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Full Discussion: [Solved] Help with using tr - Removing white spaces
Top Forums UNIX for Dummies Questions & Answers [Solved] Help with using tr - Removing white spaces Post 302560787 by newbie_01 on Saturday 1st of October 2011 07:55:04 AM
Old 10-01-2011
[Solved] Help with using tr - Removing white spaces
Hi,

I have a file that contains whitespaces with spaces and spaces and tabs on each line and am wanting to remove the whitespaces. My version of sed is one that does not recognize \t etc.

The sed and awk one-liners below that I found via Google both does not work.
Quote:
sed:
sed 's/^[ \t]*//;s/[ \t]*$//'

awk:
awk '{gsub(/^[ \t]+|[ \t]+$/,"");print}'

So my next best option is to use tr, am using tr -d '[:space:]' < in > out and while that one works, I am unfortunately losing the line endings.

When I run the tr command

The input below:

Code:
 
server01  :/mnt/arch  :20  :15 :40 :85 :N :
server02  :/mnt/arch2 :32  :15 :40 :85 :N :

Becomes:

Code:
server01:/mnt/volarch:20:15:40:85:N:server02:/mnt/arch2:32:15:40:85:N:

Preferably, I want it to be as below:

Code:
 
server01:/mnt/volarch:20:15:40:85:N:
server02:/mnt/arch2:32:15:40:85:N:

At the moment since I don't know how to get around this, am using a while read loop that reads each line and running tr -d '[:space:]' on each line. I believe this is a bit of an overkill.

Can anyone advise whether I should be able to get the desired result using tr instead of the while loop?

Thanks in advance.
Last edited by vbe; 10-28-2011 at 05:18 AM..
 

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gitmount

gitmount(1)						      General Commands Manual						       gitmount(1)

NAME

       gitmount - GNU Interactive Tools - auto-mount script

SYNTAX

       gitmount device

DESCRIPTION

       gitmount  is a script which allows you to mount any block device without specifying the file system type.  You may now insert the floppy in
       the drive and type  ' gitmount fd0' and the first floppy will be mounted in the directory /mnt/fd0.  On Linux just press F11 or	F12.   You
       don't need to know the file system type anymore. The directories /mnt/fd0 and /mnt/fd1 are created if they don't exist.

BUGS

       Please send bug reports to:
       gnuit-dev@gnu.org

SEE ALSO

       gitfm(1) gitps(1) gitview(1) gitkeys(1) gitaction(1) gitrgrep(1) gitunpack(1)

AUTHORS

       Tudor Hulubei <tudor@cs.unh.edu>
       Andrei Pitis <pink@pub.ro>
       Ian Beckwith <ianb@erislabs.net> (Current maintainer)

																       gitmount(1)
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