查看电脑hostid,hostid修改

sudo apt-get install coreutils cat /etc/hosts192.168.0.209 localhost.localdomain localhost

ubuntu 下安装的hostid 命令并不能作为唯一认证码，hostid很可能是主机的IP地址经过转换得到，例如主机IP地址为192.168.0.209，那么可能得到了hostid就是 a8c0d100。
192.168.0.209 --> 168.192.209.0 --> a8.c0.d1.00–> a8c0d100

通过cpu的ID作为唯一认证码较为可靠。

z@localhost:~$ cat /proc/cpuinfo Processor: AArch64 Processor rev 4 (aarch64)processor: 0processor: 1processor: 2processor: 3Features: fp asimd aes pmull sha1 sha2 crc32 CPU implementer: 0x41CPU architecture: AArch64CPU variant: 0x0CPU part: 0xd03CPU revision: 4Hardware: sun50iw6Serial: 9c0001400c0164911f50

获取cpu id命令

z@localhost:~$ cat /proc/cpuinfo | grep Serial | awk -F ':' {'print $2'} 9c0001400c0164911f50