Isibonelo, ungasebenzisa umyalo we-echo ukwengeza umbhalo ekupheleni kwefayela njengoba kukhonjisiwe. Kungenjalo, ungasebenzisa umyalo we-printf (ungakhohlwa ukusebenzisa uhlamvu luka-n ukwengeza umugqa olandelayo). Ungasebenzisa futhi umyalo wekati ukuze uhlanganise umbhalo osuka kufayela elilodwa noma amaningi futhi uwuhlanganise kwelinye ifayela.
Ngiwengeza kanjani umugqa efayeleni ku-Linux?
sed – Ukufaka Imigqa Efayeleni
- Faka umugqa usebenzisa inombolo yolayini. Lokhu kuzofaka umugqa ngaphambi komugqa enombolweni 'N'. I-syntax: sed 'N i ' FILE.txt Isibonelo: ...
- Faka imigqa usebenzisa i-Regular expression. Lokhu kuzofaka umugqa ngaphambi kwawo wonke umugqa lapho kutholakala khona ukufana kwephethini. I-syntax:
19 izinyanga. 2015 г.
Ngiyengeza kanjani imigqa efayeleni?
Sebenzisa i-> opharetha ukwengeza umbhalo efayeleni. lokhu kuzokwengeza imigqa engama-720 (30*24) ku-o.
Ngiwengeza kanjani umugqa efayeleni ku-Unix?
Ungasebenzisa umyalo wekati ukwengeza idatha noma umbhalo efayeleni. Umyalo wekati ungaphinda ufake idatha kanambambili. Injongo eyinhloko yomyalo wekati iwukubonisa idatha kusikrini (stdout) noma ukuhlanganisa amafayela ngaphansi kwe-Linux noma i-Unix njengamasistimu okusebenza. Ukwengeza umugqa owodwa ungasebenzisa umyalo we-echo noma we-printf.
Ngiwengeza kanjani umbhalo efayeleni ku-Linux?
Udinga ukusebenzisa okuthi >> ukwengeza umbhalo ekupheleni kwefayela. Kuyasiza futhi ukuqondisa kabusha nokwengeza/ukwengeza umugqa ekupheleni kwefayela ku-Linux noma kusistimu efana ne-Unix.
Ulifunda kanjani ifayela ku-Linux?
Nazi ezinye izindlela eziwusizo zokuvula ifayela kutheminali:
- Vula ifayela usebenzisa umyalo wekati.
- Vula ifayela usebenzisa umyalo omncane.
- Vula ifayela usebenzisa umyalo owengeziwe.
- Vula ifayela usebenzisa umyalo we-nl.
- Vula ifayela usebenzisa umyalo we-gnome-open.
- Vula ifayela usebenzisa umyalo wekhanda.
- Vula ifayela usebenzisa umyalo womsila.
Ngilikopisha kanjani ifayela ku-Linux?
Ikopisha Amafayela nge-cp Command
Kuzinhlelo zokusebenza ze-Linux ne-Unix, umyalo we-cp usetshenziselwa ukukopisha amafayela nezinkomba. Uma ifayela okuyiwa kulo likhona, lizocishwa. Ukuze uthole ukwaziswa kokuqinisekisa ngaphambi kokubhala phezu kwamafayela, sebenzisa inketho ethi -i.
Yini oyisebenzisayo ukuze udlulisele amaphutha kufayela?
Izimpendulo ze-2
- Qondisa kabusha i-stdout kufayela elilodwa bese u-stderr uye kwelinye ifayela: umyalo> ukuphuma 2>iphutha.
- Qondisa kabusha i-stdout kufayela ( >out ), bese uqondisa kabusha i-stderr ku-stdout ( 2>&1 ): umyalo > ukuphuma 2>&1.
Ulenza kanjani ifayela ku-Unix?
Vula Itheminali bese uthayipha umyalo olandelayo ukuze udale ifayela elibizwa ngokuthi demo.txt, faka:
- echo 'Umnyakazo owinayo kuphela awukona ukudlala.' > …
- printf 'Umnyakazo owinayo kuphela awukona ukudlala.n' > demo.txt.
- printf 'Umnyakazo owinayo kuphela awukona ukudlala.n Umthombo: WarGames movien' > demo-1.txt.
- ikati > izingcaphuno.txt.
- cat quotes.txt.
6 okthoba. 2013 g.
Uwubhala kanjani umugqa efayeleni kusikripthi segobolondo?
Ukusebenzisa i-'>>' ngomyalo we-'echo' kuhlanganisa umugqa efayeleni. Enye indlela iwukusebenzisa imiyalo ethi 'echo,' pipe(|), kanye ne-'tee' ukwengeza okuqukethwe efayeleni. Ukuthi le miyalo ingasetshenziswa kanjani kuskripthi se-bash kukhonjisiwe kulesi sihloko. Dala ifayela lombhalo eliqanjwe izincwadi.