How do I add text to the beginning of a file in Bash?

Hi I want to prepend text to a file. For example I want to add tasks to the beginning of a todo.txt file. I am aware of echo 'task goes here' >> todo.txt but that adds the line to the end of the file (not what I want).

[kobake]

“sed -i '1s/^/task goes here\n/' todo.txt”テキストファイル先頭行追加

[igtm]

先頭行に文字列を追加する方法。“echo 'task goes here' | cat - todo.txt > temp && mv temp todo.txt”