Isibonelo, uhlamvu olukhethekile oluvame ukusetshenziswa kakhulu yinkanyezi, * , okusho ukuthi “uziro noma izinhlamvu eziningi”. Uma uthayipha umyalo njengokuthi ls a* , igobolondo lithola wonke amagama wefayela ohlwini lwamanje oluqala ngo a bese liwadlulisela kumyalo we-ls.
Kusho ukuthini * kumugqa womyalo weLinux?
Kulokhu, sisebenzise *i-wildcard ukuze siqonde "wonke amafayela ohlwini lwamanje". Lo myalo uphrinta umugqa oqukethe iyunithi yezinhlamvu enikeziwe, futhi uma kunefayela elingaphezu kwelilodwa ohlwini, igama lefayela lapho litholakale khona. Ukuze uhlole amafayela kuma-subdirectories nawo, sebenzisa i--r flag ngomyalo we-grep.
Isho ukuthini inkanyezi kutheminali?
Igobolondo lihumusha izinhlamvu ezithile emagameni wefayela nangezinye izinjongo futhi. Idlulisela inguqulo ehunyushiwe emiyalweni. … Inkanyezi ekugcineni komugqa womyalo iphathwa ngendlela efanayo nenkanyezi noma yikuphi kwenye indawo emgqeni — i-wildcard efana nezinhlamvu eziziro noma ngaphezulu.
I-asterisk ibizwa ngani ku-Linux?
Inkanyezi * iyiglobhu ngolimi lwegobolondo. Icaphuna ku-Shell Command Language: Inkanyezi ( '*' ) iyiphethini ezofanelana nanoma iyiphi iyunithi yezinhlamvu, kuhlanganise neyunithi yezinhlamvu engenalutho.
Isho ukuthini inkanyezi eduze kwefayela i-Linux?
Inkanyezi * ingenye yalezo zinhlamvu ezikhethekile, kunjalo ingxenye yephethini ehambisana nombhalo futhi isetshenziselwa ukunwetshwa kwegama lefayela. Ngamanye amazwi, imiyalo efana ne-echo *. txt izothatha indawo yephethini ngamafayela afana nephethini.
Kusho ukuthini i-* ku-Linux?
Ngokwesibonelo, uhlamvu olukhethekile oluvame ukusetshenziswa kakhulu yinkanyezi, * , okusho ukuthi “izinhlamvu zero noma ngaphezulu“. Uma uthayipha umyalo njengokuthi ls a* , igobolondo lithola wonke amagama wefayela ohlwini lwamanje oluqala ngo a bese liwadlulisela kumyalo we-ls.
Isho ukuthini inkanyezi endleleni?
** Le phethini ivamise ukusetshenziswa kokuthi Kopisha Umsebenzi wokuzulazula kwesihlahla sefolda. Ngokuyisisekelo kusho lokho wonke amafayela anokulungiselelwa kwesandiso azocutshungulwa kuwo wonke ama-subdirectories endlela ye-$(Services_Jobs_Drop_Path).
Yini inkanyezi ku-bash?
Inkanyezi ekabili isetshenziswa ezimweni ezimbili ezihlukene: Isetshenziswa njengo-opharetha ochazayo kumongo we-arithmetic. Isetshenziswa njenge-opharetha enwetshiwe yokufanisa ifayela kusuka ku-Bash 4, okusho ukuthi ifanisa amagama wefayela nezinkomba ngokuphindaphindiwe.
Kusho ukuthini uma ubona * asterisks eduze kwegama lefayela lakho?
* kusho ukuthi ifayela iyasebenza.
Inkanyezi * yenzani i-Unix?
Ukuhunyushwa kwe*.
I-*. * wildcard kwaba ngokuvamile esetshenziselwa ukufanisa noma yiliphi ifayela. Njengeglobhu ye-Unix, i-* izofanisa nanoma yikuphi ukulandelana kwezinhlamvu egameni lefayela, kanjalo * iyodwa izophinde ifane nanoma yiliphi ifayela.
Ngizishintsha kanjani izimvume zefayela ku-Linux?
Ukushintsha izimvume zohla lwemibhalo ku-Linux, sebenzisa okulandelayo:
- chmod +rwx igama lefayela ukuze wengeze izimvume.
- chmod -rwx directoryname ukususa izimvume.
- chmod +x igama lefayela ukuze uvumele izimvume ezisebenzisekayo.
- chmod -wx filename ukuthatha izimvume zokubhala nezisebenzisekayo.
Ngilenza kanjani ifayela lisebenze ku-Linux?
Izinyathelo zokubhala nokwenza iskripthi
- Vula ukuphela. Iya enkombeni lapho ufuna ukudala khona umbhalo wakho.
- Dala ifayela nge. sh ukunwetshwa.
- Bhala iskripthi kufayela usebenzisa isihleli.
- Yenza iskripthi sisebenze ngomyalo chmod +x .
- Qalisa iskripthi usebenzisa ./ .
Isho ukuthini inkanyezi ku-ls?
Kusho lokho ifayela liyasebenziseka. Isihlukanisi siboniswa lapho -F idluliselwa ku-ls ngomugqa womyalo noma ngenye indlela. Ngokuqondene ne-emulator ebukeka isebenziseka ongeke ukwazi ukusisebenzisa, lokhu kungenzeka uma isilayishi esiguqukayo esicelwe yisifanisi singekho.