Remove Tabs from file.

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# 1  
Old 09-07-2009
Remove Tabs from file.

I was trying to remove tabs from the file using the below command it works when run on command prompt but doesnt works when operated on a file.

echo "        New name" | sed -e 's/[ \t]*//'

# 2  
Old 09-07-2009
It's not tab but whitespace...

echo "        New name" | tr  -d '[:blank:]'

# 3  
Old 09-07-2009
It will work on the file, but sed, by default, does not alter the file itself. Some versions of sed support the '-i' switch (in-place editing):
sed -i -e 's/[ \t]*//' yourfile

If yours doesn't, you can either create a temporary file:
sed -e 's/[ \t]*//' yourfile > yourtempfile
cp yourtempfile yourfile

or use Perl:
perl -i -pe 's/[ \t]+//' yourfile

# 4  
Old 09-08-2009
None of them works when a file contains tabs , can anyone suggest something.
# 5  
Old 09-08-2009
A simple mod of pludi's perl example works for me:
perl -i -pe 's/[ \t]+//g' yourfile

Of course this removes blanks as well as tabs because of the space character in front of the \.
# 6  
Old 09-08-2009
Just checked (shouldn't code when tired):
perl -i -pe 's/[ \t]+//g' yourfile

If this doesn't work then it's not tabs you have to delete.
# 7  
Old 09-08-2009
For the tabs, the command line as follow works fine...

cat file (with tabs) | tr -d '\t'

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