Linux bash 中带有变量的别名
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Alias with variable in bash
提问by Deepank Gupta
I want to create an alias in bashlike this:
我想像这样创建一个别名bash：
alias tail_ls="ls -l | tail"
Thus, if somebody types:
因此，如果有人输入：
tail_ls /etc/
it will only show the last 10 files in the directory.
它只会显示目录中的最后 10 个文件。
But $1does not seem to work for me. Is there any way I can introduce variables in bash.
但$1似乎对我不起作用。有什么办法可以在bash中引入变量。
采纳答案by Maxim Sloyko
I'd create a function for that, rather than alias, and then exported it, like this:
我会为此创建一个函数，而不是别名，然后将其导出，如下所示：
function tail_ls { ls -l "" | tail; }
export -f tail_ls
Note -fswitch to export: it tells it that you are exporting a function. Put this in your .bashrcand you are good to go.
注意-f切换到export：它告诉它您正在导出一个函数。把它放在你的.bashrc身上，你就可以开始了。
回答by l0b0
tail_ls() { ls -l "$1" | tail; }
tail_ls() { ls -l "$1" | tail; }
回答by jruzafa
The solution of @maxim-sloyko did not work, but if the following:
@maxim-sloyko 的解决方案不起作用，但如果出现以下情况：
In ~/.bashrc add:
sendpic () { scp "$@" [email protected]:/www/misc/Pictures/; }Save the file and reload
$ source ~/.bashrcAnd execute:
$ sendpic filename.jpg
在 ~/.bashrc 添加：
sendpic () { scp "$@" [email protected]:/www/misc/Pictures/; }保存文件并重新加载
$ source ~/.bashrc并执行：
$ sendpic filename.jpg
original source: http://www.linuxhowtos.org/Tips%20and%20Tricks/command_aliases.htm
原始来源：http: //www.linuxhowtos.org/Tips%20and%20Tricks/command_aliases.htm
回答by innovati
If you are using the Fish shell (from http://fishshell.com) instead of bash, they write functions a little differently.
如果您使用的是 Fish shell（来自http://fishshell.com）而不是 bash，则它们编写的函数略有不同。
You'll want to add something like this to your ~/.config/fish/config.fishwhich is the equivalent of your ~/.bashrc
你会想要添加这样的东西到你~/.config/fish/config.fish的相当于你的~/.bashrc
function tail_ls
ls -l | tail
end
回答by Javier López
alias tail_ls='_tail_ls() { ls -l "" | tail ;}; _tail_ls'
回答by J. Chomel
You can define $1with set, then use your alias as intended:
您可以定义$1with set，然后按预期使用您的别名：
$ alias tail_ls='ls -l "" | tail'
$ set mydir
$ tail_ls
