bash中的点（"."）命令

在看docker的启动脚本时，看到其中有一行". /etc/sysconfig/docker"。这"."是什么意思？

百度得知，"."命令就是"source"命令的另一种写法，是bash内建的命令。source命令比较常用，就是在当前bash环境下运行目标脚本内容。

https://www.jb51.net/article/103657.htm中解释的比较清楚。

贴一个bash的manual：

        .  filename [arguments]
       source filename [arguments]
              Read and execute commands from filename in the current shell environment and return the exit status of the last command
              executed from filename.  If filename does not contain a slash, file names in PATH are used to find the  directory  con鈁m
              taining  filename.   The file searched for in PATH need not be executable.  When bash is not in posix mode, the current
              directory is searched if no file is found in PATH.  If the sourcepath option to the shopt  builtin  command  is  turned
              off,  the  PATH is not searched.  If any arguments are supplied, they become the positional parameters when filename is
              executed.  Otherwise the positional parameters are unchanged.  The return status is the  status  of  the  last  command
              exited within the script (0 if no commands are executed), and false if filename is not found or cannot be read.

标签：executed,source,filename,命令,file,PATH,bash
来源： https://blog.csdn.net/dillanzhou/article/details/100606518