16processor・#hostname#checksthecomputerna
5、me#lspci-tv#listsallPCIdevices#lsusb-tv#listsallUSBdevices#lsmod#liststheloadedkernelmodules#env#checksforenvironmentvariables#free-m#checksformemoryusageandswapareausage#df-h#toviewtheusageofeachpartition#du~sh#toseethesizeofthespecifieddirectory#grep
6、MemTotal/proc/meminfo#viewthetotalamountofmemory#grepMemFree/proc/meminfo#tochecktheamountofmemoryavailable#uptime#checksthesystemruntime,numberofusers,andload#cat/proc/loadavg#toviewthesystemload#mount
7、column-t#looksforthepartitionstatetobeattached#fdisk-1#viewallpa
8、rtitions#swapon-s#checksallswappartitions#hdparm-i/dev/hda#toviewthediskparameters(onlyforIDEdevices)#dmesg
9、grepIDE#checkstheIDEdevicetestwhenitstarts#ifconfig#viewthepropertiesofallnetworkinterfaces#iptables-1#forfirewallSettings#route-n#toviewtheroutingtable#netsta
10、t-lntp#checksalllisteningports#netstat-antp#checksalltheconnectionsthathavebeenestablished#netstat-s#toviewnetworkstatistics#ps-ef#
