Sed

Sed snippets for me to remember syntax:

Replacing the 3 figure number at the beginning of every row in a file:
sed -e s/^[0-9]\{3\}/015/ C:\Temp\search_n_replace_sed.txt

Replacing anything that isn't a semicolon on each row in a file:
sed -e "s/[^;]\+/014/" C:\Temp\search_n_replace_sed.txt