umyalo we-echo ku-linux usetshenziselwa ukubonisa umugqa wombhalo/iyunithi yezinhlamvu edluliswa njengengxabano . Lona umyalo owakhelwe ngaphakathi osetshenziswa kakhulu kuma-shell scripts namafayela e-batch ukukhipha umbhalo wesimo esikrinini noma efayeleni.
Iyini i-echo ku-Linux?
I-Echo i Ithuluzi lomyalo le-Unix/Linux elisetshenziselwa ukubonisa imigqa yombhalo noma iyunithi yezinhlamvu edluliswa njengezimpikiswano emugqeni womyalo.. Lona omunye wemiyalo eyisisekelo ku-linux futhi evame ukusetshenziswa kakhulu kuma-shell scripts.
Kuyini ukusetshenziswa kwe-LS kanye nomyalo we-echo?
itheminali ibonisa okukhiphayo kwe-ls . igobolondo ithumba okukhiphayo $(ls) futhi yenza ukuhlukaniswa kwamagama kuyo. Nge-IFS ezenzakalelayo, lokhu kusho ukuthi zonke izigcawu zesikhala esimhlophe, kuhlanganise nezinhlamvu zomugqa omusha, zithathelwa indawo isikhala esisodwa. Kungakho okukhiphayo kwe-echo $(ls) kuvela kulayini owodwa.
Uyini umyalo wokubonisa ukuphuma komyalo usebenzisa i-echo?
Umyalo we-echo ubhala umbhalo ekuphumeni okujwayelekile (stdout). I-syntax yokusebenzisa umyalo we-echo ilula kakhulu: lalela [IZINKONDLO] STRING… Okunye ukusetshenziswa okuvamile komyalo we-echo ukuguquguquka kwegobolondo kweminye imiyalo, ukubhala umbhalo ukuze u-stdout kuskripthi segobolondo, nokuqondisa kabusha umbhalo efayeleni.
Ngilinanela kanjani ifayela ku-Linux?
Umyalo we-echo uphrinta izintambo ezidluliswa njengezimpikiswano kokuphumayo okujwayelekile, okungaqondiswa kabusha kufayela. Ukwakha ifayela elisha sebenzisa umyalo we-echo olandelwa umbhalo ofuna ukuwuphrinta nokusebenzisa u-opharetha wokuqondisa kabusha > ukubhala okukhiphayo efayeleni ofuna ukulenza.
Yenzani i-echo $0 Yenzani?
Kuthunyelwe ngu-David the H. $0 is igama lenqubo esebenzayo. Uma uyisebenzisa ngaphakathi kwegobolondo, izobuyisela igama legobolondo. Uma uyisebenzisa ngaphakathi kweskripthi, kuzoba yigama lesikripthi.
Uyini umehluko phakathi kwe-LS ne-echo?
i-echo * nje kunanela amagama amafayela kanye nezinkomba kuhla lwemibhalo lwamanje, ls * ibala amagama amafayela (njengoba i-echo * yenza), kodwa futhi ibala okuqukethwe kwezikhombisi esikhundleni sokumane inikeze igama layo.
Uyini umphumela womyalo kabani?
Incazelo: ubani owayala ukuphuma imininingwane yabasebenzisi okwamanje abangene ngemvume ohlelweni. Okukhiphayo kuhlanganisa igama lomsebenzisi, igama letheminali (angena kulo), usuku kanye nesikhathi sokungena kwabo njll. 11.
Uyini umyalo wohlobo ku-Linux?
thayipha umyalo ku-Linux ngezibonelo. Uhlobo lomyalo ngu esetshenziswa ukuchaza ukuthi impikiswano yayo izohunyushwa kanjani uma isetshenziswa njengemiyalelo. Iphinde isetshenziselwe ukuthola ukuthi ingabe yakhelwe ngaphakathi noma yangaphandle ifayela kanambambili.
Wenzani umyalo we-echo kuMatlab?
Umyalo we-echo ilawula ukuboniswa (noma ukunanela) kwezitatimende kumsebenzi ngesikhathi sokwenziwa kwazo. Imvamisa, izitatimende efayelini lomsebenzi azivezwa esibukweni ngesikhathi sokwenza. I-echoing yomyalo iwusizo ekulungiseni iphutha noma ekuboniseni, okuvumela imiyalo ukuthi ibukwe njengoba iyenza.