How can I redirect and append both stdout and stderr to a file with Bash?

Question

To redirect *stdout* to a truncated file in Bash, I know to use: cmd > file.txt To redirect *stdout* in Bash, appending to a file, I know to use: cmd >> file.txt To redirect both *stdout* and *stderr* to a truncated file, I know to use: cmd &> file.txt How do I redirect both *stdout* and *stderr* appending to a file? `cmd &>> file.txt` did not work for me.

Answer 1

One way to do it is to run a commands like this.

<command> > dump.txt 2>&1

This will dump both the stderr and stdout to the file "dump.txt".

dump.txt == file being where the stderr & stdout are being redirected.

2 == stderr

1 == stdout