Answers:
基本上是因为当你跑步 ./aliases
,它创建了一个存在别名的过程,但在你之后立即结束 source
它适用于您当前的bash过程。
获得帮助 source
,你需要阅读 man bash
。
为了省你省事:
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 containing 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.
当您将其作为可执行脚本运行时,shell会将其自身的副本分叉为子进程以运行该脚本。这意味着对别名的任何更改:
相比之下,当你 source
剧本:
man csh
, 作为适当的。