search and replace file content

sed.sh

# mac
sed 's/<target>/<replacement>/g' <inputfile> > <outputfile>

# inplace
sed -i '.bck' 's/<target>/<replacement>/g' <inputfile>

# only if FOO appears in the line
sed 'FOO/s/<target>/<replacement>/g' <inputfile>

# multiple command
sed -e 's/<target>/<replacement>/g' -e 's/<target>/<replacement>/g' <inputfile>

# + delimiter
sed 's+<target>+<replacement>+g' <inputfile>

# s: search and replace
# g: global
# I: case insensitive
# delimiter can be + instead of slash to avoide confusion with similar characters
# -i : save file with given suffix