如何获取别名值?

在简单的情况下,您可以重复别名。根据手册: The first word of the replacement text is tested for aliases, but a word that is identical to an alias being expanded is not expanded a second time. 因此,这是有效的:

user@host: alias f='echo foo'
user@host: f
foo
user@host: alias g='f bar'
user@host: g
foo bar

在更复杂的情况下,您应该切换到函数。例如:

e() {
  eza --long --recurse --dereference "$@"
}

et() {
  e "$@" --tree
}

请注意,函数几乎总是比别名更受欢迎,因为函数通常更容易编写(不需要额外的引号或特殊字符的转义),并且在支持参数方面更灵活。手册中Aliases条目的最后一行甚至指出: For almost every purpose, shell functions are preferred over aliases.