Brace Expansion
- can generate arbitrary strings
- does not verify if the expanded names are existing files
- are generated in strict order
Example
echo a{b,c,d}e
gets
abe ace ade
Example: generating a Maildir-style Mailbox
mkdir -p Maildir/{cur,new,tmp}
emulating the tool maildirmake
mkdir -m 700 -p Maildir/{cur,new,tmp}