How do I print the nth line in 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.
Unoverenga sei mutsara wenth muUnix?
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?
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.
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.
Ini ndinoita sei grep chaiyo mutsara nhamba muLinux?
Iyo -n (kana -line-nhamba) sarudzo tells grep to show the line number of the lines containing a string that matches a pattern. When this option is used, grep prints the matches to standard output prefixed with the line number.
Chii chiri kushandiswa kweawk muLinux?
Awk chinhu chinoshandiswa chinoita kuti mugadziri wepurogiramu anyore zvidiki asi zvinobudirira zvirongwa muchimiro chezvirevo zvinotsanangura mameseji mapatani anofanirwa kutsvakwa mumutsara wega wega wegwaro uye chiito chinofanirwa kutorwa kana mutambo wawanikwa mukati line. Awk inonyanya kushandiswa pattern scanning uye processing.
Ndinotsemura sei tambo mubash?
Mune bash, tambo inogona zvakare kukamurwa pasina kushandisa $IFS kusiyanisa. Iyo 'readarray' yekuraira ine -d sarudzo inoshandiswa kupatsanura tambo data. Iyo -d sarudzo inoshandiswa kutsanangura iyo inoparadzanisa hunhu mukuraira senge $ IFS. Uyezve, iyo bash loop inoshandiswa kudhinda tambo mune yakakamurwa fomu.
Ndeupi murairo uchadhinda mitsetse yese mufaira?
Kudhinda Mitsetse kubva kuFaira uchishandisa sed
sed "p" kuraira ngatidhindei mitsetse chaiyo zvichienderana nenhamba yemutsetse kana regex yakapihwa. sed ine sarudzo -n inodzvinyirira otomatiki kudhinda kwepateni buffer/nzvimbo.
How do I extract a specific line from a text file in Unix?
Kuti utore mitsara yakawanda, taura mitsara 2 kusvika 4, unogona kuita chimwe chezvinotevera:
- $ sed -n 2,4p imwe file. txt.
- $ sed '2,4! d' somefile. txt.
Chii chinonzi NR mune awk command?
NR ndeye AWK yakavakirwa-mukati shanduko uye iyo inoreva nhamba yezvinyorwa zviri kugadziriswa. Kushandiswa: NR inogona kushandiswa mubhokisi rekuita inomiririra nhamba yemutsara uri kugadziriswa uye kana ikashandiswa muEND inogona kudhinda nhamba yemitsara yakanyatsogadziriswa. Muenzaniso : Kushandisa NR kudhinda nhamba yemutsara mufaira uchishandisa AWK.
Ini ndinodhinda sei mutsara chaiwo ndichishandisa sed?
Muchinyorwa ichi che sed nhevedzano, isu tichaona nzira yekudhinda imwe mutsara uchishandisa iyo print(p) command ye sed. Saizvozvo, kudhinda imwe mutsara, isa nhamba yemutsara pamberi pe'p'. $ inoratidza mutsara wekupedzisira. !