Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Get only the 1st and 8th line from every 10 lines Post 302491299 by Franklin52 on Thursday 27th of January 2011 05:59:22 AM
Old 01-27-2011
Code:
awk 'NR%10==1 || NR%10==8' file

 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

replace only 1st word of a line if it comes in the subsequent lines at same postion.

I have a file like this.. Maharastra Mumbai worli Maharastra Mumbai navy maharatra Pune Maharastra Nagpur Karnataka Bangalore Karnataka Mysore Karnataka Mangalore Punjab Amritsar punjab Jalandar my expected outcome should be like this Maharastra Mumbai worli ---------- ... (9 Replies)
Discussion started by: geeko
9 Replies

2. AIX

removing 8th and 9th character of a FILENAME

Hi everyone, I have a file called pdf.txt which has the following list inside: 7110412_1_31122012.pdf 7286510_4_46667100.pdf 4002176_1_00018824.pdf ... I need a looping script to REMOVE the 8th and 9th character of the filenames listed, no matter what character that is. So... (4 Replies)
Discussion started by: chipahoys
4 Replies

3. UNIX for Dummies Questions & Answers

Removing the lines which are same as 1st line

Hi, My file has the below content Heading 1 2 3 Heading 4 5 6 I need to remove the other occurrences of first line and display other lines. The content of first line is not static My output should be: Heading 1 2 (8 Replies)
Discussion started by: pandeesh
8 Replies

4. UNIX for Dummies Questions & Answers

append following lines to 1st line, every 3 lines

I have output like this: USER_ID 12/31/69 19:00:00 12/31/69 19:00:00 USER_ID 12/31/69 19:00:00 12/31/69 19:00:00 USER_ID 12/31/69 19:00:00 12/31/69 19:00:00 USER_ID 12/31/69 19:00:00 12/31/69 19:00:00 ... where USER_ID is a unique user login followed by their login timestamp and... (6 Replies)
Discussion started by: MaindotC
6 Replies

5. Shell Programming and Scripting

File w/ many line pairs--how do I order based on 1st lines only?

I have a file in which the data is stored in pairs of lines. The first line (beginining with ">") is a header, the second line is a sequence. I would like to sort the file by species name. Desired output for the example file: I can use sort -t'_' -k2 to alphabetize headers in the... (1 Reply)
Discussion started by: pathunkathunk
1 Replies

6. UNIX for Advanced & Expert Users

Problem piping find output to awk, 1st line filename is truncated, other lines are fine.

Today I needed to take a look through a load of large backup files, so I wrote the following line to find them, order them by size, and print the file sizes in GB along with the filename. What happened was odd, the output was all as expected except for the first output line which had the filename... (4 Replies)
Discussion started by: gencon
4 Replies

7. Shell Programming and Scripting

Need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line...

Hello, I need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line... An example of entries in the file would be: SRVXPAPI001 ERRO JUN24 07:28:34 1775 REASON= 0000, PROCID= #E506 #1065: TPCIPPR, INDEX= 003F ... (8 Replies)
Discussion started by: Ferocci
8 Replies

8. Shell Programming and Scripting

How to read file line by line and compare subset of 1st line with 2nd?

Hi all, I have a log file say Test.log that gets updated continuously and it has data in pipe separated format. A sample log file would look like: <date1>|<data1>|<url1>|<result1> <date2>|<data2>|<url2>|<result2> <date3>|<data3>|<url3>|<result3> <date4>|<data4>|<url4>|<result4> What I... (3 Replies)
Discussion started by: pat_pramod
3 Replies

9. UNIX for Beginners Questions & Answers

Get an output of lines in pattern 1st line then 10th line then 11th line then 20th line and so on.

Input file: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 (6 Replies)
Discussion started by: Sagar Singh
6 Replies
GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for lines containing a given pattern SYNOPSIS
grep [-elnsv] pattern [file] ... OPTIONS
-e -e pattern is the same as pattern -c Print a count of lines matched -i Ignore case -l Print file names, no lines -n Print line numbers -s Status only, no printed output -v Select lines that do not match EXAMPLES
grep mouse file # Find lines in file containing mouse grep [0-9] file # Print lines containing a digit DESCRIPTION
Grep searches one or more files (by default, stdin) and selects out all the lines that match the pattern. All the regular expressions accepted by ed and mined are allowed. In addition, + can be used instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1 occurrences, and | can be used between two regular expressions to mean either one of them. Parentheses can be used for grouping. If a match is found, exit status 0 is returned. If no match is found, exit status 1 is returned. If an error is detected, exit status 2 is returned. SEE ALSO
cgrep(1), fgrep(1), sed(1), awk(9). GREP(1)
All times are GMT -4. The time now is 04:03 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy