Concise Guides, Well Explained
Let us understand how to copy files with in HDFS (from one HDFS location to another HDFS location). We can use hdfs dfs -cp command to copy files with in HDFS.One need to have at least read permission on source folders or files and write permission on target folder for cp command to work as…
We can copy files from HDFS to local file system either by using copyToLocal or get command. Syntax of the command is:hdfs dfs -get <hdfs path> <local path>hdfs dfs -copyToLocal <hdfs path> <local path>
We can copy files from local file system to HDFS either by using copyFromLocal or put command. syntax is:hdfs dfs -put <path of local file> <hdfs location>hdfs dfs -copyFromLocal <path of local file> <hdfs location? or we can do
Now let us have a look at how to create directories and manage ownership. You should be able to create folders under your home directory. We can delete non empty directory using hdfs dfs -rm -R and empty directory using hdfs dfs -rmdir. We will explore hdfs dfs -rm in detail later.
Now let us walk through different options we have with hdfs ls command to list the files. We can get usage by running hdfs dfs -usage ls. Usage: hadoop fs [generic options] -ls [-C] [-d] [-h] [-q] [-R] [-t] [-S] [-r] [-u] [-e] [<path> …] -ls [-C] [-d] [-h] [-q] [-R] [-t] [-S] [-r] [-u]…
