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I have the following line in a unix script:
head -1 $line | cut -c22-29 >> $file
I want to append this output with no newline, but rather separated with commas. Is there any way to feed the output of this command to printf? I have tried:
head -1 $line | cut -c22-29 | printf "%s, " >> $file
I have also tried:
printf "%s, " head -1 $line | cut -c22-29 >> $file
Neither of those has worked. Anyone have any ideas?
633
Assuming that the file does not already end in a newline and you simply want to append some more text without adding one, you can use the -n argument, e.g. However, some UNIX systems do not provide this option; if that is the case you can use printf , e.g. Do not print the trailing newline character.
Append to a File using the Redirection Operator ( >> ) Redirection allows you to capture the output from a command and send it as input to another command or file. The >> redirection operator appends the output to a given file.
Append Text Using >> Operator For example, you can use the echo command to append the text to the end of the file as shown. Alternatively, you can use the printf command (do not forget to use \n character to add the next line).
You just want tr in your case
tr '\n' ','
will replace all the newlines ('\n') with commas
head -1 $line | cut -c22-29 | tr '\n' ',' >> $file
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