diff --git a/xCAT-test/autotest/testcase/packimg/cases0 b/xCAT-test/autotest/testcase/packimg/cases0
index 2caa1550f..c02e3d512 100644
--- a/xCAT-test/autotest/testcase/packimg/cases0
+++ b/xCAT-test/autotest/testcase/packimg/cases0
@@ -2,7 +2,8 @@ start:packimage_o_p_a_m
 os:Linux
 description:
 cmd:copycds $$ISO
-cmd:mv /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak
+cmd:ls /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg;if [ $? -eq 0 ];then mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.bak;fi 
+cmd:ls /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz;if [ $? -eq 0 ];then mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak;fi
 cmd:genimage __GETNODEATTR($$CN,os)__-__GETNODEATTR($$CN,arch)__-netboot-compute
 check:rc==0
 cmd:ls -l /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg
@@ -11,12 +12,14 @@ cmd:packimage -o __GETNODEATTR($$CN,os)__ -p compute -a __GETNODEATTR($$CN,arch)
 check:rc==0
 cmd:ls -l /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz
 check:rc==0
-cmd:mv /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz
+cmd:mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz
+cmd:mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.bak /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg
 end
 
 start:packimage_p_a_o
 os:Linux
-cmd:mv /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak
+cmd:ls /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg;if [ $? -eq 0 ];then mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.bak;fi
+cmd:ls /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz;if [ $? -eq 0 ];then mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak;fi
 cmd:genimage __GETNODEATTR($$CN,os)__-__GETNODEATTR($$CN,arch)__-netboot-compute
 check:rc==0
 cmd:ls -l /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg
@@ -25,15 +28,15 @@ cmd:packimage -p compute -a __GETNODEATTR($$CN,arch)__ -o __GETNODEATTR($$CN,os)
 check:rc==0
 cmd:ls -l /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz
 check:rc==0
-cmd:mv /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz
+cmd:mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz
+cmd:mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.bak /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg
 end
 
-
-
 start:packimage_imagename
 os:Linux
 description:
-cmd:mv /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak
+cmd:ls /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg;if [ $? -eq 0 ];then mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.bak;fi
+cmd:ls /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz;if [ $? -eq 0 ];then mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak;fi
 cmd:genimage __GETNODEATTR($$CN,os)__-__GETNODEATTR($$CN,arch)__-netboot-compute
 check:rc==0
 cmd:ls -l /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg
@@ -42,10 +45,10 @@ cmd:packimage __GETNODEATTR($$CN,os)__-__GETNODEATTR($$CN,arch)__-netboot-comput
 check:rc==0
 cmd:ls -l /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz
 check:rc==0
-cmd:mv /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz
+cmd:mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz.bak /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.gz
+cmd:mv -f /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg.bak /install/netboot/__GETNODEATTR($$CN,os)__/__GETNODEATTR($$CN,arch)__/compute/rootimg
 end
 
-
 start:packimage_h
 os:Linux
 description:packimage -h
@@ -53,7 +56,6 @@ cmd:packimage -h
 check:rc==0
 end
 
-
 start:packimage_v
 os:Linux
 description:packimage -v