Merge pull request #6805 from hashicorp/issue-6804-sysctl-path

change sysctl call to use absolute path

sdk/freeport/ephemeral_linux.go

@@ -14,7 +14,7 @@ const ephemeralPortRangeSysctlKey = "net.ipv4.ip_local_port_range"
 var ephemeralPortRangePatt = regexp.MustCompile(`^\s*(\d+)\s+(\d+)\s*$`)
 
 func getEphemeralPortRange() (int, int, error) {
-	cmd := exec.Command("sysctl", "-n", ephemeralPortRangeSysctlKey)
+	cmd := exec.Command("/sbin/sysctl", "-n", ephemeralPortRangeSysctlKey)
 	out, err := cmd.Output()
 	if err != nil {
 		return 0, 0, err