Contents
How to delete lines containing a specific string in a text file?
Use the sed command to delete lines containing the specified string In the following example, we will use the action option of the sed command to delete lines containing the specified string in the text file. As follows, we delete the line that contains the string “sed” in the file. ➜ ~ sed ‘/sed/d’ text.txt
How to remove common lines between two files?
To remove common lines between two files you can use grep, comm or join command. grep only works for small files. Use -v along with -f. This displays lines from file1 that do not match any line in file2. comm is a utility command that works on lexically sorted files.
How to find and replace lines in a text file?
This method uses regular expressions to find and replace lines containing a word or phrase. This method is very powerful as you can match almost anything (such as words “beginning with”, or lines that have a specific “pattern”.) Open the text-based file using Notepad++. Press Ctrl + F to open the Find and Replace dialog.
How do you remove blank lines from a text file?
Make sure that the Replace with: text box is left blank. Click Replace All. Now, Notepad++ replaces all those matching lines with blank lines. In the Replace dialog, you’ll see the number of occurrences replaced. Next, you need to remove those blank lines. Close the Find/Replace dialog.
How to delete lines with specific string Besides SED?
There are many other ways to delete lines with specific string besides sed: And of course sed (printing the inverse is faster than actual deletion): You can use sed to replace lines in place in a file. However, it seems to be much slower than using grep for the inverse into a second file and then moving the second file over the original.
How to delete a line from a pattern?
The “N” command appends the next line of input into the pattern space. This combined with the line from the pattern match (/bar/) will be the lines that you wish to delete. You can then delete normally with the “d” command.
How can I delete the second line of a file?
If you have bar on two consecutive lines, this will delete the second line without analyzing it. For example, if you have a 3-line file bar / bar / foo, the foo line will stay. sed ‘/bar/d’ if you just want to “Remove line containing certain string” and not the next.
How to delete a range of lines in a sql file?
You can also delete a range of lines in a file. For example to delete stored procedures in a SQL file. This will remove all lines between CREATE PROCEDURE and END ;. I have cleaned up many sql files withe this sed command.