[Modify the use of sudo commands]

packaging/deb/DEBIAN/prerm

 #!/bin/bash
 
-#path=`pwd`
 insmetaPath="/usr/local/taos/script"
-cd ${insmetaPath}
-#sudo chmod -R 744 ${insmetaPath}
-sudo ./preun.sh
 
+csudo=""
+if command -v sudo > /dev/null; then
+    csudo="sudo"
+fi
 
+${csudo} chmod -R 744 ${insmetaPath}
+cd ${insmetaPath}
+${csudo} ./preun.sh