How to run shell script file using nodejs?

Question

I need to run a shell script file using nodeJS that executes a set of Cassandra DB commands. Can anybody please help me on this.

inside db.sh file:

create keyspace dummy with   replication = {'class':'SimpleStrategy','replication_factor':3}  create table dummy (userhandle text, email text primary key , name text,profilepic) 

Answer 1

You could use "child process" module of nodejs to execute any shell commands or scripts with in nodejs. Let me show you with an example, I am running a shell script(hi.sh) with in nodejs.

hi.sh

echo "Hi There!" 

node_program.js

const { exec } = require('child_process'); var yourscript = exec('sh hi.sh',         (error, stdout, stderr) => {             console.log(stdout);             console.log(stderr);             if (error !== null) {                 console.log(`exec error: ${error}`);             }         }); 

Here, when I run the nodejs file, it will execute the shell file and the output would be:

Run

node node_program.js 

output

Hi There! 

You can execute any script just by mentioning the shell command or shell script in exec callback.

Hope this helps! Happy coding :)

Answer 2

You can execute any shell command using the shelljs module

 const shell = require('shelljs')   shell.exec('./path_to_your_file')