Sponsored Content
Top Forums UNIX for Dummies Questions & Answers How to delete a particular word on particular line with sed? Post 302857143 by Corona688 on Wednesday 25th of September 2013 01:01:12 PM
Old 09-25-2013
For these kinds of logical statements I prefer the UNIX awk command since it actually has logical statements...

Code:
$ printf "%s\n" "NEW" "NEW" "/v/engine" "NEW" |
        awk '! (/NEW/ && (NR==1))'
NEW
/v/engine
NEW

$

/NEW/ && (NR==1) would mean "print lines whenever the line matches the regex /NEW/, and NR ( line number ) equals 1". Putting a ! in front negates it, to print lines only when that's false.
This User Gave Thanks to Corona688 For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Sed help to delete everything prior to WORD

How would I delete everything on a line in a file prior to a specific word? In other words, I have a file that contains the word SEARCH on various lines and would like to delete everything prior to SEARCH on all lines. Thanks for that help (2 Replies)
Discussion started by: drheams
2 Replies

2. UNIX for Dummies Questions & Answers

Find a word and delete the line

Hi I have a text file like this name today.txt the request has been accepted the scan is successful at following time there are no invalid packages 5169378 : map : Permission Denied the request has been accepted Now what i want do is I want to search the today.txt file and if i... (1 Reply)
Discussion started by: gsusarla
1 Replies

3. UNIX for Advanced & Expert Users

Delete a word and complete line

Hi Canone please provide me solution how can achieve the result below: File1.txt $ sweet appleŁ1 scotish green $ This is a test1 $ sweet mangoŁ2 asia yellow $ This is a test 2 $ sweet apple red (there is no pound symbol here) germany green (1 Reply)
Discussion started by: Aejaz
1 Replies

4. Shell Programming and Scripting

delete line containin specified word

write a shell script that deletes all lines containing a specified word in one or more files supplied as arguments to it.help is appreciated .thank you. (2 Replies)
Discussion started by: shawz
2 Replies

5. Shell Programming and Scripting

Sed or Grep to delete line containing patter plus extra line

I'm new to using sed and grep commands, but have found them extremely useful. However I am having a hard time figuring this one out: Delete every line containing the word CEN and the next line as well. ie. test.txt blue 324 CEN green red blue 324 CEN green red blue to produce:... (2 Replies)
Discussion started by: rocketman88
2 Replies

6. Shell Programming and Scripting

SED to delete last word on line...what's wrong?

I have a line that gets pulled from a database that has a variable number of fields, fields can also be of a variable size. Each field has a variable number of spaces between them so there is no 'defined' delimiter. The LastData block is always a single word. What I want to do is delete the... (2 Replies)
Discussion started by: Bashingaway
2 Replies

7. UNIX for Dummies Questions & Answers

How to print line starts with specific word and contains specific word using sed?

Hi, I have gone through may posts and dint find exact solution for my requirement. I have file which consists below data and same file have lot of other data. <MAPPING DESCRIPTION ='' ISVALID ='YES' NAME='m_TASK_UPDATE' OBJECTVERSION ='1'> <MAPPING DESCRIPTION ='' ISVALID ='NO'... (11 Replies)
Discussion started by: tmalik79
11 Replies

8. UNIX for Dummies Questions & Answers

delete last word of each line a directory

I want to delete the last word of each line in all the files in one directory but dont know what I am doing wrong FILES="data/*" for X in $FILES do name=$(basename $X) sed s/'\w*$'// $X > no-last/${name} done Can you please help me :wall: (8 Replies)
Discussion started by: A-V
8 Replies

9. Shell Programming and Scripting

sed command to grep multiple pattern present in single line and delete that line

here is what i want to achieve.. i have a file with below contents cat fileName blah blah blah . .DROP this REJECT that . --sport 7800 -j REJECT --reject-with icmp-port-unreachable --dport 7800 -j REJECT --reject-with icmp-port-unreachable . . . more blah blah blah --dport 3306... (14 Replies)
Discussion started by: vivek d r
14 Replies

10. UNIX for Beginners Questions & Answers

sed script to delete the last word after a last pattern match

Hi Guys , I am having a file as stated below File 1 sa0 -- i_core/i_core_apb/i_afe0_controller/U261/A sa0 -- i_core/i_core_apb/i_afe0_controller/U265/Z sa1 -- i_core/i_core_apb/i_afe0_controller/U265/A sa1 -- i_core/i_core_apb/i_afe0_controller/U268/Z sa1 -- ... (7 Replies)
Discussion started by: kshitij
7 Replies
GREP(1) 						      General Commands Manual							   GREP(1)

NAME
grep - search a file for a pattern SYNOPSIS
grep [ option ... ] pattern [ file ... ] DESCRIPTION
Grep searches the input files (standard input default) for lines (with newlines excluded) that match the pattern, a regular expression as defined in regexp(6). Normally, each line matching the pattern is `selected', and each selected line is copied to the standard output. The options are -c Print only a count of matching lines. -h Do not print file name tags (headers) with output lines. -i Ignore alphabetic case distinctions. The implementation folds into lower case all letters in the pattern and input before interpre- tation. Matched lines are printed in their original form. -l (ell) Print the names of files with selected lines; don't print the lines. -L Print the names of files with no selected lines; the converse of -l. -n Mark each printed line with its line number counted in its file. -s Produce no output, but return status. -v Reverse: print lines that do not match the pattern. Output lines are tagged by file name when there is more than one input file. (To force this tagging, include /dev/null as a file name argument.) Care should be taken when using the shell metacharacters $*[^|()= and newline in pattern; it is safest to enclose the entire expression in single quotes '...'. SOURCE
/sys/src/cmd/grep.c SEE ALSO
ed(1), awk(1), sed(1), sam(1), regexp(6) DIAGNOSTICS
Exit status is null if any lines are selected, or non-null when no lines are selected or an error occurs. GREP(1)
All times are GMT -4. The time now is 02:17 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy