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README.md: add more docs
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README.md
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README.md
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@ -75,11 +75,11 @@ reproducible** if the `$SOURCE_DATE_EPOCH` environment variable is set.
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The author believes, that it should not be necessary to have superuser
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privileges to create a file (the chroot tarball) in one's home directory.
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Thus, mmdebstrap provides multiple options to create a chroot tarball with the
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right permissions **without superuser privileges**. Depending on what is
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available, it uses either Linux user namespaces, fakechroot or proot.
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Debootstrap supports fakechroot but will not create a tarball with the right
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permissions by itself. Support for Linux user namespaces and proot is missing
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(see bugs #829134 and #698347, respectively).
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right permissions **without superuser privileges**. This avoids a whole class
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of bugs like #921815. Depending on what is available, it uses either Linux user
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namespaces, fakechroot or proot. Debootstrap supports fakechroot but will not
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create a tarball with the right permissions by itself. Support for Linux user
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namespaces and proot is missing (see bugs #829134 and #698347, respectively).
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When creating a chroot tarball with debootstrap, the temporary chroot directory
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cannot be on a filesystem that has been mounted with nodev. In unprivileged
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@ -93,7 +93,10 @@ Limitations in comparison to debootstrap
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----------------------------------------
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Debootstrap supports creating a Debian chroot on non-Debian systems but
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mmdebstrap requires apt and is thus limited to Debian and derivatives.
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mmdebstrap requires apt and is thus limited to Debian and derivatives. This
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means that mmdebstrap can never fully replace debootstrap and debootstrap will
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continue to be relevant in situations where you want to create a Debian chroot
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from a platform without apt and dpkg.
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There is no `SCRIPT` argument.
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