Why does this compound command report errors when copying directories?
if one executes the following two commands in one line, as follows,
rm -rf dir ; cp -r dir2 dir
it may complain that cp can not create directory
dir/subdir: File exists
but if these two commands are executed in two lines, no errors will be thrown. I am just wandering what is the difference? and more importantly, how to execute two commands in one line, with the effect exactly the same as by two lines...
PS: what is in
dir2 is hugh, typically 4gb