LINUX command behind the common meaning> / DEV / NULL, and 2> & 1
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2019-06-26 11:03:39
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- > Symbol to redirect
- > / dev / null output to the null device, output information indicates lost.
- 2> & 1 will be output to the standard error output to the standard output device (usually the screen)
has three default i / o,
- 0 is the standard input, the keyboard is generally
- 1 is the standard output, usually the screen
- 2 is the standard error, and sometimes you can see on the screen, but do not see the redirection of file it is
Origin blog.csdn.net/xiebingsuccess/article/details/91859860