Ngiyisusa kanjani imigqa yokuqala eyi-100 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 . ( vele awuwufanele lo mbuzo endaweni yangempela) – thanasisp Sep 22 '20 at 21:30.
27 awu. 2013 g.
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'.
Uyisusa kanjani imigqa efayeleni ku-Unix?
Ukuze Ususe imigqa efayeleni lomthombo ngokwalo, sebenzisa inketho -i ngomyalo we-sed. Uma ungafisi ukususa imigqa efayelini elingumthombo langempela ungaqondisa kabusha okukhiphayo kwe-sed command uye kwelinye ifayela.
Ngiyithola kanjani imigqa yokuqala eyi-100 yefayela ku-Unix?
Thayipha umyalo wekhanda olandelayo ukuze ubonise imigqa yokuqala eyi-10 yefayela elibizwa ngokuthi “bar.txt”:
- ikhanda -10 bar.txt.
- ikhanda -20 bar.txt.
- sed -n 1,10p /etc/group.
- sed -n 1,20p /etc/group.
- awk 'FNR <= 10' /etc/passwd.
- awk 'FNR <= 20' /etc/passwd.
- perl -ne'1..10 bese uphrinta' /etc/passwd.
- perl -ne'1..20 bese uphrinta' /etc/passwd.
18 unyaka. 2018 г.
Uyisusa kanjani imigqa eminingi ku-Unix?
Isusa Imigqa Eminingi
Isibonelo, ukususa imigqa emihlanu uzokwenza lokhu okulandelayo: Cindezela inkinobho ka-Esc ukuya kumodi evamile. Beka ikhesa kulayini wokuqala ofuna ukuwususa. Thayipha u-5dd bese ucindezela u-Enter ukuze ususe imigqa emihlanu elandelayo.
Ngiwususa kanjani ulayini wokugcina ku-Unix?
Manje vele ucindezele u-d kabili kukhibhodi yakho. Lokhu kuzokwenza lokho kanye okufunayo—susa umugqa wokugcina. Ngemva kwalokho, cindezela : kulandele x bese ucindezela u-Enter.
Ngiyisusa kanjani imigqa yokugcina engu-10 ku-Unix?
Susa Imigqa Yokugcina Yefayela ku-Linux
- awu.
- ikhanda.
- ukoma.
- i-tac.
- wc.
8 uNovemba. UDisemba 2020
Uwususa kanjani umugqa owodwa efayelini eliku-Linux?
Ungasebenzisa "umhleli wokusakaza ukuze uhlunge futhi uguqule umbhalo" sed. Lapha, -i kusho ukuhlela ifayela endaweni. d umyalo othi “susa isikhala sephethini; ngokushesha uqale umjikelezo olandelayo”.
Uwufaka kanjani umugqa wokuqala ku-Unix?
Izimpendulo ze-14
Sebenzisa inketho ye- sed yokufaka ( i ) ezofaka umbhalo emugqeni owandulelayo. Futhi qaphela ukuthi okunye ukusetshenziswa okungezona kwe-GNU sed (ngokwesibonelo okuku-macOS) kudinga impikiswano yokuthi -i flag (sebenzisa -i ” ukuze uthole umphumela ofanayo nowe-GNU sed ).
Ngiwususa kanjani umugqa we-grep?
Ukuze ususe imigqa evamile phakathi kwamafayela amabili ungasebenzisa i-grep , comm noma joyina umyalo. I-grep isebenza kuphela kumafayela amancane. Sebenzisa -v kanye no -f . Lokhu kubonisa imigqa esuka kufayela1 engafani nanoma yimuphi umugqa kufayela2 .
Ngiwususa kanjani umugqa ku-CMD?
2 Izimpendulo. Ukhiye we-Escape ( Esc ) uzosula umugqa wokufaka. Ngaphezu kwalokho, ukucindezela u-Ctrl+C kuzohambisa ikhesa emugqeni omusha, ongenalutho.
Uyihlanganisa kanjani imigqa yokuqala eyi-10?
ikhanda -n10 igama lefayela | grep ... ikhanda lizokhipha imigqa yokuqala eyi-10 (usebenzisa inketho ethi -n), bese ungaphayipha lokho okukhiphayo ku-grep . Ungasebenzisa umugqa olandelayo: ikhanda -n 10 /path/to/file | grep […]
Ngilikhombisa kanjani inani lemigqa efayeleni ku-Unix?
Ungabala kanjani imigqa efayeleni ku-UNIX/Linux
- Umyalo othi “wc -l” uma usetshenziswa kuleli fayela, ukhipha isibalo somugqa kanye negama lefayela. $ wc -l file01.txt 5 file01.txt.
- Ukuze ukhiphe igama lefayela kumphumela, sebenzisa: $ wc -l < file01.txt 5.
- Ungakwazi njalo ukunikeza okukhipha umyalo kumyalo we-wc usebenzisa ipayipi. Ngokwesibonelo:
Ngiyikopisha kanjani imigqa yokugcina eyi-10 ku-Linux?
1. ukubala inombolo yemigqa efayeleni, kusetshenziswa `ikati f. txt | wc -l` bese usebenzisa ikhanda nomsila epayipini ukuze uphrinte imigqa yokugcina engu-81424 yefayela (imigqa #totallines-81424-1 kuya ku-#totallines).