Uwuthola kanjani umugqa we-nth ku-Unix?

Ngiyithola kanjani inombolo yomugqa ku-Unix?

Uma usuvele uku-vi, ungasebenzisa umyalo we-goto. Ukuze wenze lokhu, cindezela u-Esc , thayipha inombolo yomugqa, bese cindezela u-Shift-g . Uma ucindezela u-Esc bese u-Shift-g ngaphandle kokucacisa inombolo yomugqa, kuzokuyisa kulayini wokugcina efayelini.

Ulithola kanjani igama le-nth lomugqa ku-Linux?

Okufanele ukwenze ukuze uthole igama elithi n-th emgqeni khipha umyalo olandelayo:ukusika -f -d' ”-d' switch iyatshela [sika] mayelana nokuthi yini i-delimiter (noma isihlukanisi) efayelini, okuyisikhala '' kulokhu. Ukube isihlukanisi bekungukhefana, ngabe sibhale u-d',' ngaleso sikhathi.

Ngiwuphrinta kanjani umugqa we-nth wefayela?

U-N inombolo yomugqa oyifunayo. Isibonelo, okokufaka komsila -n+7. txt | ikhanda -1 lizophrinta umugqa wesi-7 wefayela.
...

1. umsila -n+N | ikhanda -1 : 3.7 isekhondi.
2. ikhanda -N | umsila -1 : 4.6 isekhondi.
3. sed Nq;d : 18.8 sec.

Ngiwenza kanjani umugqa kusuka kufayela?

Umyalo we-grep usesha ifayela, ufuna okufanayo nephethini eshiwo. Ukuyisebenzisa thayipha grep , bese kuba iphethini esiseshayo kanye ekugcineni igama lefayela (noma amafayela) esicinga kuwo. Okukhiphayo yimigqa emithathu efayeleni equkethe izinhlamvu ezithi 'hhayi'.

Yini i-awk NR?

Awk NR ikunikeza inani eliphelele lamarekhodi acutshungulwayo noma inombolo yomugqa. Esibonelweni esilandelayo se-awk NR, okuguquguqukayo kwe-NR kunenombolo yomugqa, esigabeni esithi END i-awk NR ikutshela inani eliphelele lamarekhodi efayeleni.

Kuyini ukusetshenziswa kwe-awk ku-Linux?

I-Awk iyinsiza eyenza umhleli akwazi ukubhala izinhlelo ezincane kodwa eziphumelelayo ngendlela yezitatimende ezichaza amaphethini ombhalo okufanele aseshwe kulayini ngamunye wedokhumenti kanye nesenzo okufanele sithathwe lapho okufanayo kutholakala ngaphakathi umugqa. I-Awk isetshenziswa kakhulu ukuskena iphethini nokucubungula.

Ngiphrinta kanjani i-awk?

Ukuze uphrinte umugqa ongenalutho, sebenzisa ukuphrinta "", lapho "" intambo engenalutho. Ukuze uphrinte ucezu olugxilile lombhalo, sebenzisa iyunithi yezinhlamvu engaguquki, njengokuthi “Ungathuki” , njengento eyodwa. Uma ukhohlwa ukusebenzisa izinhlamvu zokucaphuna kabili, umbhalo wakho uthathwa njengesisho esingesihle, futhi cishe uzothola iphutha.

Wenzani i-awk ku-bash?

I-AWK iwulimi lokuhlela okuwukuthi yakhelwe ukucubungula idatha esekwe embhalweni, kungaba kumafayela noma ekusakazweni kwedatha, noma kusetshenziswa amapayipi egobolondo. Ngamanye amazwi ungahlanganisa i-awk nemibhalo yegobolondo noma usebenzise ngokuqondile kusheshi wegobolondo. Lawa makhasi akhombisa indlela yokusebenzisa i-awk kumaskripthi akho e-bash shell.

Ngiwuphrinta kanjani umugqa usuka efayeleni ku-Linux?

Bhala i-bash script ukuze uphrinte umugqa othile efayeleni

1. awk : $>awk '{if(NR==LINE_NUMBER) phrinta $0}' file.txt.
2. sed : $>sed -n LINE_NUMBERp file.txt.
3. ikhanda : $>head -n LINE_NUMBER file.txt | umsila -n + LINE_NUMBER Nansi i-LINE_NUMBER, iyiphi inombolo yomugqa ofuna ukuyiphrinta. Izibonelo: Phrinta umugqa kusuka efayeleni elilodwa.

Imuphi umyalo ozophrinta yonke imigqa efayelini?

Imigqa Yokuphrinta Efayeleni kusetshenziswa i-sed

sed “p” umyalo isivumela ukuthi siphrinte imigqa ethile ngokusekelwe kunombolo yomugqa noma i-regex enikeziwe. sed ngenketho -n izocindezela ukuphrinta okuzenzakalelayo kwebhafa/isikhala sephethini.

Ngiwuphrinta kanjani umugqa wesibili ku-Unix?

3 Izimpendulo. umsila ubonisa umugqa wokugcina wokuphuma kwekhanda futhi umugqa wokugcina wokuphuma kwekhanda umugqa wesibili wefayela. PS: Maqondana nokuthi "yini engalungile 'ngekhanda|msila' wami" umyalo - shelltel kulungile.

Ngiwathola kanjani amafayela aphezulu ayi-10 ku-Linux?

Imiyalo Yokuthola Amafayela Akulu Kakhulu E-Linux

1. I-oda -h inketho: ukubonisa amafayela wefomethi kufomethi efundwa ngabantu, kuma-Kilobytes, Megabytes namaGigabytes.
2. ye-oda -s inketho: Bonisa inani lempikiswano ngayinye.
3. du umyalo -x inketho: Yeqa izinkomba. …
4. Hlunga umyalo -okhetho: Shintsha umphumela wokufanisa.

Ngiwenza kanjani uhlu lwamafayela ayi-10 okuqala ku-Linux?

The Umyalo we-ls ngisho unezinketho zalokho. Ukufaka ohlwini amafayela emigqeni embalwa ngangokunokwenzeka, ungasebenzisa -format=comma ukuze uhlukanise amagama amafayela ngokhefana njengakulo myalo: $ ls -format=comma 1, 10, 11, 12, 124, 13, 14, 15, 16pgs-indawo.

Ngiwubonisa kanjani umugqa ophakathi ku-Linux?

Umyalo "ikhanda" isetshenziselwa ukubuka imigqa ephezulu yefayela futhi umyalo othi "umsila" usetshenziselwa ukubuka imigqa ekugcineni.