Make your pi images smaller!

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Carl Jensen 8388774c3e New indents broke rc.local md5sum, startup script The indentation was introduced in `cad2e0e11a`, not when the safety hash check was added in `2c6f069c2f`, my first guess. The indentations makes the rc.local begin with spaces instead of `#!/bin/bash` and will not run. But it gets better. The md5 safety check is based on rc.local without indents, so after the added indentations the if-block will never be skipped. If the script is run a second time, the original rc.local backed up in rc.local.bak will be overwritten, and on boot result in a never ending loop, trying to expand the filesystem each time. A user could run the pishrink.sh a second time on a disk image, e.g. after making more edits.	2016-08-18 03:01:14 +02:00
LICENSE	Initial Commit	2016-04-11 23:05:00 -04:00
README.md	Add getops to script to provide user the ability to skip autoexpanding process of the script	2016-07-09 20:45:54 -07:00
pishrink.sh	New indents broke rc.local md5sum, startup script	2016-08-18 03:01:14 +02:00

Carl Jensen 8388774c3e New indents broke rc.local md5sum, startup script

The indentation was introduced in cad2e0e11a, not when the safety hash check was added in 2c6f069c2f, my first guess.
The indentations makes the rc.local begin with spaces instead of `#!/bin/bash` and will not run. But it gets better.
The md5 safety check is based on rc.local without indents, so after the added indentations the if-block will never be skipped. If the script is run a second time, the original rc.local backed up in rc.local.bak will be overwritten, and on boot result in a never ending loop, trying to expand the filesystem each time. A user could run the pishrink.sh a second time on a disk image, e.g. after making more edits.

2016-08-18 03:01:14 +02:00

LICENSE Initial Commit 2016-04-11 23:05:00 -04:00

README.md Add getops to script to provide user the ability to skip autoexpanding process of the script 2016-07-09 20:45:54 -07:00

pishrink.sh New indents broke rc.local md5sum, startup script 2016-08-18 03:01:14 +02:00

README.md

PiShrink

PiShrink is a bash script that automatically shrink a pi image that will then resize to the max size of the SD card on boot. This will make putting the image back onto the SD card faster and the shrunk images will compress better.

Usage: ./pishrink [-s] imagefile.img [newimagefile.img]

If the -s option is given the script will skip the autoexpanding part of the process. 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.

Example

[user@localhost PiShrink]$ sudo ./shrink.sh pi.img
e2fsck 1.42.9 (28-Dec-2013)
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
/dev/loop1: 88262/1929536 files (0.2% non-contiguous), 842728/7717632 blocks
resize2fs 1.42.9 (28-Dec-2013)
resize2fs 1.42.9 (28-Dec-2013)
Resizing the filesystem on /dev/loop1 to 773603 (4k) blocks.
Begin pass 2 (max = 100387)
Relocating blocks             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 3 (max = 236)
Scanning inode table          XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Begin pass 4 (max = 7348)
Updating inode references     XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
The filesystem on /dev/loop1 is now 773603 blocks long.

Shrunk pi.img from 30G to 3.1G

Contributing

If you find a bug please create an issue for it. If you would like a new feature added, you can create an issue for it but I can't promise that I will get to it.

Pull requests for new features and bug fixes are more than welcome!