Ndiwukhupha njani umgca othile kwifayile ekwi Unix?

Uwufumana njani umgca othile kwifayile ekwi Unix?

Amanqaku Afana

1. awk : $>awk '{ukuba(NR==LINE_NUMBER) shicilela $0}' file.txt.
2. sed : $>sed -n LINE_NUMBERp file.txt.
3. intloko : $>intloko -n LINE_NUMBER ifayile.txt | umsila -n + LINE_NUMBER Apha LINE_NUMBER yi, yeyiphi inombolo yomgca ofuna ukuyiprinta. Imizekelo: Shicilela umgca kwifayile enye.

26 сент. Ngo-2017

How extract a few line in Linux?

Ukukhupha uluhlu lwemigca, yithi umgca 2 ukuya ku-4, ungenza enye yezi zilandelayo:

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

Ndiyenza njani igrep inombolo ethile yomgca kwi-Unix?

Ingaba isebenza kanjani

1. Okokuqala, sisebenzisa -n ukhetho ukongeza amanani emigca phambi komgca ngamnye. Sifuna ukubala yonke imigca esiyithelekisayo . …
2. Emva koko sisebenzisa iintetho eziqhelekileyo ezongeziweyo ukuze sisebenzise | uphawu olulodwa olusebenza njenge OR.

12 сент. Ngo-2012

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

IGrep yiLinux / Unix isixhobo somgca womyalelo esisetyenziselwa ukukhangela uluhlu lwamagama kwifayile ekhankanyiweyo. Ipatheni yophendlo lokubhaliweyo ibizwa ngokuba luphawu oluqhelekileyo. Xa ifumana umdlalo, iprinta umgca ngesiphumo. Umyalelo we-grep uluncedo xa ukhangela iifayile ezinkulu zelog.

Wongeza njani umgca kwifayile kwiLinux?

Ngokomzekelo, ungasebenzisa umyalelo we-echo ukufaka isicatshulwa ekupheleni kwefayile njengoko kubonisiwe. Kungenjalo, ungasebenzisa umyalelo printf (ungalibali ukusebenzisa unobumba u-n ukongeza umgca olandelayo). Ungasebenzisa kwakhona umyalelo wekati ukudibanisa isicatshulwa kwifayile enye okanye ngaphezulu kwaye uyifake kwenye ifayile.

Uyibonisa njani imigca emi-5 yokuqala yefayile kwi Unix?

umzekelo womyalelo wentloko ukuprinta imigca eyi-10/20 yokuqala

1. intloko -10 bar.txt.
2. intloko -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 kwaye uprinte' /etc/passwd.
8. perl -ne'1..20 kwaye uprinte' /etc/passwd.

18 kwiintsuku. Ngo-2018

Uwufumana njani umgca we-nth kwi-Unix?

Ngezantsi kukho iindlela ezintathu ezilungileyo zokufumana umgca we-nth wefayile kwi-Linux.

1. intloko / umsila. Ukusebenzisa ngokulula indibaniselwano yemiyalelo yentloko nomsila yeyona ndlela ilula. …
2. sed. Kukho iindlela ezimbalwa ezintle zokwenza oku nge sed . …
3. awk. i-awk ine-NR eyakhelweyo eyakhiweyo egcina umkhondo wefayile/amanani omqolo womsinga.

Uwukhetha njani umgca kwiLinux?

Cofa iqhosha laseKhaya ukuze ufike ekuqaleni komgca. Ukukhetha imigca emininzi, sebenzisa iqhosha elithi Phezulu/ezantsi. Eyona ndlela ingcono kukuba, Beka ikhosi yakho kwindawo ofuna ukuyiqala. Cofa uShift emva koko ucofe indawo ofuna ukuyiphelisa usebenzisa imouse/touchpad.

Uluprinta njani uluhlu lwemigca kwi-Unix?

Umyalelo we-Linux Sed ikuvumela ukuba uprinte iilayini ezithile kuphela ngokusekelwe kwinombolo yelayini okanye iipateni ezihambelanayo. "p" ngumyalelo woshicilelo lwedatha kwibuffer yepateni. Ukucinezela ushicilelo oluzenzekelayo lwesithuba sepateni sebenzisa -n umyalelo nge sed.

Uwenza njani umgca othile?

Lo myalelo ulandelayo uya kwenza le nto uyicelileyo "khupha imigca phakathi kwe-1234 kunye ne-5555" kwiFayile ethile. Awudingi ukuqhuba i-grep elandelwa ngu sed . ecima yonke imigca ukusuka kumgca wokuqala ohambelanayo ukuya kumdlalo wokugqibela, ukuquka loo migca. Sebenzisa u-sed -n ngo-“p” endaweni ka-“d” ukuprinta loo migca endaweni yoko.

Uwenza njani amagama amaninzi kumgca omnye kwi-Unix?

Ndizenza njani iipateni ezininzi?

1. Sebenzisa ucaphulo olunye kwipatheni: grep 'pattern*' file1 file2.
2. Sebenzisa ngokulandelayo amabinzana aqhelekileyo awandisiweyo: egrep 'pattern1|pattern2' *. py.
3. Okokugqibela, zama kumaqokobhe amadala e-Unix/oses: grep -e pattern1 -e pattern2 *. pl.
4. Enye inketho yokwenza i-grep imitya emibini: i-grep 'word1|word2' igalelo.

I-25 февр. 2021 г.

Ndiwenza njani umgca wokuqala wefayile kwi Unix?

Uneendlela ezimbalwa onokukhetha kuzo usebenzisa iinkqubo kunye ne-grep. Eyona nto ilula kwimbono yam kukusebenzisa intloko : intloko -n10 filename | grep ... intloko iya kukhupha imigca eli-10 yokuqala (usebenzisa i -n ukhetho), kwaye ke ungabhobhoza eso siphumo kwi grep .

Ndikukhangela njani konke okubhaliweyo kwifayile kwiLinux?

Ukufumana iifayile eziqulathe umbhalo othile kwiLinux, yenza oku kulandelayo.

1. Vula i-terminal app oyithandayo. Itheminali ye-XFCE4 lukhetho lwam.
2. Lawula (ukuba kuyafuneka) kwisiqulathi seefayili apho uya kukhangela iifayile ngombhalo othile.
3. Chwetheza lo myalelo ulandelayo: grep -iRl “umbhalo-wakho-ukufumana” ./

4 сент. Ngo-2017

Uwufumana njani umendo wefayile kwiLinux?

Ukufumana umendo opheleleyo wefayile, sisebenzisa i-readlink umyalelo. i-readlink ishicilela umendo ogqibeleleyo wekhonkco lomfuziselo, kodwa njengesiphumo secala, ikwaprinta indlela epheleleyo yomendo ozalanayo.

Ndiyifumana njani ifayile kumgca womyalelo weLinux?

Imizekelo esisiseko

1. fumana . – igama lefayile.txt. Ukuba ufuna ukwazi ukuba ungayifumana njani ifayile kwiLinux ebizwa ngale fayile. …
2. fumana /ikhaya -igama *.jpg. Khangela zonke. jpg iifayile kwi/ekhaya kunye nabalawuli abangaphantsi kwayo.
3. fumana . – uhlobo f -engenanto. Khangela ifayile engenanto ngaphakathi kulawulo lwangoku.
4. fumana / ikhaya -umsebenzisi randomperson-mtime 6 -igama ".db"

25 kwiintsuku. Ngo-2019