$? -Isimo sokuphuma somyalo wokugcina owenziwe. $0 -Igama lefayela lombhalo wamanje. $# -Inani lama-agumenti anikezwe iskripthi. $$ -Inombolo yenqubo yegobolondo lamanje. Ngemibhalo yegobolondo, lena i-ID yenqubo abasebenzisa ngaphansi kwayo.
Yenzani i-$? Kusho ukuthini ku-Unix?
$? = umyalo wokugcina ube yimpumelelo. Impendulo ithi 0 okusho ukuthi 'yebo'.
Yini i-echo $? Ku-Linux?
echo $? izobuyisela isimo sokuphuma somyalo wokugcina. … Imiyalo ekuphumeni okuyimpumelelo okunesimo sokuphuma esingu-0 (cishe). Umyalo wokugcina unikeze okukhiphayo okungu-0 njengoba i-echo $v kulayini odlule iphelile ngaphandle kwephutha. Uma ukhipha imiyalo. v=4 i-echo $v echo $?
Yini i-variable $? Bonisa?
I-$? okuguquguqukayo kumelela isimo sokuphuma somyalo odlule. Isimo sokuphuma siyinani lenombolo elibuyiswa yiwo wonke umyalo lapho uqedwa. … Isibonelo, eminye imiyalo ihlukanisa phakathi kwezinhlobo zamaphutha futhi izobuyisela amanani ahlukahlukene okuphuma kuye ngohlobo oluthile lokwehluleka.
Iyini i-$3 kuskripthi segobolondo?
Incazelo: Inqubo yengane iyinqubo engaphansi eyethulwe enye inqubo, umzali wayo. Imingcele yesikhundla. Izimpikiswano zidluliselwe kuskripthi kusukela kumugqa womyalo [1] : $0, $1, $2, $3 . . . $0 igama lombhalo ngokwawo, $1 ingxabano yokuqala, $2 eyesibili, $3 eyesithathu, njalonjalo.
Kungani sisebenzisa i-Unix?
I-Unix iyisistimu yokusebenza. Isekela imisebenzi eminingi kanye nokusebenza kwabasebenzisi abaningi. I-Unix isetshenziswa kakhulu kuzo zonke izinhlobo zezinhlelo zekhompuyutha ezifana nedeskithophu, ilaptop, namaseva. Ku-Unix, kune-Graphical interface yomsebenzisi efana namawindi asekela ukuzulazula okulula nendawo esekelayo.
Lubizwa ngani uphawu ku-Unix?
Ngakho, ku-Unix, ayikho incazelo ekhethekile. Inkanyezi iwuhlamvu "olwesabekayo" kumagobolondo e-Unix futhi iyi-wildcard yanoma iyiphi inombolo yezinhlamvu (okuhlanganisa uziro). ? omunye uhlamvu oluvamile lwe-globbing, olufana ncamashi noyedwa wanoma yimuphi umlingisi. *.
Isho ukuthini i-echo?
(Ukungena 1 kokungu-4) 1a : ukuphindaphinda komsindo okubangelwa ukuvezwa kwamagagasi omsindo. b: umsindo ngenxa yalokho kuzindla. 2a : impinda noma ukulingisa omunye : ukuzindla.
Liyini igobolondo le-$0?
$0 Inweba egameni legobolondo noma iskripthi segobolondo. Lokhu kusethwe ekuqalisweni kwegobolondo. Uma i-Bash icelwa ngefayela lemiyalo (bona Isigaba 3.8 [Izikripthi Zeshell], ikhasi 39), i-$0 isethwe egameni lalelo fayela.
Ngiyisebenzisa kanjani i-Linux?
Imiyalo ye-Linux
- pwd - Uma uqala ukuvula i-terminal, usuke usohlwini lwasekhaya lomsebenzisi wakho. …
- ls - Sebenzisa umyalo othi "ls" ukuze wazi ukuthi yimaphi amafayela kuhla lwemibhalo okulo. …
- cd - Sebenzisa umyalo "cd" ukuya kuhla lwemibhalo. …
- mkdir & rmdir — Sebenzisa umyalo we-mkdir lapho udinga ukwakha ifolda noma uhla lwemibhalo.
21 Mashi 2018 g.
Ukudala kanjani okuguquguqukayo ku-Linux?
Izinguquko 101
Ukuze udale okuguquguqukayo, uvele unikeze igama nenani lakho. Amagama akho aguquguqukayo kufanele abe achazayo futhi akukhumbuze ngenani analo. Igama eliguquguqukayo alikwazi ukuqala ngenombolo, futhi alikwazi ukuqukatha izikhala. Nokho, ingaqala nge-underscore.
Iyini i-$1 kuskripthi se-bash?
I-$1 iyimpikiswano yokuqala yomugqa womyalo odluliselwe kuskripthi segobolondo. Futhi, yazi njengamapharamitha esikhundla. … $0 igama lombhalo ngokwawo (script.sh) $1 iyimpikiswano yokuqala (igama lefayela1) $2 impikiswano yesibili (dir1)
Iyini i-Echo $1?
$1 impikiswano ephasisiwe yeskripthi segobolondo. Ake sithi, usebenzisa ./myscript.sh sawubona 123. bese. $1 izoba sawubona. I-$2 izoba yi-123.
Yini i-echo $0 Unix?
Uma ukuphuma komyalo we-echo $0 kungu-bash kusho ukuthi i-bash ifakwe njengegobolondo lokungena. Uma okukhiphayo kungu-bash kuphela, kusho ukuthi ukugobolondo elingangeni ngemvume. I-man bash ithi ndawana thize kulayini we-126: Igobolondo lokungena yilelo uhlamvu lwakhe lokuqala lwe-agumenti enguziro engu-, noma oluqale ngenketho ethi -login.