# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression.
sed -E 's/((?:ht|f)tps?:\\/\\/(\w+\.\w{2}[\\/\w-.]*))/<a href="$1">$1<\/a>/gi;t' <<< "http://matthiasweiss.at/asd/asd
ftp://hallo.welt
https://hallowelt.jpg
http://asdasd.aa/jojoji.jiji
mail@matthiasweiss.at
http://matthiasweiss.at
"
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html