Impendulo eKhawulezayo: Ndiyibonisa njani iilayini ezili-10 zokuqala zefayile kwiLinux?

Ukujonga kwilayini ezimbalwa zokuqala zefayile, chwetheza igama lefayile, apho igama lefayile ligama lefayile ofuna ukuyijonga, uze ucinezele. . Ngokungagqibekanga, intloko ikubonisa iilayini ezili-10 zokuqala zefayile. Ungatshintsha oku ngokuchwetheza intloko -number igama lefayile, apho inani linani lelayini ofuna ukuyibona.

Ndiyifunda njani imigca eli-10 yokuqala yefayile kwiLinux?

Chwetheza lo myalelo wentloko ulandelayo ukubonisa iilayini ezili-10 zokuqala zefayile ebizwa ngokuba "bar.txt":

1. intloko -10 bar.txt.
2. intloko -20 bar.txt.
3. sed -n 1,10p /etc/group.
4. sed -n 1,20p /etc/group.
5. awk 'FNR <= 10' /etc/passwd.
6. awk 'FNR <= 20' /etc/passwd.
7. perl -ne'1..10 kwaye uprinte' /etc/passwd.
8. perl -ne'1..20 kwaye uprinte' /etc/passwd.

18 kwiintsuku. Ngo-2018

Ngowuphi umyalelo osetyenziswayo ukubonisa iilayini ezili-10 zokuqala zefayile?

Umyalelo wentloko, njengoko igama lisitsho, printa inani eliphezulu le-N ledatha yegalelo elinikiweyo. Ngokungagqibekanga, iprinta iilayini ezili-10 zokuqala zeefayile ezikhankanyiweyo. Ukuba ngaphezu kwegama elinye lefayile linikezelwe ngoko idatha kwifayile nganye ilandelwa igama layo lefayile.

Uyigreyitha njani imigca eli-10 yokuqala?

intloko -n10 igama lefayile | grep ... intloko iya kukhupha imigca eli-10 yokuqala (usebenzisa i -n ukhetho), kwaye ke ungabhobhoza eso siphumo kwi grep . Ungasebenzisa umgca olandelayo: intloko -n 10 /path/to/file | grep […]

Ndiyibona njani imigca eli-10 yokugqibela yefayile kwiLinux?

Linux umsila womyalelo wesintaksi

Umsila ngumyalelo oshicilela inani lokugqibela lelayini (imigca eli-10 ngokungagqibekanga) yefayile ethile, emva koko iyayiphelisa. Umzekelo 1: Ngokungagqibekanga “umsila” uprinta imigca eli-10 yokugqibela yefayile, uze uphume. njengoko ubona, oku kuprinta imigca eli-10 yokugqibela ye/var/log/messages.

Ndilazi njani iqokobhe lam langoku?

Indlela yokukhangela ukuba leliphi iqokobhe endilisebenzisayo: Sebenzisa le miyalelo ilandelayo yeLinux okanye yeUnix: ps -p $$ – Bonisa igama lakho langoku leqokobhe ngokuthembekileyo. echo "$SHELL" - Shicilela iqokobhe lomsebenzisi wangoku kodwa hayi iqokobhe elisebenzayo kwintshukumo.

Ndizikopa njani iifayile zokuqala ezili-10 kwiUNIX?

Khuphela iifayile ze-n zokuqala ukusuka kolunye ulawulo ukuya kwelinye

1. fumana . – ubunzulu 1 -udidi f | intloko -5 | xargs cp -t /target/directory. Oku kujongeka kuthembisa, kodwa kusilele kuba osx cp umyalelo awubonakali une. -t tshintsha.
2. yenza kuqwalaselo olumbalwa olwahlukileyo. Oku mhlawumbi kusilele kwiingxaki zesintaksi ekupheleni kwam : / andikhange ndibonakale ndifumana ukhetho lwentloko olusebenzayo.

13 сент. Ngo-2018

Ngowuphi umyalelo osetyenziswayo ukuchonga iifayile?

Umyalelo wefayile usebenzisa ifayile /etc/magic ukuchonga iifayile ezinenombolo yomlingo; oko kukuthi, nayiphi na ifayile equlathe amanani okanye umtya ongatshintshiyo obonisa uhlobo. Oku kubonisa udidi lwefayile ye-myfile (efana nolawulo, idatha, umbhalo we-ASCII, umthombo wenkqubo we-C, okanye uvimba).

Yintoni umyalelo wentloko?

Umyalelo wentloko sisixhobo somgca womyalelo wokukhupha inxalenye yokuqala yeefayile ezinikwe yona ngegalelo eliqhelekileyo. Ibhala iziphumo kwimveliso eqhelekileyo. Ngokungagqibekanga intloko ibuyisela imigca elishumi yokuqala yefayile nganye enikiweyo.

Ndiyijonga njani ifolda?

Udwelisa Njani Iizalathisi kuphela kwiLinux

1. Uluhlu lwezalathisi usebenzisa i-Wildcards. Eyona ndlela ilula kukusebenzisa i-wildcards. …
2. Ukusebenzisa -F ukhetho kunye ne-grep. Ukhetho lwe -F ludibanisa isilayishi esisemva esisemva. …
3. Ukusebenzisa -l ukhetho kunye ne-grep. Kuluhlu olude lwe ls ie ls -l , singakwazi 'grep' imigca eqala ngo d . …
4. Ukusebenzisa umyalelo we-echo. …
5. Ukusebenzisa printf. …
6. Ukusebenzisa ukufumana umyalelo.

Ezingama-2. 2012 г.

Uyilungisa njani imigca embalwa?

Kwi-BSD okanye i-GNU grep ungasebenzisa -B num ukuseta ukuba mingaphi na imigca phambi komdlalo kunye nenani lemigca emva komdlalo. Ukuba ufuna inani elifanayo lelayini phambi nasemva ungasebenzisa -C num . Oku kuya kubonisa imigca emi-3 phambi kunye nemigca emi-3 emva koko.

Wenza ntoni umyalelo wekati?

Umyalelo 'wekati' [mfutshane othi “concatenate”] ngomnye wemiyalelo esetyenziswa rhoqo kwiLinux nakwezinye iinkqubo zokusebenza. Umyalelo wekati usivumela ukuba senze iifayile enye okanye ezininzi, ukujonga kuqulethe ifayile, iifayile ezihambelanayo kunye nokuphuma kwakhona kwi-terminal okanye iifayile.

Wenza ntoni umyalelo we-grep?

I-grep sisixhobo somgca womyalelo wokukhangela iiseti zedatha yokubhaliweyo okucacileyo kwelayini ehambelana nentetho eqhelekileyo. Igama layo livela kumyalelo we-ed g/re/p (ihlabathi jikelele phendla intetho eqhelekileyo kunye noshicilelo oluthelekisekayo imigca), enesiphumo esifanayo.

Ndiwubonisa njani umgca wefayile kwi Unix?

Amanqaku Afana

1. awk : $>awk '{ukuba(NR==LINE_NUMBER) shicilela $0}' file.txt.
2. sed : $>sed -n LINE_NUMBERp file.txt.
3. intloko : $>intloko -n LINE_NUMBER ifayile.txt | umsila -n + LINE_NUMBER Apha LINE_NUMBER yi, yeyiphi inombolo yomgca ofuna ukuyiprinta. Imizekelo: Shicilela umgca kwifayile enye.

26 сент. Ngo-2017

Yintoni inkqubo yokubala inani labalinganiswa kunye nemigca kwifayile?

Umyalelo othi “wc” ngokusisiseko uthetha “ubalo lwamagama” kunye neeparamitha ezahlukeneyo ozikhethelayo umntu unokuzisebenzisa ukubala inani lemigca, amagama, kunye noonobumba kwifayile yokubhaliweyo. Ukusebenzisa i-wc ngaphandle kokhetho kuzakufumana amanani ee-bytes, iilayini, namagama (-c, -l kunye no -w ukhetho).

Uyenza njani ifayile kwiLinux?

1. Ukwenza iiFayile zeLinux eziNtsha kwiLayini yoMyalelo. Yenza iFayile ngomyalelo wokuTofa. Yenza iFayile eNtsha ngoMsebenzi oKhombise kwakhona. Yenza iFayile ngomyalelo wekati. Yenza iFayile ngomyalelo we-echo. Yenza iFayile ngomyalelo weprintf.
2. Ukusebenzisa abahleli bombhalo ukwenza iFayile yeLinux. Vi Isihleli sombhalo. Umhleli wombhalo weVim. Umhleli Wombhalo weNano.

27 июн. Ngo-2019