点空间（[点] [空格] [文件名]） [英] Dot space ( [dot][space][filename] )

问题描述

什么用格式[点]命令[空格] [文件名]是指？

What does a command with format [dot][space][filename] means?

示例

. ./setup.sh

此外，在.bashrc文件中，我们有一个这样的行

Also in .bashrc file we have a line like that

. "$HOME/.bashrc"

这是什么意思？

What does this mean?

推荐答案

。操作者也被称为源

据<一个href=\"http://www.unix.com/shell-programming-scripting/177636-dot-operator-space-parameter-not-set.html\">this论坛主题，第一次'。是命令源读取和指定的参数文件名执行命令。
第二 '。'是当前目录。

According to this forum thread, the first '.' is the command 'source' to read and execute commands from the filename given as argument. The second '.' is the current directory.

. ./setup.sh

是相同的

source ./setup.sh

或
源setup.sh （如果./，当前目录，在PATH环境变量）。

or source setup.sh (if the ./, the current directory, is in the PATH environment variable).

下面是用于手动
http://ss64.com/bash/source.html

这是通常用于运行在当前shell脚本来帮助建立执行环境，以及设置别名。

This is typically used to run the script in the current shell to help set up the environment for execution, as well as to set up aliases.

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