sed¶

Use another character instead of / for regex¶

https://www.gnu.org/software/sed/manual/sed.html#The-_0022s_0022-Command

The / characters may be uniformly replaced by any other single character within any given s command. The / character (or whatever other character is used in its stead) can appear in the regexp or replacement only if it is preceded by a \ character.

e.g. echo blargh | sed 's#blargh#hello#' is valid