Shulou(Shulou.com)06/03 Report--

Pipes and redirects: >

> / tmp/var.out overwrite output (overwrite original content)

> >: append output

/ *

Set built-in commands:

-C (overrides are not allowed)-enable the function

+ C (restore override) + turn off function

Ls / var > | / tmp/var.out (- C does not work)

* * /

Set-C: prohibit the use of override redirection on existing files

If the output is forcibly overwritten, use > |

Set + C: turn off the above functions

2 >: redirect error output

2 > >: append method

Ls / varr > / tmp/var3.out 2 > / tmp/err.out (two redirects)

& >: redirect standard output or error output to the same file

& > >: append method

Ls / var6 & > / tmp/var0.out

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