bash 未找到 sed 命令
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Sed command not found
提问by sykatch
I have this code:
我有这个代码：
if [ -d "$PATH" ]; then
ABSPATH=$( cd "`echo "" | sed 's/[^/]*$//'`";pwd)
fi
when I run it, I get this sed: command not found.Any command I put inside this "if" blog writes this message, XXX:command not found. I have no idea why. I have exactly the same code elsewhere in my script and it is fine there.
当我运行它时，我得到了这个sed: command not found。我在这个“if”博客中放入的任何命令都会写下这条消息，XXX:command not found。我不知道为什么。我的脚本中的其他地方有完全相同的代码，在那里很好。
回答by kojiro
The nature of your program* snippet implies that you have just overwritten PATH. PATHis an important environment variablethat lets the shell know where to find commands… commands like sed. If you overwrite it, sedwill not be found.
您的 program* 片段的性质意味着您刚刚覆盖了PATH. PATH是一个重要的环境变量，它让 shell 知道在哪里可以找到命令……像sed. 如果你覆盖它，sed将不会被发现。
Use another name; even lowercase pathwill work fine.
使用另一个名称；即使是小写path也能正常工作。
*I'm fairly confident that you overwrote PATH because PATH should not be a directory –?it should be a colon-separated list of directories. If [ -d $PATH ]is true it either implies you have a very restrictive context for PATH, or, more likely, you have overwritten it.
*我相当有信心你覆盖了 PATH，因为 PATH 不应该是一个目录——？它应该是一个以冒号分隔的目录列表。如果[ -d $PATH ]为真，则表示您对 PATH 的上下文有非常严格的限制，或者更有可能的是，您已经覆盖了它。
