Confused about redirecting stderr


 
Thread Tools Search this Thread
Top Forums UNIX for Beginners Questions & Answers Confused about redirecting stderr
Prev   Next
# 1  
Old 02-16-2019
Confused about redirecting stderr

I know that

Code:
mmmmm 2> error.txt

will send the error message to the specified file instead of the screen. However, I have seen

Code:
>&2

in some scripts, and I can't get it to do anything. A source said it sends stdout and stderr to a file. What file?


Ubuntu 18.04.2; Xfce 4.12.3; kernel 4.15.0-45-generic; bash 4.4.19(1); Dell Inspiron-518

Last edited by vbe; 02-16-2019 at 03:19 PM..
 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Lost redirecting stderr & stdout to 3 files - one each plus combined

Hi folks I need/want to redirect output (stdout, stderr) from an exec call to separate files. One for stderr only and two(!) different (!) ones for the combined output of stderr and stdout. After some research and testing i got this so far : (( exec ${command} ${command_parameters} 3>&1... (6 Replies)
Discussion started by: MDominok
6 Replies

2. Shell Programming and Scripting

Preserve output order when redirecting stdout and stderr

Hi, I already searched through the forum and tried to find a answer for my problem but I didn't found a full working solution, thats way I start this new thread and hope, some can help out. I wonder that I'm not able to find a working solution for the following scenario: Working in bash I... (8 Replies)
Discussion started by: Boemm
8 Replies

3. Shell Programming and Scripting

Is there a way to tee stderr from a command that's redirecting error to a file?

I'm not a complete novice at unix but I'm not all that advanced either. I'm hoping that someone with a little more knowledge than myself has the answer I'm looking for. I'm writing a wrapper script that will be passed user commands from the cron... Ex: ./mywrapper.sh "/usr/bin/ps -ef |... (1 Reply)
Discussion started by: sumgi
1 Replies

4. Shell Programming and Scripting

Redirecting STDERR to a file from within a bash script

I am trying to redirect the output from stderr to a log file from within a bash script. the script is to long to add 2> $logfile to the end of each command. I have been trying to do it with the command exec 2> $logfile This mostly works. Unfortunately, when a read command requires that anything be... (5 Replies)
Discussion started by: vockleya
5 Replies

5. Shell Programming and Scripting

noob question about redirecting stderr

I dont know what I am doing wrong but I would like to redirect the stderr output to a file? the specific command is this time wget http://www.something.com/somefile.bin All I want to see is time's output which is stderr so I can see how long the file download took. I've tried redirecting... (2 Replies)
Discussion started by: trey85stang
2 Replies

6. Shell Programming and Scripting

Redirecting stderr problem

% ls -ld /usr /foo ls: /foo: No such file or directory drwxr-xr-x 14 root wheel 512 May 18 02:49 /usr % ls -ld /usr /foo 1>/dev/null/ /dev/null/: Not a directory. % ls -ld /usr /foo 2>/dev/null/ /dev/null/: Not a directory. ^^Why why why doesn't this work for me. Furthermore, where is... (7 Replies)
Discussion started by: phpfreak
7 Replies

7. Shell Programming and Scripting

Confused about redirecting output from awk.

I have a simple script written in awk whose purpose is to go through some php files and replace some strings. Naturally, I want the changes to be written out to the files. The script looks generally as follows: { gsub(/'replacethis'/, "with this"); # a bunch of these print $0 > FILENAME }... (3 Replies)
Discussion started by: face1
3 Replies

8. Shell Programming and Scripting

Redirecting STDERR message to STDOUT & file at same time

Friends I have to redirect STDERR messages both to screen and also capture the same in a file. 2 > &1 | tee file works but it also displays the non error messages to file, while i only need error messages. Can anyone help?? (10 Replies)
Discussion started by: vikashtulsiyan
10 Replies

9. Shell Programming and Scripting

Redirecting stderr while live

If I forget to set up stderr redirection on execution of a script, is there a way to set that redirection post-exec? In other words, if I have a script running and no errors are being logged... and then I remember that I forgot the 2>&1 on the script... can I turn it on after the fact? ...and... (1 Reply)
Discussion started by: jjinno
1 Replies

10. Shell Programming and Scripting

redirecting STDOUT & STDERR

In bash, I need to send the STDOUT and STDERR from a command to one file, and then just STDERR to another file. Doing one or the other using redirects is easy, but trying to do both at once is a bit tricky. Anyone have any ideas? (9 Replies)
Discussion started by: jshinaman
9 Replies
Login or Register to Ask a Question
GRC(1)							      General Commands Manual							    GRC(1)

NAME
grc - frontend for generic colouriser grcat(1) SYNOPSIS
grc [options] command [args] DESCRIPTION
grc will execute command command with optional parameters [args] piping its stdout or stderr into grcat, with apropriate configuration file. Configuration file for grc is determined by /etc/grc.conf file. Format of /etc/grc.conf: each entry consists of 2 lines, between entries there can be any number of empty lines or lines beginning with # (comments) First line is regular expression, second line the name of configuration file for grcat. Configuration file after the first regular expression matching command [args] will be passed to grcat as its configuration file OPTIONS
--help Show summary of options. --version Display version. -e --stderr Redirect error output. Unless -s is selected as well, this cancels redirection of standard output via grcat -s --stdout Redirect standard output. Used to redirect standard output together with --stderr option. --colour=x x is one of on off auto --colour=on will colourise (default) --colour=off will just execute command without colourising. --colour=auto will test if standard output is a tty, and colourise only when it is. SEE ALSO
grcat(1) AUTHOR
Written by Radovan Garabik <garabik @ kassiopeia.juls.savba.sk> GRC(1)