Question

under /tmp directory I have the following files

 file1
 file2

when I run the following find command with -regex , find command not match the files
why?

  find /tmp  -regex '/file(\d{1,3})/'

Answer 1

From the man find page:

-regex pattern

File name matches regular expression pattern. This is a match on the whole path, not a search. For example, to match a file named ./fubar3, you can use the regular expression .*bar. or .*b.*3, but not f.*r3.

Also, \d and {m,n} doesn’t seem to be supported. The following works:

find /tmp -regex ".*file[0-9]+$"