Bash redirection: since `&> foo` means `> foo 2>&1`, is there a `&>>`?

Following would redirect the Stdout and Stderr to logfile:

$ command &> logfile

How do I do this redirection without overwrite logfile 开发者_运维知识库during next run of command. Something like >> if it was a plain redirection.

---

You could attach stderr (2) to stdout (1) and then redirect stdout in append-mode:

command >> logfile 2>&1

The 2>&1 bit attaches stderr to stdout and then you redirect stdout to append to logfile in the usual manner.

---

From the BASH manual

The format for appending standard output and standard error is:
       &>>word
This is semantically equivalent to
       >>word 2>&1

So, $ command &>> logfile.

EDIT: The shorthand version seems to be a feature in bash version 4, so for compability reasons you should use command >> logfile 2>&1.

---

According to the documentation, what you're after is what you may have guessed:

$ command &>> logfile

Notice the doubled >> to append.

---

You answered your question in your question....

$ command &>> logfile