Video: Dab tsi yog kev siv yeeb nkab cim hauv Unix?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Cov Yeeb yog ib qho lus txib hauv Linux uas tso cai rau koj siv ob los yog ntau tshaj commands xws li cov zis ntawm ib commandserves input mus rau tom ntej. Nyob rau hauv luv luv, qhov tso zis ntawm txhua tus txheej txheem ncaj qha raws li kev nkag mus rau tom ntej xws li a cov kav dej . Cov cim '|' npe a cev.
Tom qab ntawd, siv cov yeeb nkab hais kom ua hauv Unix yog dab tsi?
A cev yog ib daim ntawv ntawm redirection (hloov ntawm cov zis tawm mus rau lwm qhov chaw) uas yog siv hauv Linux thiab lwm yam Unix -zoo li operating systems xa cov zis ntawm ib qho lus txib /program/process rau lwm tus lus txib /program/process rau kev ua ntxiv.
Tsis tas li ntawd, lim hauv Unix nrog piv txwv yog dab tsi? Feem ntau Unix lim cov kev pab cuam yog: miv, txiav, grep, taub hau, txheeb, uniq, thiab tail. Cov kev pab cuam xws li awk thiab sed tuaj yeem siv los tsim kom muaj qhov nyuaj lim vim lawv yog fullyprogrammable.
Qhov thib ob, lub hom phiaj ntawm cov yeeb nkab ua yeeb yam hauv kab hais kom ua yog dab tsi?
Nws yog nyob rau ntawm lub backslash tus cwj pwm onU. S. keyboards. Cov ntsug bar cim yog siv torepresent a cev hauv lus txib hauv Linux thiab lwm yam kev ua haujlwm zoo li Unix. A cev yog ib daim ntawv ntawm redirection uas yog siv los xa cov zis ntawm ib qhov kev pab cuam mus rau lwm qhov kev pab cuam rau kev ua ntxiv.
Cov kav dej hauv awk yog dab tsi?
5 Teb. Lub kaw lus muaj nuj nqi tso cai rau tus neeg siv los ua haujlwm cov lus txib thiab rov qab mus rau qhov awk qhov kev pab cuam. Lub kaw lus muaj nuj nqi executes cov lus txib muab los ntawm txoj hlua hais kom ua. Nws rov qab, raws li nws tus nqi, cov xwm txheej rov qab los ntawm cov lus txib uas raug tua.
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