Unable to import certificate to cacerts

My requirement is to import a certificate for maven repositories into the global keystore. The certificate file is named maven-cacert.cer . I am using following command from `C:\Program Files\Java\jdk1.6.0_20\bin\` from `cmd` ``` keytool -importcert -trustcacerts -alias c:\maven-cacert.cer -file c:\maven-cacert.cer.der -keystore $JAVA_HOME\jre\lib\security\cacerts ``` as `maven-cacert.cer` file is in `C` directory after pressing enter it asked to put password and after giving password it is saying like ``` keytool error: java.io.FileNotFoundException: $JAVA_HOME\jre\lib\security\cacerts (The system cannot find the path specified ``` I also tried ``` keytool -importcert -trustcacerts -alias c:\maven-cacert.cer -file c:\maven- cacert.cer.der -keystore \usr\java/jdk1.6.0_20/bin/java\jre\lib\security\cacerts ``` but getting same output Please help what is going wrong with my command while `cacerts` file is inside `$JAVA_HOME\jre\lib\security\` directory.