redirecting stdout and stderr to file using bash

0 votes

In order to redirect stdout to a file in bash I use:

cmd > file.txt

To redirect stdout using Bash while appending I use:

cmd >> file.txt

and for both stdout and stderr to a truncated file I use:

cmd &> file.txt

How do I redirect both stdout and stderr appending to a file? cmd &>> file.txt did not work for me

But I want to redirect both stdout and stderr appending to a file. How do I do that?

Mar 19 in Linux Administration by DragonLord999
• 8,380 points
39 views

1 answer to this question.

0 votes
cmd >>file.txt 2>&1

Bash always executes and redirects from left to right:

  1. >>file.txt: simply opens the text file in append mode and puts the stdout there
  2. 2>&1: this redirects stderr to the same place where stdout is ging. which in this case is the file opened in append mode. The &1 is using the descriptor which was being used by stdout
answered Mar 19 by ajs3033
• 7,280 points

Related Questions In Linux Administration

0 votes
1 answer
0 votes
1 answer

pipe to clipboard using Bash

Try xclip; xclip - command line interface to ...READ MORE

answered Jun 17 in Linux Administration by Shubham
• 13,290 points
20 views
0 votes
1 answer

To attach a file using mail command on Linux

$ echo | mutt -a syslogs.tar.gz admin@domain.org READ MORE

answered Jun 28 in Linux Administration by Upasana
• 8,530 points
66 views
0 votes
1 answer

copy and create destination directory using bash

mkdir -p "$d" && cp file "$d" try ...READ MORE

answered Jul 15 in Linux Administration by Upasana
• 8,530 points
24 views
0 votes
1 answer
0 votes
1 answer

Redirecting output to a file and stdout

The command you want is named tee; foo ...READ MORE

answered May 31 in Linux Administration by Shubham
• 13,290 points
26 views
0 votes
1 answer
0 votes
1 answer

How do I set variable if a specific package version is installed in CFEngine?

Here is what you can do.Just use packagesmatching to ...READ MORE

answered Jul 12, 2018 in Other DevOps Questions by Atul
• 10,240 points
80 views
0 votes
1 answer

how to loop through the content of a file using bash

One of the ways to do it ...READ MORE

answered Feb 15 in Linux Administration by ajs3033
• 7,280 points
73 views
0 votes
1 answer

How to collect all output in one file?

You can use 2> to redirect it: foo ...READ MORE

answered Mar 1 in Linux Administration by ajs3033
• 7,280 points
27 views