code searching / searching / search engines

search multiple text files in linux for a string:
—————————————————
grep -rnw /path/to/somewhere/ -e pattern
grep -rn /path/to/somewhere/ -e pattern #without w so also search for substrings

search in debian:
—————————————————
su
cd /
find / -name "Keyword*" #search everything beginning with Keyword..
find / -iname "*keyword*" #ignore case + word can also be in the middle

code searching:
—————————————————
http://www.antepedia.com/
http://www.berlios.de/web/guest/softwareschmieden
http://www.codefetch.com/
https://github.com/search

http://code.google.com/hosting/search?q=
http://grepcode.com/
http://opensearch.krugle.org/
http://code.ohloh.net/
http://code.openhub.net/
http://pastebin.com/
http://searchcode.com/
http://symbolhound.com/

other search engines:
—————————————————
http://archive.is/
https://archive.org/
http://www.baidu.com/
http://blekko.com/
http://www.browse-search.com/
https://www.bing.com/
http://www.delta-search.com/
http://www.dhm.de/datenbank/dhm.php?seite=10
https://duckduckgo.com/
https://www.fastbot.de/ #very fast!
https://www.google.de
https://hulbee.com/
https://idw-online.de/de/
https://ixquick.com/
https://search.jesuislibre.net/
http://metacrawler.de/
https://metager.de/
http://www.metasuchmaschine.org/

http://www.netluchs.de/
https://www.privatesearch.io/
https://www.qwant.com/
https://www.reddit.com/
http://www.secury-surf.com/
http://www.shodanhq.com
https://startpage.com/
http://superuser.com/search?tab=newest&pagesize=50
https://twitter.com/search-home
https://www.unbubble.eu/
http://www.webcrawler.com/
http://de.wikipedia.org
http://www.wissenschaft.de/archiv
http://www.wolframalpha.com/
https://en.search.wordpress.com/
https://de.search.wordpress.com/
http://www.yaelp.com/
https://de.yahoo.com
https://www.yandex.com/
http://yoursearch.me/
http://youresponsive.com/

more:
http://www.ub.uni-konstanz.de/serviceangebote/suchmaschinen.html

search with ixquick on special site:
—————————————————
site:raspberrypi.org display

search in google:
based on:
https://support.google.com/websearch/answer/2466433?hl=en
—————————————————
"name_of_the_file" + "download" -name
"google hacks" filetype:pdf
link: fredfire1.wordpress.com -site:wordpress.com

google webpage optimizations: (faster pages are ranked better in SEO)
https://developers.google.com/speed/pagespeed/insights/ #check pagespeed and get improvement suggestions
http://smallseotools.com/google-pagerank-checker/
#see actually pagerank
http://youresponsive.com/ #see how your site looks on other devices

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