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--help and help are successful commands so output should not go to error.
QE teams have requested this change, also users doing docker help | less
or docker run --help | less would expect this to work.
Usage statement should only be printed when the user asks for it.
Errors should print error message and then suggest the docker COMMAND --help
command to see usage information.
The current behaviour causes the user to have to search for the error message
and sometimes scrolls right off the screen. For example a error on a
"docker run" command is very difficult to diagnose.
Finally erros should always exit with a non 0 exit code, if the user
makes a CLI error.
Docker-DCO-1.1-Signed-off-by: Dan Walsh <dwalsh@redhat.com> (github: rhatdan)
48 lines
1.3 KiB
Markdown
48 lines
1.3 KiB
Markdown
% DOCKER(1) Docker User Manuals
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% Docker Community
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% JUNE 2014
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# NAME
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docker-info - Display system-wide information
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# SYNOPSIS
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**docker info**
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[**--help**]
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# DESCRIPTION
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This command displays system wide information regarding the Docker installation.
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Information displayed includes the number of containers and images, pool name,
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data file, metadata file, data space used, total data space, metadata space used
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, total metadata space, execution driver, and the kernel version.
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The data file is where the images are stored and the metadata file is where the
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meta data regarding those images are stored. When run for the first time Docker
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allocates a certain amount of data space and meta data space from the space
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available on the volume where `/var/lib/docker` is mounted.
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# OPTIONS
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**--help**
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Print usage statement
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# EXAMPLES
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## Display Docker system information
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Here is a sample output:
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# docker info
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Containers: 14
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Images: 52
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Storage Driver: aufs
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Root Dir: /var/lib/docker/aufs
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Dirs: 80
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Execution Driver: native-0.2
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Kernel Version: 3.13.0-24-generic
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Operating System: Ubuntu 14.04 LTS
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CPUs: 1
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Total Memory: 2 GiB
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# HISTORY
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April 2014, Originally compiled by William Henry (whenry at redhat dot com)
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based on docker.com source material and internal work.
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June 2014, updated by Sven Dowideit <SvenDowideit@home.org.au>
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