Update README.md: Install it as a kubectl plugin

README.md

@@ -33,6 +33,28 @@ Usage: kube-knife [-dhs] [-C value] [-c value] [-m value] [-n value] [-p value]
  -s, --skip-filter  skip filtering, does not use regex
 ```
 
+## Install it as a `kubectl knife` plugin:
+1 Download or compile the binary
+2 Rename it to kubectl-knife
+3 Make sure the binary is included in your $PATH
+```
+$ kubectl knife -h
+Usage: kubectl-knife [-dhs] [-C value] [-c value] [-m value] [-n value] [-p value] [-S value] [parameters ...]
+ -C, --command=value
+                    command to run, if empty, just list pods
+ -c, --context=value
+                    context regex
+ -d, --debug        debug mode
+ -h, --help         display this help
+ -m, --max-concurrency=value
+                    max concurrency, default: 10
+ -n, --namespace=value
+                    namespace regex
+ -p, --pod=value    pod regex
+ -S, --shell=value  default: sh
+ -s, --skip-filter  skip filtering, does not use regex
+```
+
 ## TODO
 - Improve pod listing output, and make it more useful
 - Dynamically tries /bin/sh, /bin/dash, /bin/bash, /bin/ash ===> sh -c "ls -d /tmp" || bash -c "ls -d /tmp" || ash -c "ls -d /tmp"  || dash -c "ls -d /tmp"