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Old 01-11-2012, 07:25 AM   #1
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Removing the double quotes from the file globally

Hi Linux Gurus,

I am trying to remove all the double quotes from a file. Actually I have 48 files in all and some of them are pretty huge (as big as 12 gigs). So for example if one line in the file is like below -


Then I want it to become the following -


I want to be able to remove it globally.
I tried using "sed substitution" but I guess I am not using it correctly.

Any help is much appreicated.

Old 01-11-2012, 09:53 AM   #2
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Make a backup copy of your data. Use the backup to test.
sed s/\"//g  yourFile
When you've convinced yourself that this actually does what you want, add the -i option to the sed command, and it will edit 'in-place', rather than printing to standard output.

--- rod.
Old 01-11-2012, 10:52 AM   #3
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I would instead suggest using the following variation, for readability reasons mostly:
sed 's/"//g'  infile
sed 's/["]//g'  infile	#regex variation
Single quotes escape double quotes, and vice versa. You can also enclose the character(s) to be deleted in [..] regex character class brackets, allowing you to delete multiple characters at once.

Or consider using tr instead:
tr -d '"' <infile >outfile
tr is more efficient at doing simple character substitutions/deletions than sed, but it only works through stdin, so you have to send the output to a new file.
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