append is a simple command-line tool that adds a string to the start or end of every line in a text file.
Install the package using pip:
pip install append
Use append from the command line:
append -s "start_string" -e "end_string" input.txt -o output.txt
-s, --start: String to add at the start of each line (optional).
-e, --end: String to add at the end of each line (optional).
filename: Input file (optional, reads from stdin if omitted).
-o, --output: Output file (optional, writes to stdout if omitted).
Add >> to the start and << to the end of each line:
append -s ">> " -e " <<" example.txt -o result.txt
You can also use append with pipes. For example, adding /phpinfo.php to the end of each URL in a file:
cat urls.txt | append -e '/phpinfo.php'
This will append /phpinfo.php to each line read from urls.txt.