Tar tips
--------
If moving files from one machine to another using NFS mounted FS's,
it is better to do the reads over the network and the writes locally.


To move whole directory structures from the current directory to a target directory:
	tar cf - . | (cd todir; tar xfBp -)
	

NOTE:  One advantage of this over cp -r is that permissions and ownership
       are retained and symbolic links are also copied.


From the tar man page:
     B         Block. Force tar  to perform  multiple  reads  (if
               necessary)  to read exactly enough bytes to fill a
               block. This function modifier enables tar  to work
               across  the  Ethernet,  since  pipes  and  sockets
               return partial blocks even when more data is  com-
               ing.  When  reading from standard input, '-', this
               function modifier is selected by default to ensure
               that tar  can recover from short reads.

     p         Restore the named files to their  original  modes,
               and  ACLs  if  applicable,  ignoring  the  present
               umask(1). This is the default behavior if  invoked
               as  super-user  with  the x function letter speci-
               fied. If super-user, SETUID and sticky information
               are  also  extracted,  and files are restored with
               their original owners and permissions, rather than
               owned by root. When this function modifier is used
               with the c function, ACLs are created in the  tar-
               file  along  with  other  information. Errors will
               occur when a tarfile with  ACLs  is  extracted  by
               previous versions of tar .