Currently the files in HDP 2.2 package looks like this.
$ ll /usr/hdp/2.2.0.0-2041/
total 16
drwxr-xr-x 8 root root 4096 Jan 23 07:55 etc
drwxr-xr-x 8 root root 4096 Jan 28 09:04 hadoop
drwxr-xr-x 3 root root 4096 Jan 23 07:54 ranger-hdfs-plugin
drwxr-xr-x 6 root root 4096 Jan 23 07:54 zookeeper
$ ll /usr/hdp/current/
total 0
lrwxrwxrwx 1 root root 28 Jan 23 07:55 hadoop-client -> /usr/hdp/2.2.0.0-2041/hadoop
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-hdfs-client -> /usr/hdp/2.2.0.0-2041/hadoop-hdfs
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-hdfs-datanode -> /usr/hdp/2.2.0.0-2041/hadoop-hdfs
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-hdfs-journalnode -> /usr/hdp/2.2.0.0-2041/hadoop-hdfs
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-hdfs-namenode -> /usr/hdp/2.2.0.0-2041/hadoop-hdfs
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-hdfs-nfs3 -> /usr/hdp/2.2.0.0-2041/hadoop-hdfs
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-hdfs-portmap -> /usr/hdp/2.2.0.0-2041/hadoop-hdfs
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-hdfs-secondarynamenode -> /usr/hdp/2.2.0.0-2041/hadoop-hdfs
lrwxrwxrwx 1 root root 38 Jan 23 07:55 hadoop-mapreduce-client -> /usr/hdp/2.2.0.0-2041/hadoop-mapreduce
lrwxrwxrwx 1 root root 38 Jan 23 07:55 hadoop-mapreduce-historyserver -> /usr/hdp/2.2.0.0-2041/hadoop-mapreduce
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-yarn-client -> /usr/hdp/2.2.0.0-2041/hadoop-yarn
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-yarn-nodemanager -> /usr/hdp/2.2.0.0-2041/hadoop-yarn
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-yarn-resourcemanager -> /usr/hdp/2.2.0.0-2041/hadoop-yarn
lrwxrwxrwx 1 root root 33 Jan 23 07:55 hadoop-yarn-timelineserver -> /usr/hdp/2.2.0.0-2041/hadoop-yarn
lrwxrwxrwx 1 root root 26 Jan 23 07:55 hive-client -> /usr/hdp/2.2.0.0-2041/hive
lrwxrwxrwx 1 root root 25 Jan 23 07:55 pig-client -> /usr/hdp/2.2.0.0-2041/pig
lrwxrwxrwx 1 root root 25 Jan 23 07:55 tez-client -> /usr/hdp/2.2.0.0-2041/tez
lrwxrwxrwx 1 root root 31 Jan 23 07:54 zookeeper-client -> /usr/hdp/2.2.0.0-2041/zookeeper
$ ll /usr/hdp/2.2.0.0-2041/etc/
total 24
drwxr-xr-x 2 root root 4096 Jan 28 09:04 bash_completion.d
drwxr-xr-x 2 root root 4096 Jan 28 09:04 default
drwxr-xr-x 3 root root 4096 Jan 23 07:55 hadoop
drwxr-xr-x 3 root root 4096 Jan 23 07:55 rc.d
drwxr-xr-x 3 root root 4096 Jan 23 07:55 security
drwxr-xr-x 3 root root 4096 Jan 23 07:54 zookeeper
$ ll /etc/hadoop/conf -d
drwxr-xr-x 2 root root 4096 Jan 28 09:04 /etc/hadoop/conf
Can it have the following symbol links ? So we can use /usr/hdp/current to point to all directories in /usr/hdp/2.2.0.0-2041
/usr/hdp/current/etc => /usr/hdp/2.2.0.0-2041/etc
/usr/hdp/current/hadoop => /usr/hdp/2.2.0.0-2041/hadoop
/usr/hdp/current/hadoop-hdfs => /usr/hdp/2.2.0.0-2041/hadoop-hdfs
/usr/hdp/current/hadoop-yarn => /usr/hdp/2.2.0.0-2041/hadoop-yarn
/usr/hdp/current/hadoop-mapreduce => /usr/hdp/2.2.0.0-2041/hadoop-mapreduce
/usr/hdp/current/zookeeper => /usr/hdp/2.2.0.0-2041/zookeeper