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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 c7c9fb0bb0
commit 1f4d02a861
1 changed files with 6 additions and 2 deletions
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8
Documentation/user-manual.txt
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@ -3547,8 +3547,12 @@ USB 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
are members
of the +dialout+ group. If one is not root, one may not be a member of
are members special group that can be e.g.
+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
won't be able to use the USB port. Let us assume one's username is 'johnB'.