I've got a huge (about half a GiB, impossible to use a usual text editor on) CSV file with fields enclosed in double quotes like "abc","def" but need a file without quotes (I am sure this is not going to break the file consistency - a comma is never used inside the values in it).

How to remove all the quotes (without introducing spaces on their places)?


tr can do that:

tr -d \" < infile > outfile

You could also use sed:

sed 's/"//g' < infile > outfile
  • 1
    Why did you removed < infile > outfile? IMHO it was more informative. – Ivan Dec 14 '12 at 9:27
  • @Ivan I thought it was probably implicit on second thought. – Chris Down Dec 14 '12 at 9:29
  • Only when for experienced command line users. Even though I a have used < before a couple of times (to import SQL scripts into MySQL and SQLite) It would be immediately obvious for me that I should use < in this case. I think it would be better to return the full command line example back for further reference of those who may need it. – Ivan Dec 14 '12 at 9:35
  • @Ivan and @Chris, I've reverted it back (pending review) to include < infile > outfile, hope that's OK. – donothingsuccessfully Dec 14 '12 at 11:22
  • Thanks, @donothingsuccessfully. I've totally mistyped the previous comment, that's a pity I can't edit it %-] – Ivan Dec 14 '12 at 13:14

Another version of sed command:

sed -i s/\"//g file.txt
  • sed stream editor

    • -i in-place (edit file in place)
    • s the substitute command
    • /replacement_from_reg_exp/replacement_to_text/ statement
    • \" quotes preceded by backslash (replacement_from_reg_exp)
    • empty string between slash delemiters (replacement_to_text)
    • g global (for replace all occurrence in line)
  • file.txt the file name

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