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Improve group information on USB device

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As the group can be something else than dialout on some systems, mention
this on user manual.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Miika Turkia 2015-12-28 15:05:15 +02:00 • committed by Dirk Hohndel
parent f3c8ae2bf8
commit 4052fea817
1 changed files with 6 additions and 2 deletions
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8
Documentation/user-manual.txt
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@ -3548,8 +3548,12 @@ USB port.
Ensuring the user has write permission to the USB serial port: Ensuring the user has write permission to the USB serial port:
On Unix-like operating systems the USB ports can only be accessed by users who On Unix-like operating systems the USB ports can only be accessed by users who
are members are members special group that can be e.g.
of the +dialout+ group. If one is not root, one may not be a member of +dialout+ or +uucp+. This can be verified by listing the appropriate
device permissions e.g. by +ls -l /dev/ttyUSB0+. Note that the number in
the file name depends on how many USB devices you have connected, and
must be adjusted appropriately.
If one is not root, one may not be a member of
that group and that group and
won't be able to use the USB port. Let us assume one's username is 'johnB'. won't be able to use the USB port. Let us assume one's username is 'johnB'.