An empty string is treated the same as stderr, and will result in logs being sent to standard error(which will be the Web server error log in most cases).
When a file operand does not select at least one archive member, pax will write these file operand pathnames in a diagnostic message to standard error and then exit with a non-zero exit status.
Sets of radius and response to a point source are written into the redirected standard output, hoge. dat the FWHM is written in the standard error output.
In the latter case, if the-s option has not been specified, cmp writes to standard error that EOF was reached in the shorter file(before any differences were found).
Directs only the standard output to file dirlist, because the standard error was duplicated from the standard output before the standard output was redirected to dirlist.
If a file name contains any of the delimiting characters used by xargs(1), a diagnostic message is displayed on standard error, and the file is skipped.
The standard error descriptor also is open for writing and is used for error output, whereas standard output is used for ordinary output. These(and other) descriptors can be mapped to objects other than the terminal; such mapping is called I/O redirection, and all the standard shells permit users to do it.
If while doing a copy, pax detects a file is about to overwrite itself, the file is not copied, a diagnostic message is written to standard error and when pax completes it will exit with a non-zero exit status.
Once the termcap entry is retrieved, the window size, backspace, interrupt, and line kill characters(among many other things) are set and the terminal and tab initialization strings are sent to the standard error output.
If parameter is null or unset, the expansion of word(or a message to that effect if word is not present) is written to the standard error and the shell, if it is not interactive.
Otherwise for all the other operational modes( read, write, and copy), pathnames are written and flushed to standard error without a trailing<newline> as soon as processing begins on that file or archive member.
Indicate Error if Null or Unset. If parameter is unset or null, the expansion of word(or a message indicating it is unset if word is omitted) is written to standard error and the shell exits with a nonzero exit status.
標準エラー。
Standard Error stderr.
標準エラーへ出力。
Print to standard error output.
標準エラーへメッセージを出力。
Print a message to standard error output.
それが、標準エラーです。
Thus standard error is.
標準エラーが2つあります。
Two standard errors are shown.
標準エラーが2つあります。
And we can take away two standard errors.
標準出力と標準エラーを同じファイルにリダイレクトする。
Redirecting Standard Output and Standard Error to Same File.
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