Merge pull request #927 from yujinqiu/fix-error-output

Capture command error output

release/install-release.sh

@@ -206,7 +206,7 @@ startV2ray(){
 copyFile() {
     NAME=$1
     MANDATE=$2
-    ERROR=`cp "/tmp/v2ray/v2ray-${NEW_VER}-linux-${VDIS}/${NAME}" "/usr/bin/v2ray/${NAME}"`
+    ERROR=`cp "/tmp/v2ray/v2ray-${NEW_VER}-linux-${VDIS}/${NAME}" "/usr/bin/v2ray/${NAME}" 2>&1`
     if [[ $? -ne 0 ]]; then
         colorEcho ${YELLOW} "${ERROR}"
         if [ "$MANDATE" = true ]; then