Njira Yowonjezera Yogwiritsira Ntchito Malamulo Omwe Ali M'dongosolo la Linux

Chiyambi cha Linux chidalamulira

Maofesi a Linux amagwiritsira ntchito malamulo omaliza kuti agwire ntchito ndi mafayilo a kompyuta. Ntchito yaikulu ya lamulo la Linux sed , yomwe ili yochepa kwa editor, ikusintha mzere uliwonse wa fayilo kapena mtsinje mwa kuchotsa mbali zina za mzerewu. Zimapangitsa kuti malemba apamwamba asinthidwe ku fayilo kapena zolembedwera kuchokera ku bomba. Mwachitsanzo, mukuti muli ndi fayela yotchedwa "nyimbo.text" yomwe ili ndi mizere iyi:

1, Justin Timberlake, Mutu 545, Mtengo $ 6.30 2, Taylor Swift, Mutu 723, Mtengo $ 7.90 3, Mick Jagger, Mutu 610, Mtengo $ 7,90 4, Lady Gaga, Mutu 118, Mtengo $ 6.30 5, Johnny Cash, Mutu 482, Mtengo $ 6.50 6, Elvis Presley, Mutu 335, Mtengo $ 6.30 7, John Lennon, Mutu 271, Mtengo $ 7.90

Kupanga Malemba Kudzakhala Ndi Sed

Ngati mukufuna kusintha malonda onse a $ 6.30 mpaka $ 7.30, mukhoza kusintha pogwiritsira ntchito sed sed command motere:

sed 's / 6.30 / 7.30 /' nyimbo.txt> nyimbo2.txt

Code iyi imapanga kusintha ndikulemba fayilo yosinthidwa ku "nyimbo2.txt". Fayilo yotulutsira ili ndi:

1, Justin Timberlake, mutu 545, Mtengo $ 7.30 2, Taylor Swift, Mutu 723, Mtengo $ 7,90 3, Mick Jagger, Mutu 610, Mtengo $ 7,90 4, Lady Gaga, Mutu 118, Mtengo $ 7.30 5, Johnny Cash, Mutu $ 6.50 6, Elvis Presley, Mutu 335, Mtengo $ 7.30 7, John Lennon, Mutu 271, Mtengo $ 7.90

Ngati mukufuna kusintha zochitika zonse za "Cash" ndi "Tchire" yomwe mumagwiritsa ntchito:

sed 's / Cash / Trash /' nyimbo.txt> nyimbo2.txt

zomwe zimapanga fayilo ndi zokhutira:

1, Justin Timberlake, mutu 545, Mtengo $ 7: 30 2, Taylor Swift, Mutu 723, Mtengo $ 7,90 3, Mick Jagger, Mutu 610, Mtengo $ 7.90 4, Lady Gaga, Mutu 118, Mtengo $ 7: 30 5, Johnny Trash, Mutu 482, Mtengo $ 6.50 6, Elvis Presley, Mutu 335, Mtengo $ 7: 30 7, John Lennon, Mutu 271, Mtengo $ 7.90

Kuwonetsa Ndidongosolo Loti

Sed ikugwiritsidwanso ntchito mobwerezabwereza kufuta mzere mu fayilo kapena mtsinje. Mwachitsanzo, ngati mukufuna kuwona mizere yomwe ili ndi "John," mumagwiritsa ntchito:

sed -n '/ John / p' nyimbo.txt> johns.txt

amene amalemba mzere wotsatira kuti afikitse johns.txt:

5, Johnny Trash, Mutu 482, Mtengo $ 6.50 7, John Lennon, Mutu 271, Mtengo $ 7.90