Sponsored Content
Top Forums Shell Programming and Scripting Delete lines starting with these strings Post 302837251 by rbatte1 on Thursday 25th of July 2013 12:00:03 PM
Old 07-25-2013
Have you read the manual pages for egrep?

Have a look at the -v option and consider the special character ^ meaning the start of the record.


Does this help you out?



Robin
Liverpool/Blackburn
UK
This User Gave Thanks to rbatte1 For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Delete lines starting with XX or YY or ZZ or ....

Hi There! My final task for today is to delete lines starting with certain numbers for e.g., my text block is and i want to delete all lines starting with 11 or 17 or 21 I know i can use multiple sed commands like sed '/^11,/d' <filename> sed '/^17,/d' <filename> sed '/^21,/d'... (2 Replies)
Discussion started by: orno
2 Replies

2. Shell Programming and Scripting

Grep and delete lines except the lines with strings

Hi I am writing a script which should read a file and search for certain strings 'approved' or 'removed' and retain only those lines that contain the above strings. Ex: file name 'test' test: approved package waiting for approval package disapproved package removed package approved... (14 Replies)
Discussion started by: vj8436
14 Replies

3. UNIX for Dummies Questions & Answers

Delete lines with duplicate strings based on date

Hey all, a relative bash/script newbie trying solve a problem. I've got a text file with lots of lines that I've been able to clean up and format with awk/sed/cut, but now I'd like to remove the lines with duplicate usernames based on time stamp. Here's what the data looks like 2007-11-03... (3 Replies)
Discussion started by: mattv
3 Replies

4. Shell Programming and Scripting

Search the word to be deleted and delete lines above this word starting from P1 to P3

Hi, I have to search a word in a text file and then I have to delete lines above from the word searched . For eg suppose the file is like this: Records P1 10,23423432 ,77:1 ,234:2 P2 10,9089004 ,77:1 ,234:2 ,87:123 ,9898:2 P3 456456 P1 :123,456456546 P2 abc:324234 (2 Replies)
Discussion started by: vsachan
2 Replies

5. Shell Programming and Scripting

Delete lines in file containing duplicate strings, keeping longer strings

The question is not as simple as the title... I have a file, it looks like this <string name="string1">RZ-LED</string> <string name="string2">2.0</string> <string name="string2">Version 2.0</string> <string name="string3">BP</string> I would like to check for duplicate entries of... (11 Replies)
Discussion started by: raidzero
11 Replies

6. Shell Programming and Scripting

delete lines starting with a pattern

i have a file sample.txt containing i want to delete lines starting with 123 neglecting spaces and tabs. but not lines containing 123. i.e. i want files sample.txt as help me thanxx (4 Replies)
Discussion started by: yashwantkumar
4 Replies

7. Shell Programming and Scripting

Delete multiple lines starting with a specific pattern

Hi, just tried some script, awk, sed for the last 2 hours and now need help. Let's say I have a huge file of 800,000 lines like this : It's a tedious job to look through it, I'd like to remove those useless lines in it as there's a few thousands : Or to be even more precise : if line1 =... (6 Replies)
Discussion started by: Zurd
6 Replies

8. Shell Programming and Scripting

How to delete lines starting with specific string?

Dear all, I would like to delete even lines starting with "N" together with their respective titles which are actually odd lines. Below is the example of input file. I would like to remove line 8 and 12 together with its title line, i.e., line 7 and 11, respectively.... (2 Replies)
Discussion started by: huiyee1
2 Replies

9. Shell Programming and Scripting

Delete all lines starting with # character

Tool used : VIM editor that comes with RHEL 7.4 I have a file like below. It has around 300 lines like below. All the lines starting with # are comments. For readability, I removed all lines starting with # from vi (vim editor) using the command :g/^#/d . It seemed to have worked. But, which... (8 Replies)
Discussion started by: John K
8 Replies

10. Shell Programming and Scripting

Delete all lines except a line starting with string

Shell : bash OS : RHEL 6.8 I have a file like below. $ cat pattern.txt hello txt1 txt2 txt3 some other text txt4 I want to remove all lines in this file except the ones starting with txt . How can I do this ? (4 Replies)
Discussion started by: omega3
4 Replies
MATCH(1L)						      Schily's USER COMMANDS							 MATCH(1L)

NAME
match - searches for patterns in files SYNOPSIS
match [ -option ] pattern [ file ... ] DESCRIPTION
Match searches the named files or standard input (if no filenames are given) for the occurrences of the given pattern on each line. The program accepts literal characters or special pattern matching characters. All lines that match the pattern are output on standard output. You can only specify one pattern string for each match, however, you can construct an arbitrarily complex string. When you do not specify a file, match can be used as a filter to display desired lines. Standard in is used if no files are specified. OPTIONS
-not, -v Prints all lines that do not match. -i Ignore the case of letters -m Force not to use the magic mode -w Search for pattern as a word -x Display only those lines which match exactly -c Display matching count for each file -l Display name of each file which matches -s Be silent indicate match in exit code -h Do not display filenames -n Precede matching lines with line number (with respect to the input file) -b Precede matching lines with block number REGULAR EXPRESSIONS
The following is a table of all the pattern matching characters: c An ordinary character (not one of the special characters discussed below) is a one character regular expression that matches that character. c A backslash () followed by any special character is a one character regular expression that matches the special character itself. The special characters are: ! # % * { } [ ] ? ^ $ ! Logical OR as in match this!that!the_other. You may have to use `{}' for precedence grouping. # A hash mark followed by any regular expression matches any number (including zero) occurrences of the regular expression. ? Matches exactly any one character. W? matches Wa, Wb, Wc, W1, W2, W3 ... * Matches any number of any character. % Matches exactly nothing. It can be used in groups of ored patterns to specify that an empty alternative is possible. {} Curly brackets may be used to enclose patterns to specify a precedence grouping, and may be nested. {%!{test}}version matches the strings testversion and version. [string] A non empty string of characters enclosed in square brackets is a one character regular expression that matches any one character in that string. If however the first character of the string is a circumflex (^), the one character expression matches any character which is not in the string. The ^ has this special meaning only if it occurs first in the string. The minus (-) may be used to indi- cate a range of consecutive ASCII characters; for example, [0-9] is equivalent to any one of the digits. The - loses it's special meaning if it occurs first (after an initial ^, if any) or last in the string. The right square bracket (]) and the backslash () must be quoted with a backslash if you want to use it within the string. ^ Matches the beginning of a line. $ Matches the end of a line. (^*$ matches any entire line) EXAMPLES
FILES
None. SEE ALSO
grep(1), fgrep(1), egrep(1) DIAGNOSTICS
NOTES
Even if a match occurs more than once per line, the line is output only once. Quote special pattern matching characters to prevent them from being expanded by the Command Interpreter. BUGS
The length of the pattern is currently limited to 100 characters. This limit is reduced by 38 if the -w option is used. Joerg Schilling 15. Juli 1988 MATCH(1L)
All times are GMT -4. The time now is 08:01 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy