This article will show you how to append a string (or any data) to the end of a file under Linux/Unix. Appending is done very simply by using the append redirect operator >>. Simply use the operator in the format data_to_append >> filename and you’re done. Below are several examples:

Examples to Append Data to a File

1. To append the string “hello” to file greetings.txt

echo "hello" >> greetings.txt

2. To append the contents of the file temp.txt to file data.txt

cat temp.txt >> data.txt

3. To append the current date/time timestamp to the file dates.txt

date >> dates.txt