sed replace \ with \\ code example

Example 1: sed replace in file

sed -i 's/foo/bar/g' hello.txt

Example 2: replace using sed

#on my mac
sed -i -e 's/old-text/new-text/g' text.txt

Example 3: replace text with sed

sed -i 's/old-text/new-text/g' input.txt

Example 4: replace tab sed

sed -i.bak $'s/\t/  /' file.txt	#replace tab with sed command