Sponsored Content
Top Forums Shell Programming and Scripting RegExp: From first occurrance to last (at line start) Post 302156308 by reborg on Monday 7th of January 2008 06:54:44 PM
Old 01-07-2008
With localhost0 lines:
Code:
awk '/^localhost0/ { min = min ? min : NR ; max = NR }  min { line[NR] = $0 } END { for ( i = min ; i <= max ; i++ ) { print line[i]}}' file

without:
Code:
awk '/^localhost0/ { min = min ? min : NR ; max = NR }  min { line[NR] = $0 } END { for ( i = min + 1 ; i < max ; i++ ) { print line[i]}}' file

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Finding occurrance of a value in a variable

Hi, I was given a question like this: Write a program which reads a set of arguments from the standard input. Note that there is no limit for the number of arguments. The first argument is the file name and the other arguments are searched in the given file. For each argument, it displays... (3 Replies)
Discussion started by: ambitious
3 Replies

2. Shell Programming and Scripting

regexp to get first line of string

Hi everybody for file in * #Bash performs filename expansion #+ on expressions that globbing recognizes. do output="`grep -n "$1" "$file"`" echo "$file: `expr "$output" : '\(^.*$\)'`" done In the above bash script segment, I try to print just the first line of string named... (3 Replies)
Discussion started by: jonas.gabriel
3 Replies

3. Shell Programming and Scripting

Replace Entire line if any part matches regexp

Hey guys, I have a file that I've slowly been awking, seding, and greping for data entry. I am down to pull the addresses out to insert them into an excel file. Each address is a few lines, but i want to put a semicolon delimiter in between each address so I can export the text file into excel and... (6 Replies)
Discussion started by: Cocoabean
6 Replies

4. UNIX for Dummies Questions & Answers

print the line immediately after a regexp; but regexp is a sentence

Good Day, Im new to scripting especially awk and sed. I just would like to ask help from you guys about a sed command that prints the line immediately after a regexp, but not the line containing the regexp. sed -n '/regexp/{n;p;}' filename What if my regexp is 3 word or a sentence. Im... (3 Replies)
Discussion started by: ownins
3 Replies

5. Shell Programming and Scripting

use regexp to insert newline within a line

I have successfully used regexp and sed to insert a newline before or after a line containing a matched pattern /WORD/. However, I want to insert a newline immediately following /WORD/ and not after the -line- containing the pattern matched. I can match a pattern, but it is matched via a wild card... (2 Replies)
Discussion started by: kpeirce
2 Replies

6. Shell Programming and Scripting

Print lines between a regExp & a blank line

Hi, I have a file, say files_list, as below (o/p of ls -R cmd) $ cat files_list /remote/dir/path/to/file: sub-dir1 sub-dir2 sub-dir3 ... /remote/dir/path/to/file/sub-dir1: remote_file1.csv.tgz <blank line 1> /remote/dir/path/to/file/sub-dir2: remote_file2.csv.tgz <blank... (3 Replies)
Discussion started by: dips_ag
3 Replies

7. Shell Programming and Scripting

sed print first line before regexp and all lines after

Hi All I'm trying to extract the line just above a regexp and all lines after this. I'm currently doing this in two steps sed -n -e "/^+---/{g;p;}" -e h oldfile.txt > modified.txt sed -e "1,/^+---/d" -e "/^$/d" oldfile.txt >>modified.txt Sample sometext will be here sometext will be... (3 Replies)
Discussion started by: Celvin VK
3 Replies

8. Shell Programming and Scripting

Reading line by line from live log file using while loop and considering only those lines start from

Hi, I want to read a live log file line by line and considering those line which start from time stamp; Below code I am using, which read line but throws an exception when comparing line that does not contain error code tail -F /logs/COMMON-ERROR.log | while read myline; do... (2 Replies)
Discussion started by: ketanraut
2 Replies

9. Shell Programming and Scripting

Print 4th line back from regexp

I'm looking for a way to print the 4th line back from a regular expression. Kind of like the below but it has to be the 4th line before the regexp. Print the line immediately before regexp, but not the line containing the regexp. sed -n '/regexp/{g;1!p;};h' here is an example of logs(i... (11 Replies)
Discussion started by: senormarquez
11 Replies

10. UNIX for Beginners Questions & Answers

awk or sed to print the character from the previous line after the regexp match

Hi All, I need to print the characters in the previous line just before the regular expression match Please have a look at the input file as attached I need to match the regular expression ^ with the character of the previous like and also the pin numbers and the output file should be like... (6 Replies)
Discussion started by: kshitij
6 Replies
LAM(1)							    BSD General Commands Manual 						    LAM(1)

NAME
lam -- laminate files SYNOPSIS
lam [-f min.max] [-s sepstring] [-t c] file ... lam [-p min.max] [-s sepstring] [-t c] file ... DESCRIPTION
The lam utility copies the named files side by side onto the standard output. The n-th input lines from the input files are considered frag- ments of the single long n-th output line into which they are assembled. The name `-' means the standard input, and may be repeated. Normally, each option affects only the file after it. If the option letter is capitalized it affects all subsequent files until it appears again uncapitalized. The options are described below: -f min.max Print line fragments according to the format string min.max, where min is the minimum field width and max the maximum field width. If min begins with a zero, zeros will be added to make up the field width, and if it begins with a `-', the fragment will be left- adjusted within the field. -p min.max Like -f, but pad this file's field when end-of-file is reached and other files are still active. -s sepstring Print sepstring before printing line fragments from the next file. This option may appear after the last file. -t c The input line terminator is c instead of a newline. The newline normally appended to each output line is omitted. To print files simultaneously for easy viewing use pr(1). EXAMPLES
The command lam file1 file2 file3 file4 joins 4 files together along each line. To merge the lines from four different files use lam file1 -S " " file2 file3 file4 Every 2 lines of a file may be joined on one line with lam - - < file and a form letter with substitutions keyed by `@' can be done with lam -t @ letter changes SEE ALSO
join(1), paste(1), pr(1), printf(3) STANDARDS
Some of the functionality of lam is standardized as the paste(1) utility by IEEE Std 1003.2 (``POSIX.2''). BUGS
The lam utility does not recognize multibyte characters. BSD
August 12, 2004 BSD
All times are GMT -4. The time now is 04:39 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy