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

Question

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How to redirect and append both stdout and stderr to a file with Bash? (8 answers)

Closed 4 years ago.

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?

Answer 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

Answer 2

The simplest syntax to redirect both is:

command &> logfile

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

command &>> logfile

Answer 3

You can do it like that 2>&1:

 command > file 2>&1

Answer 4

Use:

command >>log_file 2>>log_file

Answer 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'