How to redirect both stdout and stderr to a file [duplicate]

问题

This question already has an answer here:

• How to redirect and append both stdout and stderr to a file with Bash? 7 answers

I am running a bash script that creates a log file for the execution of the command

I use the following

Command1 >> log_file
Command2 >> log_file

This only sends the standard output and not the standard error which appears on the terminal.

Can I log both the stderr and stdout logged to a file?

回答1:

If you want to log to the same file:

command1 >> log_file 2>&1

If you want different files:

command1 >> log_file 2>> err_file

回答2:

The simplest syntax to redirect both is:

command &> logfile

If you want to append to the file instead of overwrite:

command &>> logfile

回答3:

You can do it like that 2>&1:

 command > file 2>&1

回答4:

Use:

command >>log_file 2>>log_file

回答5:

Please use command 2>file Here 2 stands for file descriptor of stderr. You can also use 1 instead of 2 so that stdout gets redirected to the 'file'

来源：https://stackoverflow.com/questions/7526971/how-to-redirect-both-stdout-and-stderr-to-a-file