Sponsored Content
Top Forums Shell Programming and Scripting Deleting the Last value from a file Post 302397681 by Scrutinizer on Tuesday 23rd of February 2010 12:50:55 AM
Old 02-23-2010
No need to escape the "," also the global option is at best superfluous:
Code:
sed 's/,$//' infile

Quote:
Originally Posted by ripat
You can do this with your shell parameter expansion

Code:
$ var="aaa,aaad,fsdfde,"

$ echo ${var%*,}
aaa,aaad,fsdfde

or:
Code:
echo ${var%,}

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Remove the contents of a file without deleting the file

Hi All, I want to delete the contents of few files which are really huge in size. How the same can be done by using sed. Is there any other alternative to sed. Thanks in advance (10 Replies)
Discussion started by: sumesh.abraham
10 Replies

2. Shell Programming and Scripting

Deleting lines inside a file without opening the file

Hi, Just consider there are around 10 lines in a file. Now is it possible to delete the first 2 lines in the file without opening the file. No matter whatever the content of the file is, I just wanna delete the first 2 lines without opening the file. Is that possible? If so, please help me out.... (3 Replies)
Discussion started by: toms
3 Replies

3. UNIX for Dummies Questions & Answers

Help deleting a file

Hi and apologies but I'm normally a windows and network admin but atm I'm looking after a unix system while the admin is on holiday. I was assured everything would be fine but he's only been gone for 2 days and already webmail has stopped working! It suggests that there is no space left: ... (2 Replies)
Discussion started by: shirtee
2 Replies

4. UNIX for Dummies Questions & Answers

Checking for a file in file pattern before deleting it

Hi, I need a script where I have delete all the files of type abc*.* from the directory /lmn/opq (passed as parameter to script) But I need to check if there is file of type abc*.* existing in the directory or not before I use the rm abc*.* command. Thanks (1 Reply)
Discussion started by: dsrookie
1 Replies

5. Shell Programming and Scripting

Deleting lines of a file if they exist in another file

I have a reference file that needs to remain static and another file that may or may not have duplicate rows that match the reference file. I need help with a command that will delete any duplicate rows from the second file while leaving reference file intact For example reference file would... (4 Replies)
Discussion started by: bjdamon
4 Replies

6. Shell Programming and Scripting

awk - writing matching pattern to a new file and deleting it from the current file

Hello , I have comma delimited file with over 20 fileds that i need to do some validations on. I have to check if certain fields are null and then write the line containing the null field into a new file and then delete the line from the current file. Can someone tell me how i could go... (2 Replies)
Discussion started by: goddevil
2 Replies

7. UNIX for Advanced & Expert Users

How to delete a* file with out deleting file name starting with a?

Hi, I have a query: I have a bunch of files starting letter with 'a' (example: abhi,all,anand,animal,a1.txt,allow.java,a*) here i want to delete/remove only a* folder but not other files and folders. and a* folder is present in so many other folders. what is unix command to delete... (9 Replies)
Discussion started by: rajanikanth86
9 Replies

8. Shell Programming and Scripting

Deleting file name

I need a way to remove all the file names with they are extension from a line of a document. For example: I have doc named "gara" with the following content: /media/gogo/6651-FEAB/Desktop/Desktop.jpg /media/gogo/6651-FEAB/Desktop.pdf /media/gogo/6651-FEAB/linux/logo1.jpg... (4 Replies)
Discussion started by: gogok_bg
4 Replies

9. UNIX for Dummies Questions & Answers

Deleting a pattern in UNIX without deleting the entire line

Hi I have a file: r58778.3|SOURCES={KEY=f665931a...,fw,221-705}|ERRORS={16_1:T,30_1:T,56_1:C,57_1:T,59_1:A,101_1:A,115:-,158_1:C,186_1:A,204:-,271_1:T,305:-,350_1:C,368_1:G,442_1:C,472_1:G,477_1:A}|SOURCE_1="Contig_1092402550638"(f665931a359e36cea0976db191ff60ff09cc816e) I want to retain... (15 Replies)
Discussion started by: Alyaa
15 Replies

10. UNIX for Dummies Questions & Answers

Deleting file basing on the timestamp substring in the file name

Hello, I have in my backup folder, files with names convention like this : randomFileNames_13-02-2014_23h13m09+1392333189 randomFileNames_14-02-2014_02h13m09+1392343989 randomFileNames_14-02-2014_04h13m09+1392351189 etc.... Base on timestamp at end of the filename, I would to delete all the... (7 Replies)
Discussion started by: thuyetti
7 Replies
REPLACE(1)						       MySQL Database System							REPLACE(1)

NAME
replace - a string-replacement utility SYNOPSIS
replace arguments DESCRIPTION
The replace utility program changes strings in place in files or on the standard input. Note The replace utility is deprecated as of MySQL 5.7.18 and is removed in MySQL 8.0. Invoke replace in one of the following ways: shell> replace from to [from to] ... -- file_name [file_name] ... shell> replace from to [from to] ... < file_name from represents a string to look for and to represents its replacement. There can be one or more pairs of strings. Use the -- option to indicate where the string-replacement list ends and the file names begin. In this case, any file named on the command line is modified in place, so you may want to make a copy of the original before converting it. replace prints a message indicating which of the input files it actually modifies. If the -- option is not given, replace reads the standard input and writes to the standard output. replace uses a finite state machine to match longer strings first. It can be used to swap strings. For example, the following command swaps a and b in the given files, file1 and file2: shell> replace a b b a -- file1 file2 ... replace supports the following options. o -?, -I Display a help message and exit. o -#debug_options Enable debugging. o -s Silent mode. Print less information what the program does. o -v Verbose mode. Print more information about what the program does. o -V Display version information and exit. COPYRIGHT
Copyright (C) 1997, 2018, Oracle and/or its affiliates. All rights reserved. This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/. SEE ALSO
For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/. AUTHOR
Oracle Corporation (http://dev.mysql.com/). MySQL 5.7 06/07/2018 REPLACE(1)
All times are GMT -4. The time now is 07:20 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy