crowdsec patch uuid for BSD systems

gistfile1.go

diff --git c/cmd/crowdsec-cli/machines.go w/cmd/crowdsec-cli/machines.go
index bbdf11c..33e87e9 100644
--- c/cmd/crowdsec-cli/machines.go
+++ w/cmd/crowdsec-cli/machines.go
@@ -7,6 +7,7 @@ import (
        "io/ioutil"
        "math/big"
        "os"
+       "runtime"
        "strings"
        "time"
 
@@ -59,17 +60,37 @@ func generatePassword(length int) string {
        return string(buf)
 }
 
+func readUUID() (string, error) {
+       var uuidfile string
+
+       switch runtime.GOOS {
+       case "freebsd":
+               uuidfile = "/etc/hostid"
+       case "openbsd":
+               uuidfile = "/etc/machine-id"
+       // linux
+       default:
+               uuidfile = uuid
+       }
+
+       bID, err := ioutil.ReadFile(uuidfile)
+       if err != nil {
+               return "", err
+       }
+
+       return string(bID), nil
+}
+
 func generateID() (string, error) {
        id, err := machineid.ID()
        if err != nil {
                log.Debugf("failed to get machine-id with usual files : %s", err)
        }
        if id == "" || err != nil {
-               bID, err := ioutil.ReadFile(uuid)
+               id, err = readUUID()
                if err != nil {
                        return "", errors.Wrap(err, "generating machine id")
                }
-               id = string(bID)
        }
        id = strings.ReplaceAll(id, "-", "")[:32]
        id = fmt.Sprintf("%s%s", id, generatePassword(16))