Ini ndinodhinda sei mutsara wekutanga wefaira muLinux?

Mukati

Ndinoratidza sei mutsara wekutanga wefaira muLinux?

Nyora murairo unotevera wemusoro kuratidza mitsetse gumi yekutanga yefaira inonzi "bar.txt":

musoro -10 bar.txt.
musoro -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 uye print'/etc/passwd.
perl -ne'1..20 uye print'/etc/passwd.

How do I print the first line in Unix?

Yes, that is one way to get the first line of output from a command. There are many other ways to capture the first line too, including sed 1q (quit after first line), sed -n 1p (ingodhinda mutsara wekutanga, asi verenga zvese), awk 'FNR == 1' (ingodhinda mutsara wekutanga, asi zvakare, verenga zvese) nezvimwe.

Ini ndinodhinda sei mutsara kubva pafaira muLinux?

Nyora bash script kudhinda imwe mutsara kubva pafaira

awk : $>awk '{kana(NR==LINE_NUMBER) dhinda $0}' file.txt.
sed : $>sed -n LINE_NUMBERp file.txt.
musoro : $>musoro -n LINE_NUMBER file.txt | muswe -n + LINE_NUMBER Pano LINE_NUMBER ndiyo, nhamba yemutsara yaunoda kudhinda. Mienzaniso: Dhinda mutsara kubva pane imwe faira.

Ndinoverenga sei mutsara wekutanga wefaira?

Shandisa faira. readline() kuverenga mutsara mumwe kubva pafaira

Vhura faira mukuverenga modhi ine syntax yakavhurika (zita refaira, modhi) sefaira: ine modhi se "r" . Fona faira. kuverenga () kuti uwane mutsara wekutanga wefaira uye chengetedza iyi mune inosiyana first_line .

Ndinoratidza sei nhamba yemitsara mufaira muUnix?

Maitiro ekuverenga mitsara mufaira muUNIX / Linux

Iyo "wc -l" yekuraira kana ichimhanya pane iyi faira, inoburitsa mutsara kuverenga pamwe chete nefaira rezita. $ wc -l file01.txt 5 file01.txt.
Kuti usiye zita refaira kubva pamhedzisiro, shandisa: $ wc -l <file01.txt 5.
Iwe unogona kugara uchipa yekuraira kuburitsa kune wc command uchishandisa pombi. Semuyenzaniso:

Ndeupi murairo wekuratidza mitsetse gumi yekutanga yefaira muLinux?

Musoro wekuraira, sezvinoreva zita, dhinda nhamba yepamusoro N yedata reiyo yakapihwa. Nekutadza, inodhinda mitsetse gumi yekutanga yemafaira akatsanangurwa. Kana kupfuura zita refaira rakapihwa ipapo data kubva kune imwe neimwe faira inotungamirwa nezita rayo refaira.

Ini ndinowana sei mutsara wekutanga wefaira muUnix?

Kutarisa mitsetse mishoma yekutanga yefaira, nyora musoro filename, uko filename ndiro zita refaira raunoda kutarisa, wobva wadzvanya . Nekumisikidza, musoro unokuratidza mitsetse gumi yekutanga yefaira. Unogona kushandura izvi nekunyora musoro -number filename, uko nhamba ndiyo nhamba yemitsara yaunoda kuona.

Ndinodhinda sei mutsara wekutanga weawk?

Iyo inotevera `awk` murairo inoshandisa iyo '-F' sarudzo uye chirevo chine chirevo chekudhinda mazita emunyori mushure mekusvetuka mutsara wekutanga. Pano, iyo NR kukosha inoshandiswa mune iyo kana mamiriro. Pano, "Zita reMunyori:nn" richadhindwa semutsara wekutanga pachinzvimbo chezviri kubva pamutsetse wekutanga.

Ndinoita sei grep faira muLinux?

Maitiro ekushandisa iyo grep command muLinux

Grep Command Syntax: grep [sarudzo] PATTERN [FILE…] ...
Mienzaniso yekushandisa 'grep'
grep foo /file/name. …
grep -i "foo" /file/name. …
grep 'kukanganisa 123' /file/name. …
grep -r "192.168.1.5" /etc/ ...
grep -w "foo" /file/name. …
egrep -w 'word1|word2' /file/name.

Ndinoita sei grep mutsara kubva pafaira?

Iwo grep murairo unotsvaga kuburikidza nefaira, uchitsvaga machisi kune pateni yakataurwa. Kuishandisa nyora grep , wobva waita patani yatiri kutsvaga uye pakupedzisira zita refaira (kana mafaera) atiri kutsvaga mukati. Zvakabuda mitsara mitatu iri mufaira ine mavara 'kwete'.

Iwe unowana sei mutsara mune faira Linux?

Kwaziwai iLinux / Unix yekuraira-mutsara chishandiso chinoshandiswa kutsvaga tambo yemavara mune yakatarwa faira. Mavara ekutsvaga manyorerwo anonzi anogara achitaurwa. Kana yawana mechi, inodhinda mutsara nemhedzisiro. Iwo grep murairo unobatsira paunenge uchitsvaga kuburikidza nehombe faira mafaira.

Ini ndinodhinda sei faira muUnix?

Kudhinda Mafaira

The pr Command. Iyo pr command inoita mafomati madiki emafaira pane terminal skrini kana yeprinta. …
Iyo lp uye lpr Mirairo. Iyo yekuraira lp kana lpr inodhinda faira pabepa zvinopesana neiyo skrini inoratidzwa. …
Iyo lpstat uye lpq Mirairo. …
Iyo kanzura uye lprm Mirairo.