How do I run a shell script in Hadoop?

There are 3 ways.

1. hadoop fs -cat /tmp/test.sh|exec sh.
2. You can install HDP NFS and mount the hdfs directory on local file system from where you can execute your script.
3. You can write an oozie shell workflow and call your .

How do I run a script from a shell script?

There are a couple of different ways you can do this:

1. Make the other script executable, add the #!/bin/bash line at the top, and the path where the file is to the $PATH environment variable.
2. Or call it with the source command (alias is . ),
3. Or use the bash command to execute it, like: /bin/bash /path/to/script.

How do I run a shell script from command line arguments?

To pass an argument to your Bash script, your just need to write it after the name of your script:

1. ./script.sh my_argument.
2. #!/usr/bin/env bash.
3. ./script.sh.
4. ./fruit.sh apple pear orange.
5. #!/usr/bin/env bash.
6. ./fruit.sh apple pear orange.
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How do I view Hadoop data?

Retrieving Data from HDFS

1. Initially, view the data from HDFS using cat command. $ $HADOOP_HOME/bin/hadoop fs -cat /user/output/outfile.
2. Get the file from HDFS to the local file system using get command. $ $HADOOP_HOME/bin/hadoop fs -get /user/output/ /home/hadoop_tp/

How do I run a Linux script automatically?

There is more than one way to do this.

1. Put the command in your crontab file. The crontab file in Linux is a daemon that performs user-edited tasks at specific times and events.
2. Put a script containing the command in your /etc directory. Create a script such as “startup.sh” using your favorite text editor.
3. Edit the /rc.

How do you run a script continuously in Linux?

How to Run or Repeat a Linux Command Every X Seconds Forever

1. Use watch Command. Watch is a Linux command that allows you to execute a command or program periodically and also shows you output on the screen.
2. Use sleep Command. Sleep is often used to debug shell scripts, but it has many other useful purposes as well.

What is shift in shell script?

Shift is a builtin command in bash which after getting executed, shifts/move the command line arguments to one position left. The first argument is lost after using shift command. This command takes only one integer as an argument.

How do I run a shell script in Windows?

Execute Shell Script Files

1. Open Command Prompt and navigate to the folder where the script file is available.
2. Type Bash script-filename.sh and hit the enter key.
3. It will execute the script, and depending on the file, you should see an output.