Building on what others wrote, use sed to search and replace multiple spaces with a single space. In a shell (like bash) you can escape backslash by backslash. The syntax is: sed 's/word1/word2/g' input.file How to remove commas at the end of rows I would like to remove commas , at the end of each line in my file. 357. Issue the following command from the command line ./comma_remove.csh and the commas will be replaced by full stops. If you want to replace the commas with something else then overwrite the /./ with whatever you want, if it's spaces you want then use / / or for nothing use //. It does work as I have just tried it out. Replace comma with newline in sed on MacOS? Thanks for posting more info. The quotes are not a problem if you single quote your sed expression $ sed '/"foo"/ s/false/true/' file "bar": false "foo": true If you really need to match the whole pattern, fine: is used to prevent the replacement task from being applied to the last line. Any particular string in a text or a file can be searched, replaced and deleted by using regular expression with `sed command. However, many times the data may include both embedded quotation marks as well as embedded commas… Double quotes - every \ needs to be escaped three times: $ sed "s#\\\\\'#\\\'#g" a hello \' aaa afa Good reading: Remove backslashes from a text file. With this your variable value will look as below: Then again while retrieving the records from Dynamics we have to again use the replace expression to retrieve records which contains single quote in lastname. I need to eliminate the quotation marks before and after the comma-seperated digit-only elements like: foo01,"foo02",123123,45,1foo003 "foo",Foo05,,-678,900,"2FOO" Did not find a solution for this, so anyone could help out? and N. The `sed` command can be used to replace \n with a comma by using a, b, N, and $!.Here, a is used to append tasks, b is used to branch the content, N is used to go to the next line, and $! Which is four times single quote, comma, single quote, double quote , single quote. Case (c) is a very typical form of these data files, with double quotes used to enclose each field and to protect internal commas (such as "Tom Hall, Jr.") from interpretation as field separators. The command will replace each \n with a comma except the last line. Example 2: Replace \n with a comma using a, b, $! Syntax: sed find and replace text. The basic uses of `sed` command are explained in this tutorial by using 50 unique examples. sed only remove the last comma character, but I would like to remove all the commas (and maybe all other character, like:: at the end of a lines. In that case, you'll have to do as previously suggested and first past it into a text editor and do a find/replace with the single quotes. Use an address. The s is the substitute command of sed for find and replace; It tells sed to find all occurrences of ‘old-text’ and replace with ‘new-text’ in a file named input.txt; Verify that file has been updated: more input.txt; Let us see syntax and usage in details. So instead of \ write \\. alias ll='ls -lh | sed "s/ \+/ /g" | cut -f5,9 -d" " | sed "s/ /\t/g"'  But this commands performs all types of modification temporarily and the original file content is not changed by default. This helps get consistent results from cut. At the end, i run it through sed one more time to change space to tab so that it's easier to read. Can be searched, replaced and deleted by using regular expression with sed..., i run it through sed one more time to change space to tab so that 's! Basic uses of ` sed ` command are explained in this tutorial by using 50 unique.. A single space b, $ temporarily and the original file content is not changed by.... 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