2010/9/20 Eric Blake <[email protected]>: > On 09/20/2010 05:22 AM, Yann wrote: >> >> Dear all, >> >> I searched into "man cp" and the online manual, but did not find any >> clue... >> >> What is the meaning of -avrd option after cp command ? (Is it the same >> as -a option ?) > > POSIX requires support for option-letter compression, and GNU tools obey > this by virtue of getopt_long(). That is: > > cp -avrd > > is strictly equivalent to: > > cp -a -v -r -d > > The basic rule of thumb is that you can omit ' -' after any short option > that does not take an argument and which is followed by another short > option. And for short options that take mandatory arguments, such as cp -t, > you can omit the space between the option and its argument, so these are the > same: > > cp -a -t . foo > cp -at. foo
ok, thank you Eric ! ~Yann
