使用notify-send和exec时出错

Question

var exec = require('child_process').exec;

exec('notify-send -t 5000 -i "Hello Karl"', function (err, stdout, stderr){
    console.log('stdout: ' + stdout);
    console.log('stderr: ' + stderr);
    if (err !== null)
        throw err;
});

我得到了错误：

Error: Command failed: /bin/sh -c notify-send -t 5000 -i "Hello Karl"
No summary specified.

Answer 1

notify-send -t 5000 "Hello Karl"

这是我输入它的命令的错误。