/bin ? /sbin ??? ?? ?? ? ??? ?? ??; 2./USR ?? ??? ???? ? ?? ???; 3./etc? ?? ?? ???????. 4./var? ?? ? ??? ?? ?? ???? ?????. 5./home ? /root? ?? ??? ? ?? ???? ? ???????. 6./tmp ? /run? ?? ?? ? ??? ???? ?????. 7./dev, /proc, /sys? ?? ? ??? ?? ?????? ?????. 8./lib ? /lib64?? ??? ??? ??? ????? ??? ???? ????. 9./opt ? /srv? ?? ?? ????? ? ??? ???? ?????. FHS? ??? ? ???? ??? ?? ??? ?? ???? ???? Linux ??? ????? ???? ????? ???? ?? ??? ?? ???? ?????.
Aug 06, 2025 pm 04:23 PMjavaflightrecorder (jfr) ? javamissioncontrol (jmc) arebuilt-injdktoolsforprofingjavaapplicationswithminimaloverhead.1.jfrcollectSruntimedatasuchasgarbageCollection, ThreadContention, cpuusage, ?? ?? ? jvmevents.enablejprateTupUteT-stx :
Aug 06, 2025 pm 04:14 PMworker_processes? CPU ?? ?? ???? ???? ?? ?? ?? ?? worker_connections? ???? ULIMIT-N? ? ?? ??? ????. 2. Linux?? Epoll ? Multi_accept? ????? I/O ??? ??????. 3. ??? I/O? ???? ?? ???? Open_File_Cache? ??????. 4. ??? ???? ??? ?? ?? ??? ????? ???? ??? ????? ?? proxy_buffer ?? ??? ??????. 5. GZIP? ??? ?? ???? ???? ?? ?? ? ?? ? ???? ?? ??????. 6. HTTP/2? SSL ?????? ????? ??? ???? ?? ? ??????. 7. AB ?? WRK? ??????
Aug 06, 2025 pm 04:06 PMinstallinxusingTheAppropriatePackagemanagerForylinuxDiptribution, startAndenAbleService, andverify infitisRunning.2.configUreThePireWalltoHttTpandhttTptPfficUsinguingworwald.3
Aug 06, 2025 pm 04:02 PMarray_splice()istheprecisetoolforremovingspecificelementsfromanarrayinPHP.1.Itmodifiestheoriginalarraybyremovingaspecifiedportionandreturnstheremovedelements.2.Usearray_splice($arr,$offset,$length)toremove$lengthelementsstartingat$offset.3.Removingfr
Aug 06, 2025 pm 03:59 PMXSTATEMAKESMANIGING ComplexUistateInjavaScriptCracticalByUsingFinitesTeMachinesandStateCharts.insteadOfScatherdBooleleanslikeIsLoadingOrisError, ItCentralizesLogicIntodeFinedStatesandtates ? aformc
Aug 06, 2025 pm 03:52 PMwhen when whenwithgeospatialdatainmysql, performancanquicklybecomeabottleneckthifthingsaren'tsetupright
Aug 06, 2025 pm 03:45 PMCorewebvitalscanbeimprovedByoptimizinglcp, fid ? clsthroughspecificstrategies : 1. improvelcpbyoptimizingserverresponsetime, preloadingcriticalresources, compressingimages, andusingefficefiedbbs.20
Aug 06, 2025 pm 03:37 PMPHP ??? ?? ???? ??? ?? ??? ???? ?? ?? ??? ??? ??? ???? ???? ?????. ?? ?? ?? ??? ?? ???? ?? ????, ?? ?? ?? ??? ??? ?? ??? ??? ???? ?? ????? ?????. 1. ?? ?? ???? ??? ?? ???? ?? ??? ???? ?? ? ? ????. 2. handlePostState ()? ?? ?? ?? ??? ??????? ?? ? ??? ?? ? ? ????. 3. ??? ??? ???? ???? ?? ? ????? ??? ??? ??????. 4. ?? ??? ??? ?? ?? ?? ???? ?? ??? ???? ?? ????. 5. ??? ??? ????? ??? ??? ?? ??? ? ?? ?? Symfo? ?? ?? ?????? ???????.
Aug 06, 2025 pm 03:26 PM?? ??? ? Corosync? ???? ?? ??? ??? Linux ????? ???? ?? ?? ?? ??? ???????. ??? ??? ??, ?? IP ? ??? ??, ?? ?? ??????? SSH, ?? ???? (??) ? ??? ??? ??? ???? ? ?? ??; 2. ? ??? ?? ????? ???? ?????? (RHEL/CENTOS ?? DNFININSTALLPACEMAKERPCS ? UBUNTU? APTINSTALLPACEMAKERCOROSYNCCCCRMSH? ???? PCSD ???? ????? HACLUST ????? ??? ????? ?????. 3. ?? ???? ??? ???? (pcsclusterauthnode1node2) ??? ????.
Aug 06, 2025 pm 03:22 PMMySQL 8.0? InvisibleIndexes? ???? ???? ?? ???? ??? ?? ? ????. 1. ?? ? ? ??? ?? ?? : CreateIndex ... Invisible; 2. ?? ???? ??? ?? ??? ?????? : AlterIndex ... Invisible; 3. ??? ?????? : AlterIndex ... ??. ??? ?? ??? ??? ????? ?? ?? ???? ???? ????. ??? ???? ??? ????? ?? ??? ??? ??? ??? ? ?????. ?? ? ??? ?? ??? ???? ForceIndex? ??? ??? ??? ???? ??? ??? ??? ? ?? ?? ? ??? ?? ??? ?????.
Aug 06, 2025 pm 03:20 PMTomigrateOlderApplicationSql8.0successly, firstCheckapplicationCompatibility, thenceRiledIndConvertData, UpdateConFigurationAndSecuritySettings ? MonitorPerformancePost-Migration.1.CheckApplicationCompatibility? ?? DatabAdernIrsupdatedDatabAdernIrs
Aug 06, 2025 pm 03:07 PMUSEARRAY_SPLICEFORIN-INSERTIONASITMODIFIESTHEORRAYDIRECTILY, ismoreferficient, andhassimplersyntax; 2.usearray_mergewithArray_slice wherepresergingHearnArrayIsRequired, asitCreateSanewArrayWithoutWithoutWithoutalSty
Aug 06, 2025 pm 03:06 PMQuarkusiSakubernetes-nativeJavaframeworkstartup, lowmemoryusage ? seamlesscontainerintegration .1.itsupportslivecodingwithinstreloadvia./mvnwquarkus : dev.2.itaunifificationconfigurationmodphoughoupppl
Aug 06, 2025 pm 03:01 PMwhenullcoalescingoperator (??) inphpsafelyaccessesarraykeyswithtriggeringnotices.1.itreturnsthevalueifthekeyexistsandisnotnull; ??? ???, itreturnsadefault.2.itsimplifiesfalllogiccomparedtoisset () andlenaryChecks.
Aug 06, 2025 pm 02:48 PM?? $ \ _ serverValuesAsUntrustediftheyCanCannfluencedByUserInput, suchashttp \ _host, request \ _uri, http \ _user \ _agent, http \ _referer , andQuery \ _string, sincethesecanbemanipulatedByclients.2.alwayseScape $ \ _ ServerDataUsingHtmlSpecialchars ($ \ _ Server [ 'value'], Ent
Aug 06, 2025 pm 02:45 PMDestructuringAllowsTectiveExtractionOfArrayElementsIntOvariables.2.thefind () MethodRetReievestHevErieVeStelementMatchingAcondition, whilefindIndex () ReturnsIndex, ? ? FofferingsAferandmoreReadableAltivesto
Aug 06, 2025 pm 02:38 PM???? ???? ???? UEFI ???? Windows 11? ???? ?? ???? ?? Ubuntu ?? ??? ????? ??????. 2. ??? ?? ??? ?? C ????? 50GB ??? ???? ?? ??? ?????. 3. Rufus? ???? Ubuntu ISO? 8GB ?? USB ???? ???? GPT ? UEFI ??? ??????. 4. Windows?? ?? ??? ?? SecureBoot? ??? ????????. 5. UEFIUSB?? ???? "WindowsBootManager? ?? Ubuntu Parallel ??"??? ???? ???? ? ??? ??????. 6. ?? ? ???, Grub ??? Windows? Windows? ???? ??? Ubuntu? ???? SudoupDate-? ??????.
Aug 06, 2025 pm 02:35 PM??? ??? ()? ???? PHP? ?? ??? ??? ??????. 1. ???? ? ?? ???? ?? -1, 0 ?? 1? ????, ?? ?? ????? ??? ?????? ??? ??? ?? ?????. 2. USORT, UASORT ? UKSORT?? ?? $ B? ???? ????? ??????. 3. ?? ?? ??? [$ a [ 'field1'], $ a [ 'field2']] [$ b [ 'field1'], $ b [ 'field2']]]? ?? ?? ? ? ????. 4. ?? ?? ? $ b [ 'age'] $ a [ 'age']? ?? ???? ??? ???????. 5. ?? ?? ??? $ a-> age $? ?? ?????.
Aug 06, 2025 pm 02:28 PMSQL? ?? ?? ? ?? ???? ????? ???? ? ????. 1. ?? ??? ?? ? ?? ?? ?? (? : ??)? ?? ?? ? ?? ?? ????, ?? ? ???? ????, ?? ?? ???? ????? ? ?? ??? ????. 2. ?? ??? (?? ??/?? ??)? ???? ???? ?? ??? ?????? (??? ?? ? ?? 3 ?? ?? ?? ??). 3. ??? ???? ?? ??? ???? ?? ??? ???? ?? ??? ????. 4. ??? ??? ?? ?? ? ?? ???? ???? ?? ??? ???? ??? ?? ???? ???????. ??? ??? ????? SQL? ???? ?? ???? ??? ???? ?? ? ? ????.
Aug 06, 2025 pm 02:23 PMBreakexitsTheloopimmed SeeforFindingAtArget, ????? THEFIRSTMATCH.2.ContInuesKIPSTheCurrentitation, ??? ortipilteringItemSliketemporaryFiles.3.gotoJumpStoalabeledStatement, ?? ??? ?? ?? ? ?? ???
Aug 06, 2025 pm 02:14 PMwestirectKeyAssignmentMentForo (1) ???? .2.CheckKeyExistenceonlyWhenCessaryAvoidOverHead
Aug 06, 2025 pm 02:13 PM?? ??? ??? ???? ?? ????? ????????. 2. ?? ????? ???? ??? Goroutine ?? Server? ?? ?? ?? ?????? ??? ??????. 3. ??? ???? ?????, ?? ?? ??? ???? ?? ?? ?? ? ?? ?????. 4. ?? ???? ?? ?? ??, Debug.stack ()? ???? ?? ??? ?? ??? ???? ???? ?? ?????. ??? ?? ???? ???? ??? ?? ????? ? ???????. ??? ? ??? ??? ? ????. ??, ??? ?? ?? ??? ???? ???????.
Aug 06, 2025 pm 02:08 PM?? ?? ???? ?? ?? ???? ??? ?? ? ? ?? ??? ???? ??? SCINTYSESSIONS? ?????. 1. ??? ??? ???? ??? ???? ???? ???? ???? ???? ?????. 2. ?? ??? ???? ???? ??? ??? ??? ??????. 3. IP_HASH? ???? ????? ?? ??? ?? ??? ??????. ??? ??? ????? ???????? ?? ????. ??? ?? ???? ????? ?? ???? REDIS? ??? ???????.
Aug 06, 2025 pm 02:04 PMTouseEregexInsublimeText'SfindAndReplace, FirstEnableGexGexByOpeningTheFindPanelwithCtrl f (Windows/Linux) Orcmd F (MACOS), Clicking The.Button, OrusingAlt r (Windows/Linux) ORUSING R (MACOS) .NEXT, ApplicBasicPatterns \ D Fordigits, \ b \ w {5} \ bfor5-retterwords
Aug 06, 2025 pm 01:58 PMLSMOD??? ? ??? ???? Insmod? ??? ?? ????? ???? ???? ??? ModProbe? ??????? ? ???? ?????. 1. LSMOD? ???? ???? ? ?? ? ? ????????. 2. Insmod./mymodule.ko? ???? ?? ??? ???????? ???? ?????? ??????. 3. ModProbeUSB_Storage? ???? ??? ???????? ??? ???? ModProbe-Rusb_storage? ??????????. ?? ???? ModProbe? ???? Insmod? ???? ??? ?? ????? LSMOD? ?? ??? ?????? DepMod-A? ??? ??????? ?????? ModinFO?? ?? ??? ? ? ????.
Aug 06, 2025 pm 01:48 PM???? ?? ??? ?? ??? ??????. ???? ?? ??? ???? Redis ?? Hazelcast? ?? ???? ?????. 2. ???? ???? ??? ?? ??? ???? ?? ? ?? ??? ???? GET ???? ?? ???? ??????????. 3. SpringBoot? @enablecaching ? @Cachable ??? ???? ??? ??? ???? ??? ??????. 4. ?? ?? ?? ??? ?? ??, ???? TTL? ???? Cachey Breakdown? ??? ?? CrophrympterWrite? ??????. 5. ??? ? ?? ??? ?? ???? ???? ?? ??? ?????? ????? ???? ??? ?? ??? ??????.
Aug 06, 2025 pm 01:45 PMthetransientkewordinjavaexcludesfieldsfieldsfieldsfieldsfieldsfieldsfieldsfieldsfoludeSfieldsfordsfordsfrombeingsaved; 2) ithandlesnon-serializableobjectssuchasthreadorsocket; 3) itimprovesperformancebyskippinguncessarydata; 4) Dranserients
Aug 06, 2025 pm 01:39 PM? ???? ???? ?? ? ? ??? ?? ?? ????? ?? ??? ?? ?? ??? ? ?? ??, ?? ?? ? ??? ?????? ???? ?? ????. ?? ???? ??? ?????. 1. ASP.NETCORE? ModelBinder, SpringBoot? @requestbody, Django? Modelform ?? ?? ??? ??? ?? ?? ??? ???? ???? ?? ? ?? ??? ?????. 2. ???? ?? ???? ????, ?? ????? ???, ??? ??? ????? (? : express?? req.body? ??? ??? ???? ?); 3. ?? ?? ??? ?? ??? ???? ?? ??? ???? DTO? ???? ??? ???? ?? ????.
Aug 06, 2025 pm 01:19 PMLinux ?? ??? ???? ?? ???? ???? ??? ?? ? ?? ??? ???? ? ?????. 1. ?? ??? ?? ? 4, 2 ? 1? ???? read (r), write (w) ? execute (x)? ????. 2. ?? ??? ??? (U), ?? (g) ? ?? (O)? ????. 3. LS-L? ???? ????? CHMOD? ?? ?? (? : U x) ?? ??? ?? (? : 755)? ?? ??? ?????. 4. Chown? CHGRP? ???? ?? ??? ???? ? ???? ????? ?? ??? ?????. 5. ?? ???? SUID (??? ???? ?? ???? ??), SGID (?????? ?? ?? ?? ?? ???? ??) ? ??? ?? (??? ??, ??? ?
Aug 06, 2025 pm 12:56 PM