The grep filter searches a file for a particular pattern of characters, and displays all lines that contain that pattern. The pattern that is searched in the file is referred to as the regular expression (grep stands for globally search for regular expression and print out).
Yini ukusetshenziswa komyalo we-grep?
I-Grep iyithuluzi lomugqa womyalo we-Linux / Unix esetshenziselwa 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.
Why is grep important?
Grep is a very important & powerful Linux commands. It stands for ‘Global Regular Expression Print’ & is used for matching & printing a search pattern or a regular expression from a single or multiple text files.
Ngilifaka kanjani ifayela ku-Linux?
Umyalo we-grep usesha ifayela, ufuna okufanayo nephethini eshiwo. Ukuyisebenzisa thayipha grep , bese kuba iphethini esiseshayo kanye ekugcineni igama lefayela (noma amafayela) siyaphenya. Okukhiphayo yimigqa emithathu efayeleni equkethe izinhlamvu 'hhayi'.
Iyini inhloso ku-Unix?
I-Unix iyisistimu yokusebenza. It isekela ukwenza izinto eziningi nokusebenza kwabasebenzisi abaningi. I-Unix isetshenziswa kakhulu kuzo zonke izinhlobo zezinhlelo zekhompiyutha ezifana nedeskithophu, ilaptop, namaseva. Ku-Unix, kune-Graphical interface yomsebenzisi efana namawindi asekela ukuzulazula okulula nendawo esekelayo.
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.
Ubala kanjani i-grep?
Ukusebenzisa i-grep -c kukodwa kuzobala inani lemigqa equkethe igama elifanayo esikhundleni senani lengqikithi yokufanisa. Inketho ye-o yilokho okutshela u-grep ukuthi akhiphe umdlalo ngamunye emugqeni oyingqayizivele bese u-wc -l etshela i-wc ukuthi ibale inani lemigqa. Yile ndlela inani eliphelele lamagama ameshayo litholwa ngayo.
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.
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.
Uyini umphumela womyalo kabani?
Incazelo: ubani owayala ukuphuma imininingwane yabasebenzisi okwamanje abangene ngemvume ohlelweni. Okukhiphayo kuhlanganisa igama lomsebenzisi, igama letheminali (angena kulo), usuku kanye nesikhathi sokungena kwabo njll. 11.