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Update usage info

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Drew Bonasera 2020-06-17 15:21:29 -04:00
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@ -22,7 +22,9 @@ Usage: $0 [-adhrspvzZ] imagefile.img [newimagefile.img]
If you specify the `newimagefile.img` parameter, the script will make a copy of `imagefile.img` and work off that. You will need enough space to make a full copy of the image to use that option. If you specify the `newimagefile.img` parameter, the script will make a copy of `imagefile.img` and work off that. You will need enough space to make a full copy of the image to use that option.
* `-r` will attempt to repair the filesystem if regular repairs fail * `-s` prevents automatic filesystem expantion on the images next boot
* `-v` enables more verbose output
* `-r` will attempt to repair the filesystem using aditional options if the normal repair fails
* `-z` will compress the image after shrinking using gzip. `.gz` extension will be added to the filename. * `-z` will compress the image after shrinking using gzip. `.gz` extension will be added to the filename.
* `-Z` will compress the image after shrinking using xz. `.xz` extension will be added to the filename. * `-Z` will compress the image after shrinking using xz. `.xz` extension will be added to the filename.
* `-a` will use option -f9 for pigz and option -T0 for xz and compress in parallel. * `-a` will use option -f9 for pigz and option -T0 for xz and compress in parallel.