Show Password


UNIX for Advanced & Expert Users

Expert-to-Expert. Learn advanced UNIX, UNIX commands, Linux, Operating Systems, System Administration, Programming, Shell, Shell Scripts, Solaris, Linux, HP-UX, AIX, OS X, BSD.

How to replace special characters?

👤 Login to reply
Thread Tools Search this Thread Display Modes
Old 04-21-2017
Ravi.K Ravi.K is offline
Registered User
Join Date: Jan 2017
Last Activity: 21 April 2017, 12:20 PM EDT
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
How to replace special characters?

Hi Team,

I have data like this.


Would like to add zero (0) before the decimal point where there is no zero as


How to replace |*|. with |*|0.

I tried below command which didn't work

echo '|*|.5|*|0.2|*|A.B|*' | sed 's/\|\*\|\./\|\*\|0\./g'


Last edited by Corona688; 04-21-2017 at 02:47 PM..
Sponsored Links
Old 04-21-2017
Padow1 Padow1 is offline
Registered User
Join Date: Sep 2016
Last Activity: 23 May 2017, 2:58 PM EDT
Posts: 37
Thanks: 0
Thanked 8 Times in 7 Posts
$ echo '|*|.5|*|0.2|*|A.B|*|' | sed 's/|\./|0\./'

Sponsored Links
Old 04-21-2017
Corona688 Corona688 is offline Forum Staff  
Mead Rotor
Join Date: Aug 2005
Last Activity: 17 July 2018, 11:41 AM EDT
Location: Saskatchewan
Posts: 22,724
Thanks: 1,193
Thanked 4,350 Times in 4,005 Posts
To keep the forums high quality for all users, please take the time to format your posts correctly.

First of all, use Code Tags when you post any code or data samples so others can easily read your code. You can easily do this by highlighting your code and then clicking on the # in the editing menu. (You can also type code tags [code] and [/code] by hand.)

Second, avoid adding color or different fonts and font size to your posts. Selective use of color to highlight a single word or phrase can be useful at times, but using color, in general, makes the forums harder to read, especially bright colors like red.

Third, be careful when you cut-and-paste, edit any odd characters and make sure all links are working property.

Thank You.

The UNIX and Linux Forums
Old 04-21-2017
wisecracker's Unix or Linux Image
wisecracker wisecracker is offline
Registered User
Join Date: Jan 2013
Last Activity: 17 July 2018, 1:37 AM EDT
Location: Loughborough
Posts: 1,288
Thanks: 388
Thanked 352 Times in 277 Posts
Why use sed?
Longhand using OSX 10.12.4, default bash terminal.
(Assumption bash is available.)
Interactive mode is a great way to test.
Last login: Fri Apr 21 22:35:25 on ttys000
AMIGA:amiga~> STRING='|*|.5|*|0.2|*|A.B|*|'
AMIGA:amiga~> PREFIX="|*|0"
AMIGA:amiga~> echo "$PREFIX${STRING:3}"
AMIGA:amiga~> _

The Following User Says Thank You to wisecracker For This Useful Post:
jim mcnamara (04-21-2017)
Sponsored Links
Old 04-22-2017
MadeInGermany MadeInGermany is offline Forum Staff  
Join Date: May 2012
Last Activity: 17 July 2018, 1:14 PM EDT
Location: Simplicity
Posts: 4,156
Thanks: 365
Thanked 1,419 Times in 1,275 Posts
Post#4 requires the match at the beginning of the string.
Post#2 does only one substitution and also does it for A.B.
The following requires a digit after the dot, and because it is part of the match must mark it in \( \) and put it back via a back-reference. Also it does the substitution globally.
echo '|*|.5|*|0.2|*|A.B|*|' | sed 's/|\(\.[0-9]\)/|0\1/g'

Sponsored Links
👤 Login to reply

« Previous Thread | Next Thread »
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

More UNIX and Linux Forum Topics You Might Find Helpful
Thread Thread Starter Forum Replies Last Post
How to replace special characters? ken002 Shell Programming and Scripting 25 11-05-2012 09:10 AM
Replace special characters with Escape characters? laknar Shell Programming and Scripting 8 01-05-2012 11:40 PM
Replace special characters ratheeshjulk Shell Programming and Scripting 0 12-22-2011 08:18 PM
How to replace special characters in vi? rogerben Solaris 2 08-03-2011 05:53 AM
Using sed to replace special characters nimo Shell Programming and Scripting 5 08-12-2010 02:42 AM

All times are GMT -4. The time now is 03:29 PM.

Unix & Linux Forums Content Copyrightę1993-2018. All Rights Reserved.