Cov lus txib grep tshawb nrhiav los ntawm cov ntaub ntawv, nrhiav kev sib tw rau cov qauv teev tseg. Txhawm rau siv nws ntaus grep, ces tus qauv peb tab tom nrhiav thiab thaum kawg lub npe ntawm cov ntaub ntawv (lossis cov ntaub ntawv) peb tab tom nrhiav hauv. Cov zis yog peb kab hauv cov ntaub ntawv uas muaj cov ntawv 'tsis'.
Kuv yuav siv grep li cas los nrhiav cov lus?
Qhov yooj yim tshaj ntawm ob cov lus txib yog siv grep's -w xaiv. Qhov no yuav pom tsuas yog kab uas muaj koj lub hom phiaj lo lus ua ib lo lus tiav. Khiav cov lus txib "grep -w hub" tiv thaiv koj cov ntaub ntawv lub hom phiaj thiab koj tsuas yog pom cov kab uas muaj lo lus "hub" ua tiav lo lus.
Kuv yuav tshawb nrhiav lo lus tshwj xeeb hauv cov ntaub ntawv hauv Linux li cas?
Yuav Ua Li Cas Pom Cov Lus Qhia tshwj xeeb hauv Cov Ntaub Ntawv ntawm Linux
- grep -Rw '/path/to/search/' -e ' qauv'
- grep –exclude=*.csv -Rw '/path/to/search' -e ' qauv'
- grep –exclude-dir={dir1,dir2,*_old} -Rw '/path/to/search' -e 'pattern'
- nrhiav. - lub npe "*.php" -exec grep "pattern" {} ;
Kuv yuav ua li cas grep ob lo lus hauv Linux?
Yuav ua li cas kuv grep rau ntau tus qauv?
- Siv ib qho lus hais hauv tus qauv: grep 'pattern *' file1 file2.
- Tom ntej no siv txuas cov kab lus tsis tu ncua: egreg 'pattern1|pattern2' * . py.
- Thaum kawg, sim cov laus Unix plhaub/oses: grep -e pattern1 -e pattern2 *. pl.
- Lwm qhov kev xaiv rau grep ob txoj hlua: grep 'word1|word2' input.
How does grep command work?
grep lim tshawb nrhiav cov ntaub ntawv rau ib qho qauv ntawm cov cim, thiab qhia tag nrho cov kab uas muaj cov qauv ntawd. Cov qauv uas tau tshawb nrhiav hauv cov ntaub ntawv raug xa mus rau qhov kev qhia tsis tu ncua (grep sawv cev rau kev tshawb nrhiav thoob ntiaj teb rau kev qhia tsis tu ncua thiab luam tawm).
Kuv siv nrhiav hauv Linux li cas?
Cov lus txib nrhiav yog siv los tshawb nrhiav thiab nrhiav cov npe ntawm cov ntaub ntawv thiab cov npe raws li cov xwm txheej uas koj tau teev tseg rau cov ntaub ntawv uas phim cov lus sib cav. nrhiav cov lus txib tuaj yeem siv ntau yam xws li koj tuaj yeem nrhiav cov ntaub ntawv los ntawm kev tso cai, cov neeg siv, pawg, hom ntaub ntawv, hnub tim, qhov loj me, thiab lwm yam ua tau.
Dab tsi yog hauv grep hais kom ua?
Cov lus txib grep tuaj yeem nrhiav ib txoj hlua nyob rau hauv pab pawg ntawm cov ntaub ntawv. Thaum nws pom ib qho qauv uas sib xws hauv ntau tshaj ib cov ntaub ntawv, nws luam tawm lub npe ntawm cov ntaub ntawv, ua raws li txoj hnyuv loj, ces kab sib piv cov qauv.
Kuv yuav tshawb nrhiav cov ntawv hauv txhua cov ntaub ntawv hauv Linux li cas?
Grep yog Linux / Unix command-line cuab yeej siv los tshawb nrhiav ib txoj hlua ntawm cov cim hauv cov ntaub ntawv teev tseg. Cov ntawv tshawb nrhiav qauv yog hu ua cov lus qhia tsis tu ncua. Thaum nws pom qhov sib tw, nws luam cov kab nrog qhov tshwm sim. Cov lus txib grep yog ib qho yooj yim thaum tshawb nrhiav los ntawm cov ntaub ntawv log loj.
Kuv yuav nrhiav tau grep hais kom ua hauv Unix li cas?
Txhawm rau siv nws ntaus grep, ces tus qauv peb tab tom nrhiav rau thiab thaum kawg lub npe ntawm cov ntaub ntawv (lossis cov ntaub ntawv) peb tab tom nrhiav hauv. Cov zis yog peb kab hauv cov ntaub ntawv uas muaj cov ntawv 'tsis yog'. Los ntawm lub neej ntawd, grep tshawb nrhiav tus qauv hauv qhov xwm txheej-sensitive.
Yuav ua li cas kuv muab ob grep commands?
Muaj ob txoj hauv kev:
- Pab pawg lawv: { grep 'substring1' file1.txt grep 'substring2' file2.txt } > outfile.txt. …
- Siv lub appending redirection neeg teb xov tooj >> rau qhov thib ob redirection: grep 'substring1' file1.txt > outfile.txt grep 'substring2' file2.txt >> outfile.txt.
Koj grep cov cim tshwj xeeb li cas?
Kom phim tus cwj pwm uas tshwj xeeb rau grep -E, muab ib tug backslash ( ) nyob rau hauv pem hauv ntej ntawm tus cwj pwm. Nws yog feem ntau yooj yim dua los siv grep –F thaum koj tsis xav tau cov qauv tshwj xeeb txuam.
Puas yog Fgrep sai dua grep?
Yog ceev grep sai? Lub chaw siv hluav taws xob grep tshawb nrhiav cov ntawv sau rau cov kab lus tsis tu ncua, tab sis nws tuaj yeem tshawb nrhiav cov hlua zoo tib yam vim cov hlua no yog ib qho tshwj xeeb ntawm cov kab lus tsis tu ncua. Txawm li cas los xij, yog tias koj cov lus qhia ib txwm muaj nyob rau hauv qhov tseeb tsuas yog cov kab ntawv, fgrep yuav nrawm dua grep .
Why grep so fast?
Here’s a note from the author, Mike Haertel: GNU grep is fast because it AVOIDS LOOKING AT EVERY INPUT BYTE. GNU grep is fast because it EXECUTES VERY FEW INSTRUCTIONS FOR EACH BYTE that it does look at.
What does grep command do in Linux?
Grep is an essential Linux and Unix command. It is used to search text and strings in a given file. Hauv lwm lo lus, grep cov lus txib tshawb nrhiav cov ntaub ntawv muab rau cov kab uas muaj qhov sib tw rau cov hlua los yog cov lus. Nws yog ib qho ntawm cov lus txib tseem ceeb tshaj plaws ntawm Linux thiab Unix-zoo li system rau cov neeg tsim khoom thiab sysadmins.