| grep --before-context=NUM PATTERN | grep command examples ~ Linux IQ : http://linuxadministrative.blogspot.com/2014/06/grep-command-examples.html | |
| grep --before-context=NUM site:stackoverflow.com | 「grep --exclude site:stackoverflow.com」の検索結果 - Yahoo!検索 : http://search.yahoo.co.jp/search@p=grep+--before-context=NUM+site%3Astackoverflow.com&rkf=1 |