Документах ваши друзья. От PS> man about_Redirection
The Windows PowerShell redirection operators are as follows.
Operator Description Example
-------- ---------------------- ------------------------------
<snip>
2>&1 Sends errors (2) and Get-Process none, Powershell 2>&1
success output (1)
to the success
output stream.
<snip>
The syntax of the redirection operators is as follows:
<input> <operator> [<path>\]<file>
If the specified file already exists, the redirection operators that do not
append data (> and n>) overwrite the current contents of the file without
warning. However, if the file is a read-only, hidden, or system file, the
redirection fails. The append redirection operators (>> and n>>) do not
write to a read-only file, but they append content to a system or hidden
file.
возможного дубликата [В оболочке, что "2> & 1"?] (Http://stackoverflow.com/questions/818255/in-the-shell-what-is-21) – x0n
'2> & 1' выглядит как IO-перенаправление для меня ... но я не так уж хорошо знаком с powershell. –
@ x0n отвечает на Windows? Для меня это похоже на Unix; есть ли разница? – BlackHatSamurai