complete readme doc

README.md

@@ -1,2 +1,36 @@
-# redistool
-delete keys by pattern
+# RedisTool
+
+As redis-cli can not do some commands like delete by pattern, I wrote this tool to help do such things. Features will add one by one later.
+
+## Features:
+
+* ### show keys match pattern and delete them
+
+	#### Usage:
+
+	    NAME:
+	       ./redistool keys - show all keys matching pattern
+	    
+	    USAGE:
+	       ./redistool keys [command options] [arguments...]
+	    
+	    OPTIONS:
+	       -h "127.0.0.1"       Server hostname (default: 127.0.0.1).
+	       -p "6379"            Server port (default: 6379).
+	       -a                   Password to use when connecting to the server.
+	       -n "0"               Database number.
+	       -r "<pattern>"       *               matches all
+	                            h?llo           matches hello, hallo and hxllo
+	                            h*llo           matches hllo and heeeello
+	                            h[ae]llo        matches hello and hallo, but not hillo
+	                            h[^e]llo        matches hallo, hbllo, ... but not hello
+	                            h[a-b]llo       matches hallo and hbllo
+	       -d                   delete keys matching pattern
+
+	#### Example:
+
+		#list matched keys
+		./redistool keys -h "127.0.0.1" -p 6379 -a "qwer" -n 1 -r "hello*"
+		
+		#delete matched keys
+		./redistool keys -h "127.0.0.1" -p 6379 -a "qwer" -n 1 -r "hello*" -d