青蛇探针：https://github.com/souying/serverMmon
安装完以后提示这个：
[ol]============================================================================
Note: No service file has been installed for starting the daemon
automatically. Such setup will need to be created manually
depending on the used environment. See the included documentation.
============================================================================
make[3]: Leaving directory '/tmp/vnstat-2.10'
make[2]: Leaving directory '/tmp/vnstat-2.10'
make[1]: Leaving directory '/tmp/vnstat-2.10'
Synchronizing state of vnstat.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable vnstat
insserv: warning: current start runlevel(s) (empty) of script `vnstat' overrides LSB defaults (2 3 4 5).
insserv: warning: current stop runlevel(s) (0 1 2 3 4 5 6) of script `vnstat' overrides LSB defaults (0 1 6).
Created symlink /etc/systemd/system/vnstatd.service → /lib/systemd/system/vnstat.service.
Created symlink /etc/systemd/system/multi-user.target.wants/vnstat.service → /lib/systemd/system/vnstat.service.[/ol]复制代码
然后探不到流量，请问怎么解决，系统是debian11
