Updated Install preparations (markdown)

2016-10-04 16:25:01 +08:00 · 2016-10-04 16:25:01 +08:00 · 534dab1a00
parent 4cd67f0bee
commit 534dab1a00
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--- a/Install-preparations.md
+++ b/Install-preparations.md
@ -28,6 +28,8 @@ yum -q -y install nc

 # 3. alpine

+The default `nc` tool doesn't support `-4` , `-6` and local address, So, please install `netcat-openbsd` to support all the options.
+
 ```
 apk --no-cache add -f openssl curl netcat-openbsd
 ```