diff --git a/common.sh b/common.sh
index 899af77da647083ce5b3abd5d8800d7b5a5002f3..6c84cd856efd90d815e14d264ab7a1e89689b48f 100644
--- a/common.sh
+++ b/common.sh
@@ -58,7 +58,7 @@ function tryWget(){
         PROXY="http://${phost}:${pport}"
     fi
 
-    if which wget &>/dev/null; then
+    if which wget &> /dev/null; then
         WGETBIN="$(which wget)"
     else
         WGETBIN="${PREFIX}/bin/wget"
@@ -82,8 +82,8 @@ function getNetworkInterface()
 
     for interface in $(/sbin/route | grep default | awk '{print $NF}'); do
         # Send ICMP ECHO_REQUEST to root server I or J
-        if ping -c 1 -I ${interface} 192.36.148.17 > /dev/null 2>&1 ||
-           ping -c 1 -I ${interface} 192.58.128.30 > /dev/null 2>&1 ; then
+        if ping -c 1 -I ${interface} 192.36.148.17 &> /dev/null ||
+           ping -c 1 -I ${interface} 192.58.128.30 &> /dev/null ; then
             break
         fi
     done