How do I remove blank space in Unix?

How do I remove blank space in Unix?

How do I remove blank space in Unix?

Simple solution is by using grep (GNU or BSD) command as below.

  1. Remove blank lines (not including lines with spaces). grep . file.txt.
  2. Remove completely blank lines (including lines with spaces). grep “\S” file.txt.

How do I remove whitespace at the end of a line in Linux?

Remove just spaces: $ sed ‘s/ *$//’ file | cat -vet – hello$ bye$ ha^I$ # tab is still here! Remove spaces and tabs: $ sed ‘s/[[:blank:]]*$//’ file | cat -vet – hello$ bye$ ha$ # tab was removed!

How do you trim a file in Linux?

How to use the truncate command

  1. To reduce the file size to 5 bytes, we would use the following truncate command to specify that we want our file to be exactly 5 bytes.
  2. You can also use other units, such as K for kilobytes, M for megabytes, G for gigabytes, etc.
  3. To empty the file completely, use -s 0 in your command.

How do I trim a string in bash?

You can use the following bash commands to delete and trim whitespace form strings or text:

  1. sed command.
  2. awk command.
  3. cut command.
  4. tr command.
  5. Bash path expansion feature.

How do I remove white spaces from a string?

How do you remove all white spaces from a string in java?

  1. public class RemoveAllSpace {
  2. public static void main(String[] args) {
  3. String str = “India Is My Country”;
  4. //1st way.
  5. String noSpaceStr = str.replaceAll(“\\s”, “”); // using built in method.
  6. System.out.println(noSpaceStr);
  7. //2nd way.

How do I trim a file in bash?

Another different way to remove the contents of a file is using the “truncate” command. The file “empty.sh” has been used here again with the same text script. By running the bash command, the output will be as same as in the image. After that, we will use the “truncate” command followed by the “-s” keyword.

What does cut command do in Linux?

The cut command is a command-line utility for cutting sections from each line of a file. It writes the result to the standard output. It’s worth noting that it does not modify the file, but only works on a copy of the content.

How do I trim a word in shell script?

“trim a string shell script” Code Answer

  1. # Basic syntax:
  2. sed ‘s/^ *//g’
  3. ​
  4. # Example usage:
  5. echo ‘ text’ # Printing without sed command.
  6. –> text.
  7. echo ‘ text’ | sed ‘s/^ *//g’ # Pipe to sed command.
  8. –> text.