Delete empty lines file using sed

Note: In all the above examples, the sed command prints the contents of the file on the unix or linux terminal by removing the lines. However the sed command does not remove the lines from the source file. To Remove the lines from the source file itself, use the -i option with sed command. If you dont wish to delete the lines from the original source file you can redirect the output of the sed command to another file. Delete first line or header line The d option in sed command is used to delete a line.

Delete last line or footer line or trailer line The following sed command is used to remove the footer line in a file. Delete particular line This is similar to the first example. The sed command is known as a stream editor.

The sed command is used in Linux to do basic text transformation. Remove or delete that particular line that matches the given patterns. Removing lines with regular expressions. Using the sed command, we can remove the lines depending on the environment by using -i.

Sed '4,7! Prateek Jangid A passionate Linux user for personal and professional reasons, always exploring what is new in the world of Linux and sharing with my readers. Next SED - Substitution. The information will be used subject to terms and conditions, for advertising purposes. SED - Substitution. You have to substitute 'N' with the line number and 'd' is to delete the line. You can delete the first line from a file using the same syntax as described in the previous example.

You can delete a range of lines from a file. You can use! This will delete all lines except the given range To delete all blank lines from a file run the following command. An important point to note is using this command, empty lines with spaces will not be deleted.