how to replace \ or / with sed?

Question

How to replace / or \\ in text file? I have tried to 'escape' these characters but with no success so far

echo '/// \\\\' | sed 's////some_text/'

will obviously not work.

thanks BM

Answer 1

echo "\\\\\\message\\//" | sed 's;[\\/];REPLACEMENT-TEXT;g'

Answer 2

如果您不想更改定界符，则此

sed 's/[\\\\/]/U/g' temp.txt