Kodi ndimapeza bwanji mizere 100 yoyamba mu Linux?
Lembani mutu wotsatira kuti muwonetse mizere 10 yoyamba ya fayilo yotchedwa "bar.txt":
- mutu -10 bar.txt.
- mutu -20 bar.txt.
- sed -n 1,10p /etc/group.
- sed -n 1,20p /etc/group.
- awk 'FNR <= 10' /etc/passwd.
- awk 'FNR <= 20' /etc/passwd.
- perl -ne'1..10 ndi kusindikiza' /etc/passwd.
- perl -ne'1..20 ndi kusindikiza' /etc/passwd.
18 дек. 2018 g.
Kodi ndimawonetsa bwanji mizere 10 yoyamba ya fayilo mu Linux?
Kuti muwone mizere yoyambirira ya fayilo, lembani dzina la fayilo, pomwe filename ndi dzina la fayilo yomwe mukufuna kuyang'ana, kenako dinani. . Mwachikhazikitso, mutu umakuwonetsani mizere 10 yoyamba ya fayilo. Mutha kusintha izi polemba mutu -number filename, pomwe nambala ndi mizere yomwe mukufuna kuwona.
Kodi ndimayika bwanji mzere woyamba wa fayilo mu Linux?
mutu -n10 filename | grep ... mutu utulutsa mizere 10 yoyamba (pogwiritsa ntchito -n), ndiyeno mutha kuyika zotulukazo kuti grep . Mutha kugwiritsa ntchito mzere wotsatirawu: mutu -n 10 /path/to/file | grep […]
Kodi mumapeza bwanji mzere mufayilo mu Linux?
Grep ndi chida cha mzere wa Linux / Unix chomwe chimagwiritsidwa ntchito kufufuza mndandanda wa zilembo mufayilo yodziwika. Njira yosakira mawu imatchedwa mawu okhazikika. Ikapeza chofanana, imasindikiza mzere ndi zotsatira zake. Lamulo la grep ndi lothandiza mukasaka mafayilo akulu a log.
Kodi ndimawonetsa bwanji kuchuluka kwa mizere mufayilo ku 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 ndimakopera bwanji mizere 10 yomaliza ku Linux?
1. kuwerengera kuchuluka kwa mizere mufayilo, pogwiritsa ntchito `mphaka f. txt | wc -l` kenako kugwiritsa ntchito mutu ndi mchira posindikiza mizere yomaliza 81424 ya fayilo (mizere #totallines-81424-1 mpaka #totallines).
Ndi lamulo liti lomwe limagwiritsidwa ntchito kuwonetsa mizere 10 yoyambira fayilo?
Lamulo lamutu, monga dzina limatanthawuzira, sindikizani nambala yapamwamba ya N ya deta yomwe mwapatsidwa. Mwachikhazikitso, imasindikiza mizere 10 yoyamba ya mafayilo otchulidwa. Ngati mafayilo opitilira limodzi aperekedwa ndiye kuti data kuchokera pafayilo iliyonse imatsogozedwa ndi dzina lake lafayilo.
Kodi ndimawona bwanji mizere 10 yomaliza ya fayilo ku Unix?
Linux tail command syntax
Mchira ndi lamulo lomwe limasindikiza mizere ingapo yomaliza (mizere 10 mwachisawawa) ya fayilo inayake, kenako ndikumaliza. Chitsanzo 1: Mwachikhazikitso "mchira" umasindikiza mizere 10 yomaliza ya fayilo, ndikutuluka. monga mukuwonera, izi zimasindikiza mizere 10 yomaliza ya /var/log/messages.
Ndi lamulo liti lomwe limagwiritsidwa ntchito kuzindikira mafayilo?
Ndizomwezo! file command ndi chida chothandiza cha Linux kudziwa mtundu wa fayilo popanda kuwonjezera.
Kodi ndimapanga bwanji mizere 10 yotsatira?
Mutha kugwiritsa ntchito -B ndi -A kusindikiza mizere isanachitike komanso itatha machesi. Isindikiza mizere 10 masewerawo asanachitike, kuphatikiza mzere wofananira womwe. Ndipo ngati mukufuna kusindikiza mizere 10 yotsogolera komanso yotsatsira. -A num -after-context=nambala Sindikizani mizere yotsatira pambuyo pofananiza mizere.
Kodi kugwiritsa ntchito awk mu Linux ndi chiyani?
Awk ndi chida chomwe chimathandizira wopanga mapulogalamu kuti alembe mapulogalamu ang'onoang'ono koma ogwira mtima ngati mawu omwe amatanthauzira zolemba zomwe ziyenera kufufuzidwa pamzere uliwonse wa chikalata ndi zomwe zikuyenera kuchitika pomwe machesi apezeka mkati mwa mzere. Awk imagwiritsidwa ntchito kwambiri pakusanthula ndi kukonza.
Kodi mumayika bwanji mizere ingapo?
Kwa BSD kapena GNU grep mutha kugwiritsa ntchito -B num kuyika mizere ingati masewerawo asanachitike ndi -Nambala pamizere pambuyo pamasewera. Ngati mukufuna mizere yofanana musanayambe kapena mutatha kugwiritsa ntchito -C num . Izi ziwonetsa mizere itatu patsogolo ndi mizere itatu pambuyo pake.
Kodi ndimayika bwanji mzere mufayilo?
Lamulo la grep limafufuza mufayiloyo, kufunafuna zofananira ndi zomwe zafotokozedwa. Kuti mugwiritse ntchito lembani grep , kenaka ndondomeko yomwe tikufufuzayo ndipo potsiriza dzina la fayilo (kapena mafayilo) omwe tikufufuzamo. Zotsatira zake ndi mizere itatu mufayilo yomwe ili ndi zilembo 'ayi'.
Kodi ndimapeza bwanji chikwatu mu Linux?
Muyenera kugwiritsa ntchito find command. Amagwiritsidwa ntchito kupeza mafayilo pa Linux kapena Unix-like system. Lamulo lopeza lisakasaka mu nkhokwe ya mafayilo opangidwa ndi updatedb. Lamulo lopeza lisakasaka mafayilo amoyo pamafayilo omwe amafanana ndi zomwe amasaka.
Kodi ndimasaka bwanji zolemba pamafayilo onse a Linux?
Kuti mupeze mafayilo omwe ali ndi zolemba zenizeni mu Linux, chitani zotsatirazi.
- Tsegulani pulogalamu yomwe mumakonda kwambiri. XFCE4 terminal ndizokonda zanga.
- Yendetsani (ngati pakufunika) kupita ku chikwatu chomwe mukusaka mafayilo ndi mawu enaake.
- Lembani lamulo ili: grep -iRl "your-text-to-find" ./
4 gawo. 2017 g.