curl -sAOpera "http://www.google.com/search?q=linux" | grep -Pio '(?< =href=['\''"])[^:]+://[^'\''"]+'
curl -sAOpera "http://www.google.com/search?q=linux" | egrep -ie "< *HREF=(.*?)>" | cut -d "\"" -f 2 | grep ://
Vía CommandLinefu
curl -sAOpera "http://www.google.com/search?q=linux" | grep -Pio '(?< =href=['\''"])[^:]+://[^'\''"]+'
curl -sAOpera "http://www.google.com/search?q=linux" | egrep -ie "< *HREF=(.*?)>" | cut -d "\"" -f 2 | grep ://
Vía CommandLinefu