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man: document that user namespacing complicates file copies

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Lennart Poettering 2017-02-16 14:38:05 +01:00
parent 7f43928ba6
commit aa10469e17
1 changed files with 6 additions and 1 deletions
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7
man/systemd-nspawn.xml
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@ -474,7 +474,12 @@
<para>Note that the picked UID/GID range is not written to <filename>/etc/passwd</filename> or
<filename>/etc/group</filename>. In fact, the allocation of the range is not stored persistently anywhere,
except in the file ownership of the files and directories of the container.</para></listitem>
except in the file ownership of the files and directories of the container.</para>
<para>Note that when user namespacing is used file ownership on disk reflects this, and all of the container's
files and directories are owned by the container's effective user and group IDs. This means that copying files
from and to the container image requires correction of the numeric UID/GID values, according to the UID/GID
shift applied.</para></listitem>
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