Sponsored Content
Top Forums Shell Programming and Scripting grep or sed. How to remove certain characters Post 302438719 by Sucio on Tuesday 20th of July 2010 01:37:34 PM
Old 07-20-2010
grep or sed. How to remove certain characters

Here is my problem.

I have a list of phone numbers that I want to use only the last 4 digits as PINs for something I am working on. I have all the numbers in a file but now I want to be removed all items EXCEPT the last 4 digits.

I have seen sed commands and some grep commands but I am having some trouble.

Here is what I want to do.

file(before edit)

Code:
718-555-5465
(718) 555-1234
718-555-5678

file(after edit)
Code:
5465
1234
5678

thanks a lot guys.

Last edited by radoulov; 07-20-2010 at 02:39 PM.. Reason: Code tags, please!
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

sed to remove last 2 characters of txt file

sed 's/^..//' file1.txt > file2.txt this will remove the first two characters of each line of a text file, what sed command will remove the last two characters? This is a similar post to my other....sry if I'm being lazy.... I need a file like this (same as last post) >cat file1.txt 10081551... (1 Reply)
Discussion started by: ajp7701
1 Replies

2. Shell Programming and Scripting

sed: remove characters between and including 2 strings

I have the following line: 4/23/2010 0:00:38.000: Copying $$3MSYDDC02$I would like to use sed (or similiar) to remove everthing between and including $ that appears in the line so it ends up like this. 4/23/2010 0:00:38.000: Copying 3MSYDDC02I have been trying these but i'm really just... (5 Replies)
Discussion started by: jelloir
5 Replies

3. UNIX for Dummies Questions & Answers

sed command to remove characters help!

I am trying to analyse a large file of sequencing data, example of first 10 lines below, @HWUSI-EAS656_0044_FC:7:1:2447:1039#GCAATT/1 GNCTATGGCTTGCCGGGCTCAGGGAAGACAATCATAGCCATGAAAATCATGGAAAAGATCAGAAAAACATTTCAA +HWUSI-EAS656_0044_FC:7:1:2447:1039#GCAATT/1... (1 Reply)
Discussion started by: Adeleh
1 Replies

4. Shell Programming and Scripting

Sed or trim to remove non alphanumeric and alpha characters?

Hi All, I am new to Unix and trying to run some scripting on a linux box. I am trying to remove the non alphanumeric characters and alpha characters from the following line. <measResults>883250 869.898 86432.4 809875.22 804609 60023 59715 </measResults> Desired output is: 883250... (6 Replies)
Discussion started by: jackma
6 Replies

5. Shell Programming and Scripting

sed or tr to remove specific group of special characters

Hi, I have a input of the form: ..., word1, word2, word3... I want out put of the form word1, word2, word3 I tried echo '..., word1, word2, word3...' | tr -d '...,' but that takes out the commas in the middle too so I get word1 word2 word3 but I want the commas in the middle. ... (3 Replies)
Discussion started by: forumbaba
3 Replies

6. Shell Programming and Scripting

Remove the Characters '[' and ']' with Sed

Hi, I am new to Sed and would like to know if it is possible to remove the characters . I have a couple of files with a keyword and would like to remove the substring. I am Using sed s/// but Its not working Thanks for your Support Andrew Borg (2 Replies)
Discussion started by: andrewborg
2 Replies

7. Shell Programming and Scripting

Sed - remove special characters

Hi, I have a file with this line, it's always in the first line: I want to remove these special characters: ´╗┐ file1 ´╗┐\\bar\c$\test2\;3.348.118 Bytes;160 ;3 \\bar\c$\test\;35 Bytes;2 ;1 I want the same file to be only \\bar\c$\test2\;3.348.118 Bytes;160 ;3 \\bar\c$\test\;35... (4 Replies)
Discussion started by: nakaedu
4 Replies

8. Shell Programming and Scripting

How does this sed expression to remove non-alpha characters work?

Hello! I know that this expression gets rid of non-alphanumeric characters: sed 's///g' and I understand that it is replacing them with nothing - hence the '//'-, but I don't understand how it's doing it. It seems it's finding strings that begin with alphanumeric and replacing them with... (2 Replies)
Discussion started by: bgnersoon2be#1
2 Replies

9. Shell Programming and Scripting

Grep to remove non-ASCII characters

I have been having an encoding problem that I need to solve. I have an 4-column tab-separated file: I need to remove all of the lines that contain the string 'vis-à-vis' achiever-n vis-à-vis+ns-j+vp oppose-v 1 achiever-n vis-à-vis+ns-the+vg assess-v 1 administrator-n ... (4 Replies)
Discussion started by: owwow14
4 Replies

10. Shell Programming and Scripting

Grep to remove and add specified characters

I have the following type of 2 column file: motility - role - supplementation - age b ancestry b purity b recommendation b serenity b unease b carving f expansion f I would like to print only certain sections of the file depending on the value of the second column. For instance,... (6 Replies)
Discussion started by: owwow14
6 Replies
PHONES(5)						      BSD File Formats Manual							 PHONES(5)

NAME
phones -- remote host phone number data base DESCRIPTION
The file /etc/phones contains the system-wide private phone numbers for the tip(1) program. This file is normally unreadable, and so may contain privileged information. The format of the file is a series of lines containing whitespace separate fields, of the form: system-name phone-number The system-name is one of those defined in the remote(5) file. The phone-number is constructed from any sequence of characters terminated only by a comma (``,'') or the end of the line. The equals (``='') and asterisk (``*'') characters are indicators to the auto call units to pause and wait for a second dial tone (when going through an exchange). The ``='' is required by the DF02-AC and the ``*'' is required by the BIZCOMP 1030. Only one phone number per line is permitted. However, if more than one line in the file contains the same system name tip(1) will attempt to dial each one in turn, until it establishes a connection. FILES
/etc/phones SEE ALSO
tip(1), remote(5) HISTORY
The phones file appeared in 4.2BSD. BSD
January 3, 2001 BSD
All times are GMT -4. The time now is 01:41 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy