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.
版权声明：本文内容由互联网用户自发贡献，该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容， 请发送邮件至 [email protected] 举报，一经查实，本站将立刻删除。
