Ngiyisusa kanjani imigqa yokuqala eyi-10 ku-Unix?
Susa imigqa yokuqala engu-N yefayela esendaweni emugqeni womyalo we-unix
- Kokubili izinketho ze-sed -i kanye ne-gawk v4.1 -i -inplace ngokuyisisekelo zakha ifayela lesikhashana ngemuva kwezigcawu. I-IMO sed kufanele isheshe kunomsila futhi i-awk. -…
- umsila ushesha izikhathi eziningi kulo msebenzi, kune-sed noma i-awk . (
Ngiwususa kanjani umugqa wokuqala ku-Unix?
Ukususa uhlamvu emugqeni
- Susa amashadi amabili okuqala ku-lin sed 's/^..//'.
- Susa ama-chrecter amabili okugcina emugqeni wefayela le-sed 's/..$//'.
- Susa umugqa ongenalutho ifayela le-sed '/^$/d'.
Ngiwususa kanjani umugqa wokuqala ku-Linux?
Ungawususa kanjani umugqa wokuqala wefayela lombhalo usebenzisa i-linux…
- Sebenzisa umyalo we-sed ukuze ususe umugqa wokuqala wefayela lombhalo. …
- Sebenzisa umyalo we-awk ukuze ususe umugqa wokuqala wefayela lombhalo. …
- Sebenzisa umyalo womsila ukuze ususe umugqa wokuqala wefayela lombhalo.
Ngiyisusa kanjani imigqa embalwa ku-Unix?
Ukukhipha imigqa efayeleni eliwumthombo ngokwalo, sebenzisa inketho ye -i ngomyalo we-sed. Uma ungafisi ukususa imigqa efayelini elingumthombo wangempela ungaqondisa kabusha okukhiphayo komyalo we-sed uye kwelinye ifayela.
Uyisusa kanjani imigqa yokuqala emi-3 ku-Unix?
Isebenza kanjani:
- -i inketho hlela ifayela ngokwalo. Ungase futhi ususe leyo nketho bese uqondisa kabusha okukhiphayo efayeleni elisha noma komunye umyalo uma ufuna.
- 1d isusa umugqa wokuqala ( 1 ukwenza kuphela kulayini wokuqala, d ukuwususa)
- I-$d isusa umugqa wokugcina ( $ ukwenza kuphela kulayini wokugcina, d ukuwususa)
Ngiyisusa kanjani imigqa yokugcina engu-10 ku-Unix?
Ijikeleza kancane, kodwa ngicabanga ukuthi kulula ukuyilandela.
- Bala inani lemigqa efayeleni elikhulu.
- Susa inombolo yemigqa ofuna ukuyisusa esibalweni.
- Phrinta inombolo yemigqa ofuna ukuyigcina futhi uyigcine kufayela lesikhashana.
- Shintshanisa ifayela eliyinhloko ufake ifayela lesikhashana.
- Susa ifayela lesikhashana.
Ngiwususa kanjani ulayini wokugcina ku-Unix?
Izimpendulo ze-6
- Sebenzisa i-sed -i '$d' ukuhlela ifayela endaweni. -…
- Kungaba yini ukususa imigqa engu-n yokugcina, lapho u-n eyinombolo ephelele? -…
- @JoshuaSalazar for i in {1..N}; do sed -i '$d' ; usuqedile ungakhohlwa ukufaka u-N – ghilesZ Oct 21 '20 ngo-13:23.
Ungawakha kanjani umugqa wokuqala ku-Unix?
14 Izimpendulo. Sebenzisa inketho ye-sed's insert (i). ezofaka umbhalo emugqeni owandulelayo. Futhi qaphela ukuthi okunye ukusetshenziswa okungezona kwe-GNU sed (ngokwesibonelo leyo eku-macOS) idinga i-agumenti ye- -i flag (sebenzisa -i ” ukuze uthole umphumela ofanayo nowe-GNU sed ).
Kuyini ukusetshenziswa kwe-awk ku-Linux?
I-Awk iyinsiza eyenza umhleli akwazi ukubhala izinhlelo ezincane kodwa eziphumelelayo ngendlela yezitatimende ezichaza amaphethini ombhalo okufanele aseshwe kulayini ngamunye wedokhumenti kanye nesenzo okufanele sithathwe lapho okufanayo kutholakala ngaphakathi umugqa. I-Awk isetshenziswa kakhulu ukuskena iphethini nokucubungula.
Ngiwususa kanjani umugqa ku-Linux?
Isusa Ulayini
- Cindezela ukhiye we-Esc ukuze uye kumodi evamile.
- Beka ikhesa kulayini ofuna ukuwususa.
- Thayipha u-dd bese ushaya u-Enter ukuze ususe umugqa.
Iyiphi esheshayo i-awk noma i-sed?
I-sed yenze kangcono kune-awk - ukuthuthukiswa kwesekhondi elingu-42 ngaphezu kokuphindaphinda okungu-10. Ngokumangazayo (kimi), iskripthi sePython senze cishe kanye nezinsiza ezakhelwe ngaphakathi ze-Unix. … (Noma mhlawumbe iPython ishesha kakhulu…)
Uweqa kanjani umugqa wokuqala ngenkathi ufunda ifayela ku-Unix?
1 Impendulo. Sebenzisa ukufunda okwengeziwe ngaphakathi komyalo ohlanganisiwe. Lokhu kusebenza kahle kakhulu kunokusebenzisa inqubo ehlukile ukweqa umugqa wokuqala, futhi kuvimbela iluphu yesikhathi ekusebenzeni kugobolondo elincane (okungase kubaluleke uma uzama ukusetha noma yikuphi okuguquguqukayo emzimbeni weluphu).