Ngiyifunda kanjani imigqa yokuqala eyi-10 yefayela ku-Linux?

Ukubheka imigqa embalwa yokuqala yefayela, thayipha igama lefayela lenhloko, lapho igama lefayela kuyigama lefayela ofuna ukulibuka, bese ucindezela . Ngokuzenzakalelayo, ikhanda likukhombisa imigqa yokuqala eyi-10 yefayela. Ungakushintsha lokhu ngokuthayipha igama lefayela elithi head -number, lapho inombolo iyinombolo yemigqa ofuna ukuyibona.

Ngiyikhombisa kanjani imigqa yokuqala eyi-10 yefayela ku-Linux?

Thayipha umyalo wekhanda olandelayo ukuze ubonise imigqa yokuqala eyi-10 yefayela elibizwa ngokuthi “bar.txt”:

1. ikhanda -10 bar.txt.
2. ikhanda -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 bese uphrinta' /etc/passwd.
8. perl -ne'1..20 bese uphrinta' /etc/passwd.

18 unyaka. 2018 г.

Uyihlanganisa kanjani imigqa yokuqala eyi-10?

Unezinketho ezimbalwa usebenzisa izinhlelo kanye ne-grep . Okulula kakhulu ngombono wami ukusebenzisa ikhanda : head -n10 filename | grep ... ikhanda lizokhipha imigqa yokuqala eyi-10 (usebenzisa inketho ethi -n), bese ungaphayipha lokho okukhiphayo ku-grep .

Imuphi umyalo osetshenziswayo ukubonisa imigqa yokuqala eyi-10 yesiqalo sefayela?

Umyalo wekhanda, njengoba negama lisho, phrinta inombolo ephezulu engu-N yedatha yokokufaka okunikeziwe. Ngokuzenzakalelayo, iphrinta imigqa yokuqala eyi-10 yamafayela ashiwo. Uma kunikezwe igama lefayela elingaphezu kwelilodwa khona-ke idatha evela kufayela ngalinye yandulelwa igama lefayela layo.

Ngiwubuka kanjani umugqa wefayela ku-Linux?

I-Grep iyithuluzi lomugqa womyalo we-Linux / Unix elisetshenziselwa ukucinga uchungechunge lwezinhlamvu efayeleni elishiwo. Iphethini yokusesha umbhalo ibizwa ngokuthi isisho esivamile. Uma ithola okufanayo, iphrinta umugqa nomphumela. Umyalo we-grep uyasebenza lapho usesha amafayela amakhulu welogi.

Ngiyibona kanjani imigqa yokugcina eyi-10 yefayela ku-Unix?

I-syntax yomyalo we-Linux tail

Umsila umyalo ophrinta inombolo yokugcina embalwa yemigqa (imigqa eyi-10 ngokuzenzakalelayo) yefayela elithile, bese uyanqamula. Isibonelo sokuqala: Ngokuzenzakalelayo “umsila” uphrinta imigqa yokugcina eyi-1 yefayela, bese uyaphuma. njengoba ubona, lokhu kuphrinta imigqa yokugcina eyi-10 ye/var/log/messages.

Ngiwakopisha kanjani amafayela okuqala ayi-10 ku-UNIX?

Kopisha amafayela we-n wokuqala usuka kolunye uhla lwemibhalo uye kolunye

1. thola . – ubuningi 1 -hlobo f | ikhanda -5 | xargs cp -t /target/directory. Lokhu kubukeka kuthembisa, kodwa kwehlulekile ngoba umyalo we-osx cp awubonakali une-. - shintsha.
2. sebenzisa ekucushweni okumbalwa okuhlukile. Lokhu cishe kwehlulekile ezinkingeni ze-syntax ekugcineni kwami ​​: / angikwazanga ukuthola ukukhetha kohlobo lwekhanda kusebenza.

13 isiqephu. 2018 g.

Uyihlanganisa kanjani imigqa embalwa?

Ku-BSD noma i-GNU grep ungasebenzisa -B num ukuze usethe ukuthi mingaki imigqa ngaphambi komdlalo kanye -Inani lenombolo yemigqa ngemva komdlalo. Uma ufuna inombolo efanayo yemigqa ngaphambi nangemuva ungasebenzisa -C num . Lokhu kuzobonisa imigqa emi-3 ngaphambi nangemuva kwemi-3.

Wenzani umyalo wekati?

Umyalo 'wekati' [okufushane kokuthi “concatenate”] ungomunye wemiyalo esetshenziswa kakhulu ku-Linux nakwamanye amasistimu wokusebenza. Umyalo wekati usivumela ukuthi sakhe amafayela owodwa noma amaningi, ukubuka okuqukethe ifayela, ukuhlanganisa amafayela futhi siqondise kabusha okukhiphayo kusiphetho noma amafayela.

Wenzani umyalo we-grep?

I-grep iyinsizakalo yomugqa womyalo yokusesha amasethi edatha yombhalo ongenalutho wemigqa ehambisana nesisho esivamile. Igama layo livela ku-ed command g/re/p (sesha emhlabeni wonke isisho esivamile bese uphrinta imigqa emeshayo), onomphumela ofanayo.

Yimuphi umyalo osetshenziselwa ukukhomba amafayela?

Yilokho kuphela! umyalo wefayela uyisisetshenziswa esiwusizo se-Linux sokunquma uhlobo lwefayela ngaphandle kwesandiso.

Uyisebenzisa kanjani imiyalo yekhanda?

Ungayisebenzisa Kanjani I-Head Command

1. Faka umyalo wekhanda, ulandelwe yifayela ongathanda ukulibuka: head/var/log/auth.log. …
2. Ukuze ushintshe inombolo yemigqa ebonisiwe, sebenzisa inketho ethi -n: head -n 50 /var/log/auth.log. …
3. Ukuze ubonise isiqalo sefayela kufika enanini elithile lamabhayithi, ungasebenzisa inketho ethi -c: head -c 1000 /var/log/auth.log.

10 izinyanga. 2017 г.

Ngiyibuka kanjani ifolda?

Uzibhala Kanjani Izikhombisi Kuphela ku-Linux

1. Uhlu lwemibhalo kusetshenziswa i-Wildcards. Indlela elula ukusebenzisa amakhadi asendle. …
2. Ukusebenzisa -F inketho kanye ne-grep. Izinketho ze -F zengeza isisilashi esilandela ngemuva. …
3. Ukusebenzisa -l inketho kanye ne-grep. Kuhlu olude luka- ls okungukuthi ls -l , singakwazi 'grep' imigqa eqala ngo-d . …
4. Ukusebenzisa umyalo we-echo. …
5. Ukusebenzisa i-printf. …
6. Ukusebenzisa umyalo wokuthola.

2 uNovemba. UDisemba 2012

Ngithola kanjani ku-Linux?

i-find iwumyalo wokuhlunga ngokuphindaphindiwe izinto ohlelweni lwefayela ngokusekelwe kumshini onemibandela olula. Sebenzisa okuthi Thola ukucinga ifayela noma uhla lwemibhalo ohlelweni lwakho lwamafayela. Ngokusebenzisa ifulegi -exec, amafayela angatholakala futhi acutshungulwe ngokushesha ngaphakathi komyalo ofanayo.

Ngilithola kanjani igama lefayela ku-Linux?

Izibonelo Eziyisisekelo

1. thola . – qamba leli fayela.txt. Uma udinga ukwazi ukuthi ulithola kanjani ifayela ku-Linux elibizwa ngokuthi leli fayela. …
2. thola /igama lasekhaya *.jpg. Bheka konke. jpg amafayela ku/home kanye nezinkomba ezingezansi kwayo.
3. thola . – thayipha f -akunalutho. Bheka ifayela elingenalutho ngaphakathi kohla lwemibhalo lwamanje.
4. thola /home -user randomperson-mtime 6 -igama “.db”

25 unyaka. 2019 г.

Ngilithola kanjani ifolda ku-Linux?

Udinga ukusebenzisa umyalo wokuthola. Isetshenziselwa ukuthola amafayela ku-Linux noma kusistimu efana ne-Unix. Umyalo we-locate uzosesha kusizindalwazi esakhiwe ngaphambilini samafayela akhiqizwe i-updatedb. Umyalo wokuthola uzocinga isistimu yefayela ebukhoma ukuze uthole amafayela afana nenqubo yokusesha.