Sponsored Content
Top Forums Shell Programming and Scripting Replace a perticular character of all lines of a file Post 302150336 by abovais on Tuesday 11th of December 2007 03:41:31 AM
Old 12-11-2007
Replace a perticular character of all lines of a file

Hi all,

I am new to UNIX, so sorry if my question seem stupid to u.

well i want to replace the first character of first 30 lines of a file, only if the first character is h.

and

in anothe script i want to replace a particular string/character say hello/h of a file.Condition: It should replace all Hello/h in the first line where it is found and after that it should stop.

Thanks!
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

extract perticular lines and make them into speadsheet

Hi Masters, I knew this isn't a new issue, but couldn't find any similar threads. So, I have to bother you. Here is my input file (genomic data). The file has many sessions, each session seperated by //. Within eash session there is only one ID and GN line. ID 3HAO_HUMAN STANDARD; ... (4 Replies)
Discussion started by: mskcc
4 Replies

2. Shell Programming and Scripting

How to replace a character in the file?

Hi All, I have file contains the following information. chem00s4.mis.amat.com ] Critical 3/21 chem00s4.mis.amat.com ] Normal 3/22 chem00s4.mis.amat.com ] Normal 3/23 chem00s4.mis.amat.com ] Normal 3/24 chem00s4.mis.amat.com ] Critical 3/25... (2 Replies)
Discussion started by: ntgobinath
2 Replies

3. Shell Programming and Scripting

read in a file character by character - replace any unknown ASCII characters with spa

Can someone help me to write a script / command to read in a file, character by character, replace any unknown ASCII characters with space. then write out the file to a new filename/ Thanks! (1 Reply)
Discussion started by: raghav525
1 Replies

4. Shell Programming and Scripting

Replace last character in file

Greetings UNIX folks, I am running a tcsh script and trying to replace the last character of a file with the number 0. I know that the last character of the file will always be 1, but I only want to replace the last character. Example: 78062 26.55 78.77 1 MYGF1 24.89 15.78 1 ... (2 Replies)
Discussion started by: TheSMan5
2 Replies

5. Shell Programming and Scripting

Replace a character in a file

Hello, Can anyone help me? I need to replace the letters (A, B, C..) of the second column in this file by a number i.e. 1. current file 0123456 0A123 0003355 Marion 1234567 0B117 0003388 Anthony 1112333 0C345 0459877 Ann new file 0123456 01123 0003355 Marion 1234567 ... (3 Replies)
Discussion started by: Lilu_CK
3 Replies

6. Emergency UNIX and Linux Support

Replace nth position character of all the lines in file

I want to replace 150th character of all the lines in a file using sed or awk... searched the forums but didn't find exact answer (9 Replies)
Discussion started by: greenworld123
9 Replies

7. Shell Programming and Scripting

Search a character and replace it with multiple lines

This is for AIX 6.1, I've a flat file and the format is like this DECLARE some statements; BEGIN some statements; END; I've to search BEGIN and replace it with the following 4 lines BEGIN For x in 1..1 LOOP BEGIN Similarly I've to search END and replace it with the... (7 Replies)
Discussion started by: Mukul Sharma
7 Replies

8. UNIX for Dummies Questions & Answers

Replace character in odd or even lines

Hello, I'm here again asking for your precious help. I'm writing some code to convert csv files to html. I want to highlight header and also I want to have rows with alternate colors. So far this is my work###Let's format first line only with some color cat $fileIN".tmp1" | sed '1... (7 Replies)
Discussion started by: emare
7 Replies

9. Shell Programming and Scripting

Replace character in a file.

I have a data like this in a file. 05/08/2017,U,01,116326001 05/08/2017,U,01,116226001 05/08/2017,U,01,116726323 05/08/2017,U,01,116236001 I want replace the date(1st column) of all records. Ex: 05/08/2017 to 04/02/2017 Please use CODE tags when displaying sample input, sample output,... (1 Reply)
Discussion started by: Artlk
1 Replies

10. Shell Programming and Scripting

Replace the perticular fileds in passwd file

Hi I have 2 different password entries in 2 different files for the same user. file 1 - siva:correct:1000:23:siva:/home/siva:/bin/bash file 2 - siva:incorrect:1000:23:siva:/home/siva:/bin/bash file 1 is having correct passwd entry where as file 2 is wrong. Now, i want to compare... (3 Replies)
Discussion started by: kumar85shiv
3 Replies
PASTE(1)						    BSD General Commands Manual 						  PASTE(1)

NAME
paste -- merge corresponding or subsequent lines of files SYNOPSIS
paste [-s] [-d list] file ... DESCRIPTION
The paste utility concatenates the corresponding lines of the given input files, replacing all but the last file's newline characters with a single tab character, and writes the resulting lines to standard output. If end-of-file is reached on an input file while other input files still contain data, the file is treated as if it were an endless source of empty lines. The options are as follows: -d list Use one or more of the provided characters to replace the newline characters instead of the default tab. The characters in list are used circularly, i.e., when list is exhausted the first character from list is reused. This continues until a line from the last input file (in default operation) or the last line in each file (using the -s option) is displayed, at which time paste begins selecting characters from the beginning of list again. The following special characters can also be used in list: newline character tab character \ backslash character Empty string (not a null character). Any other character preceded by a backslash is equivalent to the character itself. -s Concatenate all of the lines of each separate input file in command line order. The newline character of every line except the last line in each input file is replaced with the tab character, unless otherwise specified by the -d option. If '-' is specified for one or more of the input files, the standard input is used; standard input is read one line at a time, circularly, for each instance of '-'. EXAMPLES
List the files in the current directory in three columns: ls | paste - - - Combine pairs of lines from a file into single lines: paste -s -d ' ' myfile Number the lines in a file, similar to nl(1): sed = myfile | paste -s -d ' ' - - Create a colon-separated list of directories named bin, suitable for use in the PATH environment variable: find / -name bin -type d | paste -s -d : - DIAGNOSTICS
The paste utility exits 0 on success, and >0 if an error occurs. SEE ALSO
cut(1), lam(1) STANDARDS
The paste utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. HISTORY
A paste command appeared in Version 32V AT&T UNIX. BUGS
Multibyte character delimiters cannot be specified with the -d option. BSD
September 20, 2001 BSD
All times are GMT -4. The time now is 04:36 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy