Kuti muwone mizere yoyambirira ya fayilo, lembani dzina la fayilo, pomwe filename ndi dzina la fayilo yomwe mukufuna kuyang'ana, kenako dinani.
Kodi mumawerenga bwanji mzere woyamba wa fayilo mu Unix shell script?
Kuti musunge mzere wokha, gwiritsani ntchito var=$(command) mawu ofotokozera. Pamenepa, mzere=$(awk 'NR==1 {print; exit}' file) . Ndi mzere wofanana=$(sed -n '1p' file) . sed '1!d;q' (kapena sed -n '1p;q' ) idzatsanzira malingaliro anu a awk ndikuletsa kuwerenganso mufayilo.
Kodi mumawerengera bwanji mizere itatu yoyamba ku Unix?
4 Mayankho. Chiwerengero 28 zikuwoneka ngati chiwerengero chomwe mungapeze pamizere itatu yoyambirira ya mawu omwe mwapatsidwa ngati mugawa mawu ndi mipata, mizere, ndi ma slashes.
Kodi mumalumpha bwanji mizere ingapo yoyamba mu Unix?
Ndiye kuti, ngati mukufuna kudumpha mizere ya N, mumayamba mzere wosindikiza N+1. Chitsanzo: $ tail -n +11 /tmp/myfile </tmp/myfile, kuyambira pa mzere 11, kapena kudumpha mizere 10 yoyamba. >
Kodi ndimawerenga bwanji mzere woyamba wa fayilo?
Njira ina yowerengera mzere woyamba wa fayilo ndikugwiritsa ntchito ntchito yowerengera () yomwe imawerenga mzere umodzi kuchokera pamtsinje. Zindikirani kuti timagwiritsa ntchito rstrip () ntchito kuchotsa mzere watsopano kumapeto kwa mzere chifukwa readline () imabweretsa mzerewo ndi mzere watsopano.
Kodi mumawerenga bwanji fayilo ku Unix?
Momwe Mungawerengere Fayilo Mzere Ndi Mzere ku Bash. Fayilo yolowetsa ( $input) ndi dzina la fayilo yomwe mukufuna kugwiritsa ntchito ndi lamulo lowerengera. Lamulo lowerenga limawerenga mzere wa fayilo ndi mzere, ndikugawira mzere uliwonse ku $line bash shell variable. Mizere yonse ikawerengedwa kuchokera pafayilo bash pomwe loop imayima.
Kodi mumawerengera bwanji kuchuluka kwa mizere mu fayilo ya Unix?
Momwe Mungawerengere mizere mu fayilo mu UNIX / Linux
- Lamulo la "wc -l" likathamanga pa fayiloyi, limatulutsa chiwerengero cha mzere pamodzi ndi dzina la fayilo. $ wc -l file01.txt 5 file01.txt.
- Kuti muchotse dzina lafayilo pazotsatira, gwiritsani ntchito: $ wc -l <file01.txt 5.
- Mutha kupereka nthawi zonse zotuluka ku lamulo la wc pogwiritsa ntchito chitoliro. Mwachitsanzo:
Kodi ndimawerengera bwanji mizere mufayilo?
Chida wc ndi "mawu owerengera" mu UNIX ndi UNIX-monga machitidwe opangira, koma mutha kuchigwiritsanso ntchito kuwerengera mizere mu fayilo ndi kuwonjezera njira -l. wc -l foo adzawerengera kuchuluka kwa mizere mu foo .
Ndi mizere ingati yomwe imafayilo Linux?
Njira yosavuta yowerengera kuchuluka kwa mizere, mawu, ndi zilembo mufayilo yamalemba ndi gwiritsani ntchito lamulo la Linux "wc" mu terminal. Lamulo la "wc" kwenikweni limatanthauza "kuwerengera mawu" ndipo ndi magawo osiyanasiyana osasankha munthu atha kuligwiritsa ntchito kuwerengera mizere, mawu, ndi zilembo mufayilo yamawu.