man ページで指定オプションを調べる簡単な方法

grep -A を使うと簡単ですよ。

たとえば、man curl で -k オプションについて調べたいとき

takuya@rena:~/Desktop$ man curl | grep -A 9 '^\s*\-k'
854:       -k, --insecure
855-              (SSL)  This  option explicitly allows curl to perform "insecure"
856-              SSL connections and transfers. All SSL connections are attempted
857-              to  be  made secure by using the CA certificate bundle installed
858-              by default. This makes  all  connections  considered  "insecure"
859-              fail unless -k, --insecure is used.
860-
861-              See     this    online    resource    for    further    details:
862-              http://curl.haxx.se/docs/sslcerts.html
863-

grep -A 続く行数

これはオプションについて調べるときに便利すぎる