To create a data pipeline using a Bash script, you can use a combination of Bash commands and tools to extract data from a source system, apply transformations to the data, and load it into a destination system.
Here is an example of a simple Bash script that implements a data pipeline:
#!/bin/bash
# Extract data from the source system
mysql -uuser -ppassword -e "SELECT * FROM mytable" > data.csv
# Transform the data
sed -i "s/,[^,]*$//" data.csv
# Load the data into the destination system
psql -Uuser -dmydatabase -c "\COPY mytable FROM 'data.csv' DELIMITER ',' CSV HEADER"
This script uses the mysql command to extract data from a MySQL database, and saves the data to a CSV file named data.csv. It then uses the sed command to remove the last column of data from the CSV file. Finally, it uses the psql command to load the data into a PostgreSQL database.
This script is a very simple example of a data pipeline, and it assumes that the source and destination systems are already set up and accessible from the machine where the script is running. You can customize the script to fit your specific requirements and use different tools and commands as needed.
For more information about Bash scripting and the commands used in this example, see the https://ryanstutorials.net/bash-scripting-tutorial and the https://www.gnu.org/software/bash/manual/bash.html
