Write to file via echo with hash?

Question

bash

If I write: echo addmodule>>/usr/file.conf(conditionally), then it is recorded.
And what if I need to write not addmodule, but #addmodule, that is, with a hash #? Then it's gone. Doesn't record. How to be? I tried to put it in quotes, it didn't work.

Answer 1

You need to escape the character with a backslash
echo \#addmodule>>./file.txt

Answer 2

You can use cat as an alternative.
cat <<EOF>/tmp/test.txt
TestTestTest
EOF