E faʻafefea ona ou mauaina laina muamua 100 i Linux?
Fa'aigoa le fa'atonuga ulu e fa'aalia ai laina muamua e 10 o se faila e ta'ua "bar.txt":
- ulu -10 bar.txt.
- ulu -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 ma lolomi' /etc/passwd.
- perl -ne'1..20 ma lolomi' /etc/passwd.
Tesema 18. 2018 g.
E faʻafefea ona ou faʻaalia laina muamua 10 o se faila i Linux?
Ina ia va'ai i nai laina muamua o se faila, fa'aigoa ulu igoa faila, lea o le igoa faila o le igoa o le faila e te mana'o e va'ai i ai, ona omi lea. . I le faaletonu, ulu e faʻaali atu ia te oe laina muamua 10 o se faila. E mafai ona e suia lenei mea e ala i le taina o le ulu -numera filename, lea o le numera o le numera o laina e te manaʻo e vaʻaia.
E faʻafefea ona ou grep le laina muamua o se faila i Linux?
ulu -n10 igoa faila | grep ... ulu o le a faʻaalia laina muamua 10 (faʻaaogaina le -n filifiliga), ona mafai lea ona e paipa lena gaioiga i grep . E mafai ona e fa'aogaina le laina lea: ulu -n 10 /path/to/file | grep […]
E faʻafefea ona e mauaina se laina i se faila i Linux?
Grep o se meafaigaluega laina laina Linux / Unix faʻaaogaina e suʻe ai se manoa o mataʻitusi i se faila faʻapitoa. O le mamanu su'esu'e tusitusiga e ta'ua o se fa'aaliga masani. A maua se fetaui, e lolomi le laina ma le taunuuga. O le grep command e faʻaaogaina pe a suʻesuʻe i faila faila tetele.
E faʻafefea ona ou faʻaalia le numera o laina i se faila i Unix?
Fa'afefea ona faitau laina ile faila ile UNIX/Linux
- O le "wc -l" poloaiga pe a taʻavale i luga o lenei faila, faʻaalia le numera laina faʻatasi ma le igoa faila. $ wc -l faila01.txt 5 faila01.txt.
- Ina ia aveese le igoa faila mai le taunuuga, faaaoga: $ wc -l <file01.txt 5.
- E mafai lava ona e tu'uina atu le fa'atonuga i le fa'atonuga wc fa'aaoga paipa. Faataitaiga:
E faʻafefea ona ou kopiina laina mulimuli 10 i Linux?
1. faitau le numera o laina i totonu o le faila, fa'aaoga le `cat f. txt | wc -l` ona fa'aaoga lea o le ulu ma le si'usi'u i se paipa e lolomi ai laina mulimuli 81424 o le faila (laina #totallines-81424-1 i le #totallines).
O le fea poloaiga e faʻaaoga e faʻaalia ai laina muamua 10 o le amataga o le faila?
O le fa'atonuga a le ulu, e pei ona ta'u mai e le igoa, lolomi le pito i luga N numera o fa'amaumauga o mea na tu'uina atu. E le mafai, e lolomi laina muamua 10 o faila faʻamaonia. Afai e sili atu ma le tasi le igoa faila e tu'uina atu fa'amaumauga mai faila ta'itasi e muamua i lona igoa faila.
E faʻafefea ona ou vaʻai i laina mulimuli 10 o se faila i Unix?
Linux tail command syntax
Si'usi'u o se poloaiga e lolomi ai nai numera mulimuli o laina (10 laina e le mafai) o se faila patino, ona faʻamutaina lea. Fa'ata'ita'iga 1: I le lē mafai ona lolomi e le "si'u" laina mulimuli e 10 o se faila, ona alu loa lea. e pei ona e vaʻai, o loʻo lolomi ai laina mulimuli e 10 o /var/log/messages.
O le fea poloaiga e fa'aoga e iloa ai faila?
Pau lava lena! faila faila o se aoga aoga Linux e fuafua ai le ituaiga o faila e aunoa ma se faʻaopoopoga.
E fa'afefea ona ou grep laina e 10?
You can use the -B and -A to print lines before and after the match. Will print the 10 lines before the match, including the matching line itself. And if you need to print 10 lines of leading and trailing output context. -A num –after-context=num Print num lines of trailing context after matching lines.
O le a le faʻaogaina o le awk i Linux?
O le Awk o se aoga e mafai ai e se tagata fai polokalame ona tusia ni polokalame laiti ae aoga i le tulaga o faʻamatalaga e faʻamalamalamaina ai mamanu o tusitusiga e tatau ona suʻeina i laina taʻitasi o se pepa ma le gaioiga e tatau ona faia pe a maua se fetaui i totonu o se. laina. O le Awk e masani ona faʻaaogaina mo le suʻesuʻeina o mamanu ma le gaioiga.
E fa'afefea ona e mauaina ni nai laina?
Mo BSD poʻo le GNU grep e mafai ona e faʻaogaina -B num e seti ai le tele o laina aʻo leʻi oʻo i le taʻaloga ma le -A num mo le numera o laina pe a uma le taʻaloga. Afai e te manaʻo i le numera tutusa o laina muamua ma pe a uma ona e faʻaogaina -C num . O le a fa'aalia ai laina 3 i luma ma laina 3 mulimuli ane.
E faʻafefea ona ou grep se laina i se faila?
O le grep command e suʻesuʻe i le faila, suʻe mo fetaui ma le mamanu ua faʻamaonia. Ina ia faʻaaogaina le ituaiga grep , ona sosoo ai lea ma le mamanu o loʻo matou sailia ma mulimuli ane le igoa o le faila (poʻo faila) o loʻo matou suʻeina i totonu. O le gaioiga o laina e tolu i le faila o loʻo i ai mataitusi 'leai'
E faʻafefea ona ou mauaina se faila i Linux?
E te manaʻomia le faʻaogaina o le find command. E faʻaaogaina e suʻe faila ile Linux poʻo le Unix-like system. Ole locate command ole a su'esu'e ile fa'amaumauga tu'ufa'atasia o faila na fa'atupuina e updatedb. O le su'esu'ega o le a su'e faila faila mo faila e fetaui ma tulaga su'esu'e.
E faʻafefea ona ou suʻeina tusitusiga i faila uma i Linux?
Ina ia suʻe faila o loʻo i ai faʻamatalaga patino i Linux, fai mea nei.
- Tatala lau app terminal e sili ona e fiafia iai. XFCE4 terminal o lo'u lava fiafiaga.
- Su'e (pe a mana'omia) i le pusa o lo'o e su'e ai faila ma ni tusitusiga patino.
- Tusi le poloaiga lenei: grep -iRl "lau-tusi-e-saili" ./
4 po. 2017 г.