problem with htracr

[chemdemo]

htracr lib has installed via npm, after running htracr 8888 command show this error message:

module.js:356
  Module._extensions[extension](this, filename);
                               ^
Error: libpcap.so.1: cannot open shared object file: No such file or directory
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)
    at require (module.js:380:17)
    at Object.<anonymous> (/root/local/lib/node_modules/htracr/node_modules/pcap/pcap.js:6:21)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Module.require (module.js:364:17)