ls -R | grep settings.xml

locate -br '^settings.xml$'

locate  reads  one or more databases prepared by updatedb(8) and writes
   file names matching at least one of the PATTERNs  to  standard  output,
   one per line.

   -b, --basename
          Match  only  the base name against the specified patterns.  This
          is the opposite of --wholename.
   -r, --regexp REGEXP
          Search for a basic regexp REGEXP.  No PATTERNs  are  allowed  if
          this  option  is used, but this option can be specified multiple
          times.

find / -xdev -name settings.xml

$ locate settings.xml
/usr/share/mime/application/x-cisco-vpn-settings.xml