DBdhcp是什么

HowtoconfiguretheISCDHCPservertoleaseIPaddresstoSkyPilotdevicesStep1:Editingdhcpd.
confusingvieditor.
a)type"vi/etc/dhcpd.
conf"toeditthedhcpd.
confb)IfyouarenotfamiliarVI,pleaselookbelowforreferencetoVIbasiccommands:ForStep2–6lookatexampleDHCPconfigStep2:changeserver-name"192.
168.
5.
4"toreflecttheserverIPaddress.
ddns-update-stylead-hoc;default-lease-time172800;max-lease-time345600;server-name"192.
168.
5.
4";IPaddressoftheEMSandDHCPserveromapi-port7911;authoritative;Step3:addyourownnetworkIPaddress,subnetmask,broadcast-address,router,ftp,andskypilotEMSserverIPaddress.
shared-networkSkyPilot{subnet192.
168.
5.
0netmask255.
255.
255.
0{SubnetfortheSkyPilotdevicesoptionsubnet-mask255.
255.
255.
0;subnetmaskoptionbroadcast-address192.
168.
5.
255;broadcastaddressforthesubnetoptionrouters192.
168.
5.
1;therouterIPaddressoptiontftp-server-name"192.
168.
5.
4";FTPserverthatSkyPilotnodeswilldownloadimagesfromoptionwww-server192.
168.
5.
4;IPaddressofserverthatSkyPilotnodesdownloadconfigurationfilefromStep4:Addspecificnode(SkyGateway,SkyExtender,andSkyConnector)information.
a)addhost,hardwareEthernet,fixed-address,andoptionhost-nameforeachentryhostGateway{hardwareethernet00:0a:db:01:08:a0;Macaddressofunitfixed-address192.
168.
5.
20;FixIPaddressthatwillbeassignedoptionhost-name"Gateway";Optionhostnamethatyouwanttogiveit.
}hostExt01{hardwareethernet00:0a:db:00:01:09;fixed-address192.
168.
5.
21;optionhost-name"Ext01";}hostCPE1{hardwareethernet00:0A:DB:09:52:6C;fixed-address192.
168.
5.
51;optionhost-name"CPE1";}}Step5:AddanewsubnetwithpublicIPaddressforthePCssubnet216.
15.
3.
0netmask255.
255.
255.
0{SubnetforthePCbehindtheSkyPilotDevicesrange216.
15.
3.
3216.
15.
3.
254;DHCPIPrangethatwillbedynamicallyleasetothePCoptionsubnet-mask255.
255.
255.
0;Subnetmaskoptionbroadcast-address216.
15.
3.
255;broadcastaddressoptionrouters216.
15.
3.
1;routeronwhichthePCwillgettotheinternetoptiondomain-name-servers66.
81.
32.
11,66.
81.
32.
12;DNSserver}}Step6:Makesurethatyourestartthedhcpservereverytimeyouaddentriesbyeditingthepd.
conffile.
Ifyougetanyerrors,lookatwhatlineyouarefailingatandyoucanlookoverittoeifthereisanytypos.
[OK]dhcse[root@budgetroot]#skypilot_stopdhcpdShuttingdowndhcpd:[OK][root@budgetroot]#skypilot_startdhcpdShuttingdowndhcpd:Sampledhcpd.
confddns-update-stylead-hoc;efault-lease-time172800;max-lease-time345600;68.
5.
4";authoritative;55.
255.
255.
0{k255.
255.
255.
0;optionrouters192.
168.
5.
1;2.
168.
5.
4";optionwww-server192.
168.
5.
4;}:01:09;optionhost-name"Ext01";hostCPE1{et00:0A:DB:09:52:6C;5.
255.
255.
0{.
254;optionbroadcast-address216.
15.
3.
255;ionrouters216.
15.
3.
1;optiondomain-name-servers66.
81.
32.
11,66.
81.
32.
12;dserver-name"192.
1omapi-port7911;shared-networkSkyPilot{subnet192.
168.
5.
0netmask2optionsubnet-masoptionbroadcast-address192.
168.
5.
255;optiontftp-server-name"19hostGateway{hardwareethernet00:0a:db:01:08:a0;fixed-address192.
168.
5.
20;optionhost-name"Gateway";hostExt01{hardwareethernet00:0a:db:00fixed-address192.
168.
5.
21;}hardwareethernfixed-address192.
168.
5.
51;optionhost-name"CPE1";}}Subnet216.
15.
3.
0netmask25range216.
15.
3.
3216.
15.
3optionsubnet-mask255.
255.
255.
0;opt}}ViBasic-ToGetIntoandOutOfviToStartviTousevionafile,typeinvifilename.
Ifthefilenamedfilenameexists,thenthefirstpage(oresnotexist,thenanemptyfileandscreenarecreatedinto*vifilenameeditfilenamestartingatline1screen)ofthefilewillbedisplayed;ifthefiledowhichyoumayentertext.
vi-rfilenamerecoverfilenamethatwasbeingeditedwhensystemcrashed*hitwenToExitviUsuallythenewormodifiedfileissavedwhenyouleavevi.
However,itisalsopossibletoquitviwithoutped.
Thistypeofcommandispletedbyhittingthe(or)key.
*:xquitvi,writingoutmodifiedfiletofilenamedinoriginalinvocationheneveryouar'tsurewhichmodeyouareinsavingthefile.
Note:Thecursormovestobottomofscreenwheneveracolon(:)istycom:wqquitvi,writingoutmodifiedfiletofilenamedinoriginalinvocation:qquit(orexit)vi*:q!
quitvieventhoughlatestchangeshavenotbeensavedforthisvicallMovingtheCUnlikemMacIntosheditors,themousedoesnotmovethecursorwithinthevieditorscrenw).
Youmustusethethekeycommandslistedbelow.
OnsomeUNIXplatforms,thearrowkeysmaybeusedaswell;however,sinceviwasdesignedwiththeQwertykeyboard(containingnoarrowkeys)inmind,thearrowkeyssometimesproducestrangeeffectsinviandshouldbeavoided.
ckandforthbetweenaPCenvironmentandaUNIXenvironment,youmayfindthatthisdissimilarityinmethodsforcursormovementisthemostfrustratingdifferencebetweenthetwo.
ursoranyofthePCande(orwindoIfyougobaInthetablebelow,thesymbol^beforealettermeansthatthekeyshouldbehelddownwhiletheletterkeyispressed.
*jor[ordown-arrow]movecursordownoneline*k[orup-arrow]movecursoruponeline*hor[orleft-arromovecursorleftonecharacterw]*lor[orright-arrow]movecursorrightonecharacter*0(zero)movecursortostartofcurrentline(theonewiththecursor)*$movecursortoendofcurrentlinemovecursortobeginningofnextwordwbmovecursorbacktobeginningofprecedingwordmovecursortofirstlineinfile:0or1G:nornGmovecursortolinen:$orGmovecursortolastlineinfileScreenManipuThefotvitomoveupordownseverallinesandtoberefrese.
^fmoveforwardonescreenlationllowingcommandsallowheeditorscreen(orwindow)hd^bmovebackwardonescreen^dmovedown(forward)onehalfscreen^umoveup(back)onehalfscreen^lredrawsthescreen^rredrawsthescreen,removingdeletedlinesAdding,Changing,andDeletingUnlikePCeditors,youcareplacethemouse.
Insteadusethecommandsinthefollowingtables.
Perhapsthemostimportantcommandistheonethatallowsyoutobackupandundoyourlastaction.
Unfortunately,thiscommandactslikeatoggle,undoingandredoingyourmostrecentaction.
YoucannotgoEVERYOUJUSTDID;asimpletoggleTextnnotordeletetextbyhighlightingitwithbackmorethanonestep.
*uUNDOWHATThemainpurposeofaneditoristocreate,add,ormodifytextforafile.
orAddingTextInsertingThefollowingcommvieditorintoinsertmode;thus,tEc>keymustbepressedtoterminatetheentryoftextandtoputthevieditorback*iinserttextbeforecursor,untilhitandssallowyoutoinsertandaddtext.
Eachofthesecommandsputsthehehit*aappendtextaftercursor,untilhitAappendtexttoendofcurrentline,untilhit*openoandputtextinanewlinebelowcurrentline,untilhit*Oopenandputtextinanewlineabovecurrentline,untilhit