Ngiwukhipha kanjani umugqa othize efayeleni eliku-Unix?

Uwuthola kanjani umugqa othize efayeleni eliku-Unix?

Izihloko ezihlobene Nalesi

1. awk : $>awk '{if(NR==LINE_NUMBER) phrinta $0}' file.txt.
2. sed : $>sed -n LINE_NUMBERp file.txt.
3. ikhanda : $>head -n LINE_NUMBER file.txt | umsila -n + LINE_NUMBER Nansi i-LINE_NUMBER, iyiphi inombolo yomugqa ofuna ukuyiphrinta. Izibonelo: Phrinta umugqa kusuka efayeleni elilodwa.

26 isiqephu. 2017 g.

Ukhipha kanjani ulayini abambalwa ku-Linux?

Ukuze ukhiphe uhla lwemigqa, isho ulayini 2 kuye ku-4, ungenza noma yikuphi kokulandelayo:

1. $ sed -n 2,4p somefile. txt.
2. $ sed '2,4! d'ifayela. txt.

Ngiyenza kanjani i-grep inombolo ethile yomugqa ku-Unix?

Ukuthi isebenza kanjani

1. Okokuqala, sisebenzisa -n inketho yokwengeza izinombolo zomugqa ngaphambi komugqa ngamunye. Sifuna ukubala yonke imigqa esiyifanisayo . …
2. Bese sisebenzisa izinkulumo ezijwayelekile ezinwetshiwe ukuze sikwazi ukusebenzisa | uhlamvu olukhethekile olusebenza njengokuthi NOMA.

12 isiqephu. 2012 g.

How do I find a specific string in a file in Linux?

I-Grep iyithuluzi lomugqa womyalo we-Linux / Unix elisetshenziselwa ukucinga uchungechunge lwezinhlamvu efayeleni elishiwo. Iphethini yokusesha umbhalo ibizwa ngokuthi isisho esivamile. Uma ithola okufanayo, iphrinta umugqa nomphumela. Umyalo we-grep uyasebenza lapho usesha amafayela amakhulu welogi.

Uwengeza kanjani umugqa efayeleni ku-Linux?

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.

Uyibonisa kanjani imigqa yokuqala emi-5 yefayela ku-Unix?

isibonelo somyalo wekhanda ukuze uphrinte imigqa yokuqala engu-10/20

1. ikhanda -10 bar.txt.
2. ikhanda -20 bar.txt.
3. sed -n 1,10p /etc/group.
4. sed -n 1,20p /etc/group.
5. awk 'FNR <= 10' /etc/passwd.
6. awk 'FNR <= 20' /etc/passwd.
7. perl -ne'1..10 bese uphrinta' /etc/passwd.
8. perl -ne'1..20 bese uphrinta' /etc/passwd.

18 unyaka. 2018 г.

Uwuthola kanjani umugqa we-nth ku-Unix?

Ngezansi kunezindlela ezintathu ezinhle zokuthola umugqa we-nth wefayela ku-Linux.

1. ikhanda / umsila. Ukusebenzisa nje inhlanganisela yemiyalo yekhanda nomsila cishe kuyindlela elula kakhulu. …
2. sed. Kunezindlela ezimbalwa ezinhle zokwenza lokhu nge-sed. …
3. awu. I-awk ine-NR eyakhelwe ngaphakathi egcina umkhondo wezinombolo zemigqa yefayela/yokusakaza.

Ungawukhetha kanjani umugqa ku-Linux?

Cindezela ukhiye wasekhaya ukuze ufike ekuqaleni komugqa. Ukuze Ukhethe imigqa eminingi, sebenzisa inkinobho ethi Phezulu/Phansi. Indlela engcono kakhulu ukuthi, Beka isifundo sakho ephuzwini ofuna ukuliqala. Cindezela okuthi Shift bese uchofoza iphuzu ofuna ukuliqeda usebenzisa igundane/iphedi yokuthinta.

Ungaphrinta kanjani uhla lwemigqa ku-Unix?

Umyalo we-Linux Sed ikuvumela ukuthi uphrinte imigqa ethile kuphela ngokusekelwe enambeni yomugqa noma amaphethini afanayo. "p" umyalo wokuphrinta idatha kusuka kubhafa yephethini. Ukucindezela ukuphrinta okuzenzakalelayo kwesikhala sephethini sebenzisa -n umyalo nge-sed.

Uwuhlanganisa kanjani umugqa othize?

Umyalo olandelayo uzokwenza lokho okucelile “khipha imigqa phakathi kuka-1234 no-5555” kokuthi someFile. Awudingi ukusebenzisa i-grep elandelwa yi- sed . esusa yonke imigqa kusukela emugqeni wokuqala ofanisiwe kuya kowokugcina, kuhlanganisa naleyo migqa. Sebenzisa u-sed -n ngo-“p” esikhundleni sika-“d” ukuze uphrinte leyo migqa esikhundleni salokho.

Uwenza kanjani amagama amaningi emgqeni owodwa ku-Unix?

Ngingenza kanjani amaphethini amaningi?

1. Sebenzisa izingcaphuno ezilodwa kuphethini: grep 'pattern*' file1 file2.
2. Sebenzisa okulandelayo izinkulumo ezivamile ezinwetshiwe: egrep 'pattern1|pattern2' *. py.
3. Ekugcineni, zama kumagobolondo/ama-ose amadala e-Unix: grep -e pattern1 -e pattern2 *. pl.
4. Enye inketho yokufaka izintambo ezimbili: grep 'word1|word2' input.

Februwari 25 2021

Ngiwenza kanjani umugqa wokuqala wefayela ku-Unix?

Unezinketho ezimbalwa usebenzisa izinhlelo kanye ne-grep . Okulula kakhulu ngombono wami ukusebenzisa ikhanda : head -n10 filename | grep ... ikhanda lizokhipha imigqa yokuqala eyi-10 (usebenzisa inketho ethi -n), bese ungaphayipha lokho okukhiphayo ku-grep .

Ngiwucinga kanjani wonke umbhalo efayeleni ku-Linux?

Ukuze uthole amafayela aqukethe umbhalo othile ku-Linux, yenza okulandelayo.

1. Vula uhlelo lwakho lokusebenza lwetheminali oluthandayo. Itheminali ye-XFCE4 yinto engiyithandayo.
2. Zulazula (uma kudingeka) uye kufolda ozosesha kuyo amafayela ngombhalo othile.
3. Thayipha umyalo olandelayo: grep -iRl “your-text-to-find” ./

4 isiqephu. 2017 g.

Uyithola kanjani indlela yefayela ku-Linux?

Ukuthola indlela egcwele yefayela, sisebenzisa umyalo we-readlink. i-readlink iphrinta indlela ephelele yesixhumanisi esingokomfanekiso, kodwa njenge-side-effect, iphinda iphrinte indlela ephelele yendlela ehlobene.

Ngilithola kanjani ifayela kulayini womyalo we-Linux?

Izibonelo Eziyisisekelo

1. thola . – qamba leli fayela.txt. Uma udinga ukwazi ukuthi ulithola kanjani ifayela ku-Linux elibizwa ngokuthi leli fayela. …
2. thola /igama lasekhaya *.jpg. Bheka konke. jpg amafayela ku/home kanye nezinkomba ezingezansi kwayo.
3. thola . – thayipha f -akunalutho. Bheka ifayela elingenalutho ngaphakathi kohla lwemibhalo lwamanje.
4. thola /home -user randomperson-mtime 6 -igama “.db”

25 unyaka. 2019 г.