Sponsored Content
Top Forums Shell Programming and Scripting remove characters from string based on occurrence of a string Post 302493773 by victor369 on Thursday 3rd of February 2011 05:03:18 PM
Old 02-03-2011
remove characters from string based on occurrence of a string

Hello Folks..

I need your help ..

here the example of my problem..i know its easy..i don't all the commands in unix to do this especiallly sed...here my string..

dwc2_dfg_ajja_dfhhj_vw_dec2_dfgh_dwq

desired output is..

dwc2_dfg_ajja_dfhhj

it's a simple task with tail command, but my string size varies..only constant thing is ocuurance of this string "_vw_"

I greatly appretiate your help..

Thanks
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Remove special characters from string

Hi there, I'd like to write a script that removes any set of character from any string. The first argument would be the string, the second argument would be the characters to remove. For example: $ myscript "My name's Santiago. What's yours?" "atu" My nme's Snigo. Wh's yors? I wrote the... (11 Replies)
Discussion started by: chebarbudo
11 Replies

2. Shell Programming and Scripting

how to remove characters from a string

Hi. for the following line: Var1=${Array} now Array has text as "{hello there}" how do I remove the {} brackets before assigning the string to Var1? Thanks. (3 Replies)
Discussion started by: shadow_boi
3 Replies

3. Shell Programming and Scripting

remove last 4 characters from a string

I'm tring to remove the last 4 characters from strings in a file i.e. cat /tmp/test iwishicouldremovethis icouldremovethos so i would end up with the last 4 characters from each of the above i.e. this thos I thought of using cut -c ... but I'm not sure how many characters will... (7 Replies)
Discussion started by: josslate
7 Replies

4. Shell Programming and Scripting

Remove characters from string

Hi I am new in shell scripting and i want to manipulate a string. I have a string tha looks like: /home/nteath/file.txt I want to remove everything until the last "/" , to keep only the filename. e.g. /home/nteath/file.txt output: file.txt Thanks (2 Replies)
Discussion started by: nteath
2 Replies

5. Shell Programming and Scripting

Remove string between two special characters

Hi All, I have a variable like AVAIL="\ BACK:bkpstg:testdb3.iad.expertcity.com:backtest|\ #AUTH:authstg:testdb3.iad.expertcity.com:authiapd|\ TEST:authstg:testdb3.iad.expertcity.com:authiapd|\ " What I want to do here is that If a find # before any entry, remove the entire string... (5 Replies)
Discussion started by: engineermayur
5 Replies

6. UNIX for Dummies Questions & Answers

counting occurrence of characters in a string

Hello, I have a string like this 0:1:2:0:2:2:4:0:0:0:-200:500...... what i want is to break down how many different characters are there and their count. For example for above string it should display 0 - 5 times 1 - 1 times 2 - 3 times 4 - 1 times . . . I am stuck in writing... (8 Replies)
Discussion started by: exit86
8 Replies

7. Shell Programming and Scripting

sed or awk command to replace a string pattern with another string based on position of this string

here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb cat dump.sql INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
Discussion started by: vivek d r
10 Replies

8. Shell Programming and Scripting

How to remove some special characters in a string?

Hi, I have string like this ="Lookup Procedure" But i want the output like this Lookup Procedure =," should be removed. Please suggest me the solution. Regards, Madhuri (2 Replies)
Discussion started by: srimadhuri
2 Replies

9. Shell Programming and Scripting

Remove last occurrence of character (_) and rest of the string in UNIX (sed)

Hi I need help on this ..!! Input : xx_abc_regA xx_def_regB xx_qwe_regC Now i required the output as the below abc def qwe Need to remove last occurrence of character (_) and rest of the string in Unix (sed). Thanks in Advance ..!!! -Nallachand (3 Replies)
Discussion started by: Nallachand
3 Replies

10. UNIX for Dummies Questions & Answers

Count occurrence of string (based on type) in a column using awk

Hello, I have a table that looks like what is shown below: AA BB CC XY PQ RS AA BB CC XY RS I would like the total counts depending on the set they belong to: if search pattern is in {AA, BB, CC} --> count them as Type1 | wc -l (3 Replies)
Discussion started by: Gussifinknottle
3 Replies
TAIL(1) 						      General Commands Manual							   TAIL(1)

NAME
tail - deliver the last part of a file SYNOPSIS
tail [ +-number[lbc][rf] ] [ file ] tail [ -fr ] [ -n nlines ] [ -c ncharacters ] [ file ] DESCRIPTION
Tail copies the named file to the standard output beginning at a designated place. If no file is named, the standard input is copied. Copying begins at position +number measured from the beginning, or -number from the end of the input. Number is counted in lines, 1K blocks or characters, according to the appended flag or Default is -10l (ten ell). The further flag causes tail to print lines from the end of the file in reverse order; (follow) causes tail, after printing to the end, to keep watch and print further data as it appears. The second syntax is that promulgated by POSIX, where the numbers rather than the options are signed. EXAMPLES
tail file Print the last 10 lines of a file. tail +0f file Print a file, and continue to watch data accumulate as it grows. sed 10q file Print the first 10 lines of a file. SOURCE
/sys/src/cmd/tail.c BUGS
Tails relative to the end of the file are treasured up in a buffer, and thus are limited in length. According to custom, option +number counts lines from 1, and counts blocks and characters from 0. TAIL(1)
All times are GMT -4. The time now is 02:33 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy