Ke hatisa mohala oa nth joang Linux?
M~N with “p” command prints every Nth line starting from line M. For example, 3~2p prints every 2nd line starting from 3rd line as shown below.
U bala mola oa nth joang ho Unix?
N is the line number that you want. For example, tail -n+7 input. txt | head -1 will print the 7th line of the file.
...
- tail -n+N | head -1 : 3.7 sec.
- head -N | tail -1 : 4.6 sec.
- sed Nq;d : 18.8 sec.
How do I print the nth line of a file?
Ngola bash script ho hatisa mola o itseng ho tsoa faeleng
- awk : $>awk '{ha(NR==LINE_NUMBER) hatisa $0}' file.txt.
- sed : $>sed -n LINE_NUMBERp file.txt.
- hlooho : $>hlooho -n LINE_NUMBER file.txt | mohatla -n + LINE_NUMBER Mona LINE_NUMBER ke, nomoro ea mohala eo u batlang ho e hatisa ke efe. Mehlala: Hatisa mola ho tsoa faeleng e le 'ngoe.
Ke hlophisa faele joang ho Linux?
Mokhoa oa ho sebelisa taelo ea grep ho Linux
- Grep Command Syntax: grep [likgetho] PATTERN [FILE…] ...
- Mehlala ea ho sebelisa 'grep'
- grep foo /file/name. …
- grep -i "foo" /file/name. …
- grep 'error 123' /file/name. …
- grep -r "192.168.1.5" /etc/ …
- grep -w "foo" /file/name. …
- egrep -w 'word1|word2' /file/name.
Ke kenya nomoro ea mohala joang ho Linux?
Khetho ea -n (kapa -line-number). e bolella grep ho bonts'a nomoro ea mela ea mela e nang le khoele e ts'oanang le paterone. Ha khetho ena e sebelisoa, grep e hatisa lipapali ho sephetho se tloaelehileng se kentsoeng ka nomoro ea mohala.
Tšebeliso ea awk ho Linux ke efe?
Awk ke sesebelisoa se nolofalletsang moqapi ho ngola mananeo a manyane empa a sebetsa ka mokhoa oa lipolelo tse hlalosang mekhoa ea mongolo e lokelang ho batloa moleng o mong le o mong oa tokomane le ketso e lokelang ho nkuoa ha papali e fumanoa ka har'a mola. Awk e sebelisoa haholo bakeng sa ho lekola mohlala le ho sebetsa.
Nka arola khoele joang ka bash?
Ka bash, khoele e ka boela ea aroloa ntle le ho sebelisa $ IFS e feto-fetohang. Taelo ea 'readarray' ka khetho ea -d e sebelisoa ho arola data ea khoele. Khetho ea -d e sebelisoa ho hlalosa sebopeho sa karohano taelong e kang $ IFS. Ho feta moo, bash loop e sebelisetsoa ho hatisa khoele ka mokhoa o arohaneng.
Ke taelo efe e tla hatisa mela eohle faeleng?
Mela ea ho hatisa ho tsoa Faeleng ka ho sebelisa sed
taelo ea sed “p” e re lumella ho hatisa mela e ikhethileng ho latela nomoro ea mohala kapa regex e fanoeng. sed ka khetho -n e tla hatella khatiso ea othomathiki ea buffer/space.
How do I extract a specific line from a text file in Unix?
Ho ntša letoto la mela, bolela mola oa 2 ho isa ho oa 4, o ka etsa e 'ngoe ea e latelang:
- $ sed -n 2,4p somefile. TXT.
- $ sed '2,4! d' somefile. TXT.
NR ke eng ka taelo ea awk?
NR ke mofuta o hahelletsoeng oa AWK mme e e bolela palo ea lirekoto tse sebetsoang. Ts'ebeliso : NR e ka sebelisoa ho block block e emela palo ea mohala o sebetsoang mme ha e sebelisoa ho END e ka hatisa palo ea mela e sebetsitsoeng ka botlalo. Mohlala : Ho sebelisa NR ho hatisa nomoro ea mohala faeleng u sebelisa AWK.
Ke hatisa mohala o khethehileng joang ke sebelisa sed?
Sengoliloeng sena sa letoto la sed, re tla bona mokhoa oa ho hatisa mohala o itseng o sebelisa print(p) taelo ea sed. Ka mokhoa o ts'oanang, ho hatisa mohala o itseng, beha nomoro ea mohala pele ho 'p'. $ e bontša mola oa ho qetela. !