Umyalo we-grep usesha ifayela, ufuna okufanayo nephethini eshiwo. Ukuyisebenzisa thayipha grep , bese iphethini esiyicingayo futhi ekugcineni igama lefayela (noma amafayela) esisesha kulo. Okukhiphayo imigqa emithathu efayeleni equkethe izinhlamvu ezithi 'hhayi'.
Ngisebenzisa kanjani i-grep ukuthola amagama?
Okulula kule miyalo emibili ukusebenzisa inketho ye-grep's -w. Lokhu kuzothola imigqa kuphela equkethe igama lakho okuhlosiwe njengegama eliphelele. Qalisa umyalo othi “grep -w hub” ngokumelene nefayela lakho oliqondisayo futhi uzobona kuphela imigqa equkethe igama elithi “hub” njengegama eliphelele.
Ngilicinga kanjani igama elithile efayeleni ku-Linux?
Ungalithola Kanjani Igama Eliqondile Efayeleni ku-Linux
- grep -Rw '/indlela/yoku/sesha/' -e 'iphethini'
- grep –exclude=*.csv -Rw '/path/to/search' -e 'iphethini'
- grep -exclude-dir={dir1,dir2,*_old} -Rw '/path/to/search' -e 'iphethini'
- thola . – igama “*.php” -exec grep “iphethini” {};
Ngiwenza kanjani amagama amabili ku-Linux?
Ngingenza kanjani amaphethini amaningi?
- Sebenzisa izingcaphuno ezilodwa kuphethini: grep 'pattern*' file1 file2.
- Sebenzisa okulandelayo izinkulumo ezivamile ezinwetshiwe: egrep 'pattern1|pattern2' *. py.
- Ekugcineni, zama kumagobolondo/ama-ose amadala e-Unix: grep -e pattern1 -e pattern2 *. pl.
- Enye inketho yokufaka izintambo ezimbili: grep 'word1|word2' input.
Ngabe i-grep command isebenza kanjani?
Isihlungi se-grep isesha ifayela iphethini ethile yezinhlamvu, futhi ibonisa yonke imigqa equkethe leyo phethini. Iphethini eliseshwayo efayeleni ibizwa ngokuthi yinkulumo evamile (i-grep imele ukusesha emhlabeni jikelele kwenkulumo evamile nokuphrinta).
Ngisebenzisa kanjani ukuthola ku-Linux?
Umyalo wokuthola uthi esetshenziselwa ukusesha futhi uthole uhlu lwamafayela nezinkomba ngokusekelwe ezimeni ozicacisayo zamafayela afana nokuphikisana. Thola umyalo ungasetshenziswa ezimeni ezihlukahlukene njengokuthi ungathola amafayela ngezimvume, abasebenzisi, amaqembu, izinhlobo zamafayela, idethi, usayizi, nezinye izimo ezingaba khona.
Kuyini umyalo we-grep?
Umyalo we-grep unga sesha iyunithi yezinhlamvu emaqenjini amafayela. Uma ithola iphethini efana nefayela elingaphezu kwelilodwa, iphrinta igama lefayela, ilandelwe ikholoni, bese kuba umugqa omesha iphethini.
Ngiwucinga kanjani umbhalo kuwo wonke amafayela ku-Linux?
Gweba iyithuluzi le-Linux / Unix lomugqa womyalo 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.
Ngiwuthola kanjani umyalo we-grep ku-Unix?
Ukuyisebenzisa thayipha grep , bese iphethini esiseshayo futhi ekugcineni igama lefayela (noma amafayela) esisesha kulo. Okukhiphayo yimigqa emithathu efayeleni equkethe izinhlamvu 'hhayi'. Ngokuzenzakalelayo, i-grep isesha iphethini ngendlela ezwelayo.
Ngiyihlanganisa kanjani imiyalo emibili ye-grep?
Amathuba amabili:
- Amaqembu: { grep 'substring1' file1.txt grep 'substring2' file2.txt } > outfile.txt. …
- Sebenzisa isisetshenziswa esisetshenziswayo sokuqondisa kabusha >> ekuqondiseni kabusha kwesibili: grep 'substring1' file1.txt > outfile.txt grep 'substring2' file2.txt >> outfile.txt.
Uzenza kanjani izinhlamvu ezikhethekile?
Ukufanisa umlingisi okhethekile ku-grep -E, beka i-backslash ( ) phambi komlingiswa. Ngokuvamile kulula ukusebenzisa i-grep –F uma ungadingi ukufaniswa kwephethini okukhethekile.
Ingabe i-Fgrep ishesha kune-grep?
Ingabe i-grep esheshayo iyashesha? Umbuso we-grep usesha amafayela ombhalo ukuze uthole izinkulumo ezivamile, kodwa ungasesha amayunithi ezinhlamvu ajwayelekile njengoba lezi zintambo ziyisimo esikhethekile sezinkulumo ezivamile. Kodwa-ke, uma izinkulumo zakho ezivamile empeleni ziyizinhlamvu zombhalo, fgrep ingase isheshe kakhulu kune-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. Ngamanye amazwi, umyalo we-grep usesha ifayela elinikeziwe ukuze uthole imigqa equkethe okufanayo neyunithi yezinhlamvu enikeziwe noma amagama. Kungomunye wemiyalo ewusizo kakhulu ku-Linux kanye nohlelo olufana ne-Unix lonjiniyela nama-sysadmins.