環境変数はアルファベット、数字、アンダースコアだけ

[大城希乃樺]

[大城希乃樺]

man bashのDEFINITIONSのところのnameに書いてある

DEFINITIONS
The following definitions are used throughout the rest of this document.
blank A space or tab.
word A sequence of characters considered as a single unit by the shell. Also known as a token.
name A word consisting only of alphanumeric characters and underscores, and beginning with an
alphabetic character or an underscore. Also referred to as an identifier.
metacharacter
A character that, when unquoted, separates words. One of the following:
| & ; ( ) < > space tab
control operator
A token that performs a control function. It is one of the following symbols:
|| & && ; ;; ( ) |

[大城希乃樺]

ms > export PATH++++==
ms > export