在Mac终端中使用变量创建别名

Question

How do you use variables in an alias? For example if pbcopy will allow me to access the clipboard (copied ip address) and assign it to $ip I could copy an IP address and then use an alias such as the below failed example.

alias go='ip=pbpaste | ssh $ip -l pete'

Answer 1

我通常使用pbpaste / pbcopy ，但您可能希望找到具有历史记录的东西供您使用。

Answer 2

无需创建变量或管道，只需使用子shell：

alias go='ssh $(pbpaste) -l pete'

Answer 3

Another option is to use a function in place of an alias, as functions can take arguments:

function go {
    ssh "$1" -l pete
}

After copying the IP address, you can type "go ", paste the IP address with Command-V, and hit return.

You can also duplicate the accepted answer to avoid having to paste the address manually:

function go {
    ssh $(pbpaste) -l pete
}

so the real message here is to start thinking in terms of shell functions instead of aliases, since according to the bash man page

For almost every purpose, aliases are superseded by shell functions.