Install with yarn global add genpwd or npm i -g genpwd for command line.

Add as dependency if you need it in code.

To use on command line just do,

# by default will generate password between 100 and 140 characters
genpwd
# or if you want a certain length
genpwd 64
# or using the alias
pwdgen 72

You can also just set it up directly...

sudo nano /usr/bin/genpwd

#!/usr/bin/env node

process.title = 'genpwd'

let args = process.argv.slice(0);

args.shift();
args.shift();

function rnum() {
	return Math.floor(Math.random() * 1000000000);
}

let size = 100 + rnum() % 40;
if (args.length > 0) {
	size = parseInt(args[0]);
}

// everything, except 0, 1, l, o, O
let keys = '23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ'.split('');

let pass = [];
for (let i = 0; i < size; ++i) {
	pass.push(keys[rnum() % keys.length]);
}

console.log();
console.log('   ' + pass.join(''));
console.log();

sudo chmod u+x /usr/bin/genpwd