You can remove spaces from the end of each line in a text file generated after running a command by using the following methods:
Using the sed command: The sed command is a stream editor that can be used to perform text transformations on input data. You can use the following command to remove spaces from the end of each line in a file:
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sed -i 's/[ \t]*$//' filename.txt
Using the awk command: The awk command is a powerful text processing tool that can be used to perform complex operations on text files. You can use the following command to remove spaces from the end of each line in a file:
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awk '{sub(/[ \t]+$/,"")};1' filename.txt > filename_new.txt
This will create a new file filename_new.txt with the spaces removed.
Using the tr command: The tr command is used to translate or delete characters in a text file. You can use the following command to remove spaces from the end of each line in a file:
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tr -d ' \t' < filename.txt > filename_new.txt
This will also create a new file filename_new.txt with the spaces removed.
These are just a few examples of how you can remove spaces from the end of each line in a text file generated after running a command. The specific method you choose will depend on your specific requirements and the tools you have available on your system.
It's also worth mentioning that if you want to edit the original file in-place, you can use the > operator to overwrite the original file with the new content, like this:
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sed -i 's/[ \t]*$//' filename.txt
or
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awk '{sub(/[ \t]+$/,"")};1' filename.txt > filename.txt
or
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tr -d ' \t' < filename.txt > filename.txt
In this case, be careful and make sure to backup your original file before making any changes, in case you need to restore the original content for any reason.
In conclusion, removing spaces from the end of each line in a text file is a simple process that can be accomplished using a number of different tools and techniques. By using the right tool for the job, you can ensure that your text files are clean, tidy, and ready for further processing.