Abatoranya muri CSS barashobora kudufasha byoroshye kongeramo uburyo bukenewe mubintu byagenwe. Iyi ngingo izasubiza mu buryo burambuye abatoranijwe batatu ": nth-umwana", ": umwana-wambere" na ": ubwambere-bwubwoko" Itandukaniro .

JavaScript ni ururimi rwose ruzakoreshwa mugutezimbere urubuga.Iyi ngingo isobanura mu buryo burambuye uburyo bwo kubona umubare nyawo wumurongo wa kode iriho mugihe cyo gukora.

JavaScript ni ururimi rwose ruzakoreshwa mugutezimbere urubuga, murirwo rudafite ishingiro kandi rudasobanutse dukunze guhura natwe.Iyi ngingo isobanura ibiranga byombi muburyo burambuye.

Iyo setInterval ikora inyuma yinyuma ya mushakisha, intera ntoya ya trigger izahindurwa ku gahato kugeza kuri milisegonda 1000, kandi izahagarara nyuma yo gukora mugihe runaka. Iyi ngingo isobanura uburyo bwo gukemura iki kibazo.

Umwanya udahagije wa disiki kuri Linux mubisanzwe uterwa namadosiye arenze urugero. Ariko akenshi ntituzi aho dosiye zinjira zibitswe. Kuri iyi ngingo, dukeneye kureba ubunini bwububiko bwa layer kugirango tubone aho dosiye iherereye. Iyi ngingo itangiza itegeko kuri Linux kugirango urebe ingano ya dosiye yububiko.

Mugihe cyo gukora no gushiraho Redis5 kuri CentOS7, habaye ikosa jemalloc.h idashobora kuboneka. Iyi ngingo isobanura uburyo bwo kugikemura.

Mugihe cyo gukusanya no gushiraho Python3, habaye ikosa mumutwe. Iyi ngingo isobanura uburyo bwo kugikemura.

Iyo twanditse code, burigihe habaho amakosa kenshi ahantu hamwe, kandi aya makosa ntashobora kwirindwa kandi arashobora kwirengagizwa.Muri iki gihe, turashobora gukoresha ikosa rya PHP ikumira kugirango duhagarike amakosa.

Gukoresha YUM mugushiraho software biroroshye cyane kuruta gukora no gushiraho. Ariko niba seriveri yacu idafite IP rusange murusobe rwimbere, dukeneye guhuza imiyoboro rusange binyuze muri seriveri ya porokisi. Iyi ngingo isobanura uburyo bwo gushiraho porokisi ya SOCKS5 ya YUM.

Apache ni software ikoreshwa cyane kurubuga rwa seriveri. Irashobora gukora kumurongo hafi ya mudasobwa ikoreshwa cyane.Kubera urubuga rwambukiranya umutekano hamwe numutekano ukoreshwa cyane, ni imwe muma software azwi cyane kurubuga rwa seriveri. Iyi ngingo isobanura mu buryo burambuye uburyo washyira Apache kuri CentOS7.

.NET ni urubuga rwiterambere rwa Microsoft, kuko rushobora gukora kuri Windows gusa muminsi yambere, rufite aho rugarukira. Ariko ibishya .NET Core isanzwe ishyigikira gukora kuri Linux. Iyi ngingo isobanura mu buryo burambuye uburyo bwo kwishyiriraho .NET Core kuri CentOS7.

MySQL nikintu gikunze gukoreshwa gifungura isoko yububiko. MySQL8 irakomeye kandi yongerewe umutekano kuruta verisiyo yabanjirije. Mugihe kimwe, MySQL8 nayo yakoze optimizasiyo nyinshi mumikorere. Iyi ngingo isobanura mu buryo burambuye uburyo bwo kwinjiza no kugena MySQL8 kuri CentOS7.

SVN ni impfunyapfunyo yo gukuraho, sisitemu yo gufungura verisiyo yo kugenzura. Mubisanzwe bikoreshwa kubantu benshi kugirango bafatanyirize hamwe umushinga umwe, kugirango bagere kumutungo basangiye, kandi amaherezo ubuyobozi bukomatanyije. Iyi ngingo isobanura birambuye uburyo washyira serivise ya SVN kuri CentOS7.

MariaDB ni ishami rya MySQL.Ikoreshwa ryayo ahanini ni kimwe na MySQL, ariko ishyigikira amahuriro menshi-yakira, atandukanye na master-imbata ya MySQL. Iyi ngingo isobanura mu buryo burambuye uburyo washyira MariaDB 10.4 kuri CentOS7.

Niba dukeneye kongeramo no gukuramo amatariki nibihe muri MySQL, turashobora gukoresha: DATE_ADD, DATE_SUB, ADDDATE, SUBDATE. Iyi ngingo isobanura imikoreshereze yiyi mirimo muburyo burambuye.

Mubisanzwe dukeneye gufata amakosa yisi yose muri PHP hanyuma tukandika inyandiko, kugirango tubashe kubona ibibazo bishoboka muri gahunda mugihe. Ariko tumaze gushiraho ikosa ryo guhamagara imikorere hamwe na set_error_handler, ntidushobora gufata amakosa yo murwego rwa FATAL. Iyi ngingo isobanura uburyo bwo gufata amakosa yo murwego rwa FATAL yakozwe mugihe cya PHP.

EMQX ni seriveri yuzuye ya MQTT.Iyi ngingo isobanura uburyo bwo gukora kode yemewe yo guhamagara API ya EMQX.

EMQX ni seriveri nziza ya MQTT.Iyi ngingo isobanura uburyo wakoresha kode yawe kugirango ugenzure uburenganzira mugihe abakiriya bajijutse bahuza serivisi kandi biyandikisha kugirango batangaze ingingo.

EMQX nubutumwa bwiza bwa MQTT seriveri. Ihuriro ryayo rishyigikira miriyoni mirongo zihuza kandi rifite uburyo bworoshye bwo kwagura. Iyi ngingo isobanura mu buryo burambuye uburyo washyira EMQX kuri CentOS7.

Redis nisoko nziza ifunguye ikwirakwizwa rya sisitemu. Iyi ngingo isobanura mu buryo burambuye uburyo washyira Redis kuri CentOS7.