bash glob

 * Bash 不支援 regex, 而它支援的叫 globbing

Syntax

• "?"          # Question mark match any single character
• "*"          # Asterisk match zero or more characters
• "[a-z]"     # Square Bracket match the character from the range
• "^"         # Caret with Square Bracket("[]") for negating the sense of a match

Notes

• "*" will not match filenames that start with a dot
• echo * 相當於 ls
• Filename expansion can match dotfiles,
  but only if the pattern explicitly includes the dot as a literal character
  ( *hide_file, ?hide_file, [.]hide_file 是 ls 不到的, 要用 ls .hide_file )

Example

touch a.sh b.sh c.sh d.sh a1.sh a2.sh .hide_file

ls *                  # a1.sh  a2.sh  a.sh  b.sh  c.sh  d.sh

ls a?.sh            # a1.sh  a2.sh

ls [b-d]*          # b.sh  c.sh  d.sh

ls [^a-c]*        # d.sh

ls .hide_file