# Howto Replace distribtion a to b in the source.list with sed
<code bash>
OLDDISTRI=bullseye
NEWDISTRI=bookworm
sed -i 's/\$OLDDISTRI/$NEWDISTRI/gi' /etc/apt/sources.list.d/*.list
sed -i 's/\%OLDDISTRI/$NEWDISTRI/gi' /etc/apt/*.list
</code>