How to remove blank line from a file in unix

Tommy Leonhardsen Tommy Leonhardsen 1. Welcome to the site, and thank you for your contribution. Unfortunately, strings only looks at "printable characters followed by a non-printable character". Space is "printable", so it will print lines that only contain spaces. The only reason why it apparently may work is because it has a lower threshold of what it considers a string the default is 4 characters , so any line that contains less than 4 spaces and nothing else will be discarded - but so will be any line that contains less than 4 alphabetic characters.

Lines with more than 4 spaces will be printed. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science.

Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually. I ran following command and it worked. Garfield Carneiro Garfield Carneiro 1 1 1 bronze badge. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. I want to remove blank spaces in file. Please let me know how can i do that by RedHat Commands.

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Find all posts by carlr. Here is an awk solution: awk NF file. Zombo Zombo 1, 16 16 silver badges 18 18 bronze badges. To remove empty lines, you could squeeze new line repeats with tr : cat file. This produces 6 lines, not 4 as OP requested. Without modifying the file just print on the standard output : cat test.

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The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually.