Bash, как удалить первые n строки файла
# Example usage (3 options):
tail -n +43 input_file # Print from the 43rd line on
sed 1,42d input_file # Print from the 43rd line on
sed -i 1,42d input_file # Remove the first 42 lines in place (meaning
# that the file is changed without having to print the output to a
# new file)
Charles-Alexandre Roy