How to use sed to extract substring-Stack Overflow?

How to use sed to extract substring-Stack Overflow?

If you are really sure, that your input will be always formated this way, you can use cut . It’s faster than sed and awk: It will ‘cut’ all the lines in the file based on ” d elimiter, and will take the 2 nd f ield , which is what you wanted. Thanks for contributing an answer to Stack Overflow!

How to indicate a line in a SED file?

To indicate the line just pass the line number, in your case 3, before s or before the initiating quote char (just like in vim). Please take a look at info sed. For example, 3.2 and 4.7 are of particular interest to you.

Is it safe to use sed to parse XML?

\\1 – reference to that string we found in the brackets above. / end of the substitute string. basically s/search for this/replace with this/ but we’re telling him to replace the whole line with just a piece of it we found earlier. You should not parse XML using tools like sed, or awk. It’s error-prone.

How to address POP3 _ server _ name in SED?

Using sed is a little less intuitive. (Thanks, I’m aware of the irony.) Address the line that contains POP3_SERVER_NAME anywhere. Substitute an empty string for all the text from the beginning of the line to the optional space following “=”.

How to substitute only a first match occurrence using SED?

The greedy behaviour of a sed substitution command will by default substitute first match occurrence on every line.

When to use cut instead of sed or AWK?

If input changes, and before name parameter you will get new-line character instead of space it will fail some day producing unexpected results. If you are really sure, that your input will be always formated this way, you can use cut . It’s faster than sed and awk:

Can you extract rows and columns from CSV files?

Is bash capable of handling extracting rows and columns from csv files? Hoping I don’t have to resort to python.. So far I can only get awk to print out either each row, or each column of my CSV file, but not specific cols/rows like this case! Can bash do this?

How can I substitute CSE for count in SED?

Substitute text but only if some other text is not found in the string The following `sed` command will replace the ‘Count’ value in the line that does not contain the text, ‘CSE’. dept.txt file contains two lines that do not contain the text, ‘CSE’. So, the ‘ Count ‘ text will be replaced by 80 in two lines.

How are two replace commands used in SED?

Two replace commands are used in the following `sed` command. Here, the text, ‘ Count ‘ will be replaced by 100 in the line that contains the text, ‘CSE ‘ and the text, ‘ Count’ will be replaced by 70 in the line that contains the searching pattern, ‘ EEE’.