Execute shell commands on one or more remote computers via SSH
npm install remote-execVery simple wrapper for ssh2 to execute shell commands on one or more remote computers in node via SSH
``
npm install remote-exec
`javascript`
var rexec = require('remote-exec');
rexec(hosts $3
hosts can be a string, an array of strings, or an array of objects
if hosts is an array of objects, the name key of each object will be used to connect to the host
javascript
var rexec = require('remote-exec');// see documentation for the ssh2 npm package for a list of all options
var connection_options = {
port: 22,
username: 'myuser',
privateKey: require('fs').readFileSync('~/.ssh/rsa_id'),
passphrase: 'mypassphrase'
};
var hosts = [
'host1.somewhere.com',
'host2.somewhere.else.com',
'250.110.0.13'
];
var cmds = [
'ls -l',
'cat /etc/hosts'
];
rexec(hosts, cmds, connection_options, function(err){
if (err) {
console.log(err);
} else {
console.log('Great Success!!');
}
});
`$3
javascript
// commands can be parameterized using the {{parameterName}} syntax
// parameters can be set at the global or host level// global parameters should be set via the params key of the connections options
var connection_options = {
port: 22,
username: 'myuser',
privateKey: require('fs').readFileSync('~/.ssh/rsa_id'),
passphrase: 'mypassphrase',
params: {
myParam: 'something',
anotherParam: 'something else'
}
}
// to set a parameter for a specific host:
var hosts = [
{name: 'host1.somewhere.com', myParam: 'this overrides the global myParam value', blah: 'this is an additional parameter at the host level'},
{name: 'host2.somewhere.else.com'} // this host will only get the global parameters
];
var cmds = [
'echo "{{myParam}}"'
];
rexec(hosts, cmds, connection_options, function(err){
if (err) {
console.log(err);
} else {
console.log('Great Success!!');
}
});
`$3
javascript
// by default all output for remote computers is routed to process.stdout and process.stderr
// but this can be overridden by passing valid writable streams to the stdout and/or stderr
// keys of the connection optionsvar rexec = require('remote-exec')
, fs = require('fs');
var connection_options = {
port: 22,
stdout: fs.createWriteStream('./out.txt'),
stderr: fs.createWriteStream('./err.txt')
}
rexec('myserver.com', 'cat /proc/cpuinfo', connection_options);
``