Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
1.3k views
in Technique[技术] by (71.8m points)

请问 2>&1 放在命令行尾部和中间有什么区别吗?

image.png


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Answer

0 votes
by (71.8m points)

第一个标准错误输出输出到终端,标准输出输出到output.txt中;
第二个标准输出和标准错误输出都会输出到output.txt中。

解析:bash执行是有循序的,执行第一条命令时,标准错误输出输出到标准输出,而这时标准输出输出到终端,然后标准输出才输出到output.txt。


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome to OStack Knowledge Sharing Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...