Eduardo A. Bustamante López wrote:
This definition (
http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap03.html#tag_03_230
) states:
3.230 Name
In the shell command language, a word consisting solely of underscores,
digits, and alphabetics from the portable character s
This definition (
http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap03.html#tag_03_230
) states:
3.230 Name
In the shell command language, a word consisting solely of underscores,
digits, and alphabetics from the portable character set. The first character
of a name is not a
Under section 2.5.3, Shell Variables, it mentions:
LC_CTYPE
Determine the interpretation of sequences of bytes of text data as
characters (for example, single-byte as opposed to multi-byte
characters), which characters are defined as letters (character class
alpha) and characters (chara
