Hello,
Do you have a step by step procedure to create an image of my sd-card so that someone else can burn it on another sd-card and will not have to install and configure all that I already done ?
My problem is that my SD-card is 64GB so if I create a image from W32DiskImager the image is very big size ! Even if I use only 30GB…
Thanks a lot
My notes on doing this. Using a Linux machine!
This is not a tutorial / howto this is just my notes. I don’t have the 2hrs to write up a tutorial at them moment.
Using gparted shrink the main partishion down. Leave some space 1MB at the end for extra data.
find the disk to copy
$ sudo fdisk -l
see the output similar to the following:
Disk model: Card R/W -SD/MS
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 91FC289A-1E03-495A-9DAD-732401089949
Device Start End Sectors Size Type
/dev/sde1 28672 50831359 50802688 24.2G Linux filesystem
/dev/sde2 2048 2303 256 128K Linux filesystem
/dev/sde3 4096 4991 896 448K Linux filesystem
/dev/sde4 6144 7295 1152 576K Linux filesystem
/dev/sde5 8192 8319 128 64K Linux filesystem
/dev/sde6 10240 10623 384 192K Linux filesystem
/dev/sde7 12288 13055 768 384K Linux filesystem
/dev/sde8 14336 14463 128 64K Linux filesystem
/dev/sde9 16384 17279 896 448K Linux filesystem
/dev/sde10 18432 19327 896 448K Linux filesystem
/dev/sde11 20480 22015 1536 768K Linux filesystem
/dev/sde12 22528 22655 128 64K Linux filesystem
/dev/sde13 24576 24959 384 192K Linux filesystem
/dev/sde14 26624 26879 256 128K Linux filesystem
Partition table entries are not in disk order.
Note two things in the output:
The Last partition ends on block 50831359 (shown under End)
The block-size is 512 bytes (shown as sectors of 1 * 512)
We will use these numbers in the rest of the example.
count will = 50831359 + 1
sudo dd if=/dev/sde bs=512 count=50831360 of=~/yournamed.img status=progress
remember when you flash it to the new SD card you need to use gparted to increse the partishion and accept the fix presented by gparted for table issue.
What this does is create a image of only the current size of the installed data on your current SD card.
If there is demand and a bunch of users here want me to create a tutorial on how todo this with photos for the steps let me know.
Before you begin, you have already done these things.
I create my environment on a 32GB sd card to speed up my work.
Start here.
If your JetPack version is not 4.6.x, select the collect branch.
git clone https://github.com/NVIDIA-AI-IOT/jetcard
cd jetcard
git checkout 852475be56ab220283b273f7c320e74b764a3b43
sudo cp scripts/archive/nvresizefs.sh /etc/systemd/
sudo cp scripts/archive/system/nvresizefs.service /etc/systemd/system/
sudo ln -s /etc/systemd/system/nvresizefs.service /etc/systemd/system/multi-user.target.wants/nvresizefs.service
ls -l /etc/systemd/nvresizefs.sh
ls -l /etc/systemd/system/nvresizefs.service
ls -l /etc/systemd/system/multi-user.target.wants/nvresizefs.service
cd ..
rm -rf jetcard
sudo apt-get autoremove -y
sudo apt-get clean
sudo rm -rf /var/lib/apt/lists/*
rm -rf ~/.ipynb_checkpoints/
rm -rf ~/.ipython/
rm -rf ~/.python_history
For example, you need to use pythoch pre-trained model in a jupyter notebook.
In such cases, instead of running jupyter notebook, run the python command.
In this case, no cache will be created.
Example of downloading a pre-trained model of pytorch.
python3 -c "import torchvision; \
model = torchvision.models.alexnet(pretrained=True); \
model = torchvision.models.resnet18(pretrained=True)"
sudo sed -i 's/enabled=1/enabled=0/g' /etc/default/apport
sudo systemctl set-default multi-user.target
Enable GUI (if you want to rollback)
sudo systemctl set-default graphical.target
history -c
HISTIGNORE=*;history -d `history|awk '{a=$1;}END{print a;}'`
rm -rf ~/.bash_history
sudo su
history -c
HISTIGNORE=*;history -d `history|awk '{a=$1;}END{print a;}'`
rm -rf ~/.bash_history
For Jetson Nano 4GB/NX JetPack 4.6.x.
rm /var/log/alternatives.log*
rm /var/log/auth.log*
rm /var/log/btmp*
rm /var/log/dpkg.log*
rm /var/log/kern.log*
rm /var/log/lastlog*
rm /var/log/oem-config.log*
rm /var/log/syslog*
rm /var/log/tallylog*
rm /var/log/wtmp*
rm /var/log/Xorg.0.log*
touch /var/log/alternatives.log
touch /var/log/auth.log
touch /var/log/btmp
touch /var/log/dpkg.log
touch /var/log/kern.log
touch /var/log/lastlog
touch /var/log/oem-config.log
touch /var/log/syslog
touch /var/log/tallylog
touch /var/log/wtmp
touch /var/log/Xorg.0.log
chown syslog:adm /var/log/auth.log
chown root:utmp /var/log/btmp
chown syslog:adm /var/log/kern.log
chown root:utmp /var/log/lastlog
chown syslog:adm /var/log/syslog
chown root:utmp /var/log/wtmp
chown root:root /var/log/Xorg.0.log
for CLEAN in $(find /var/log/ -type f)
do
cp /dev/null $CLEAN
done
shutdown -h now
If you want to disable bug reports or disable the GUI, please do so before shutdown.
I use SONY MRW-S1 SD CARD READER.
sudo su
fdisk -l
umount /dev/sda1
dd bs=4M if=/dev/sda of=jetbot-nano-4gb-jp461-2022-04-04.img status=progress
This process sometimes fails in the process.
This is one of the reasons I use a 32GB sd card.
A smaller capacity sd card is less likely to fail.
sudo su
modprobe loop
export LOOP=`losetup -f`
losetup $LOOP jetbot-nano-4gb-jp461-2022-04-04.img
partprobe $LOOP
echo $LOOP
gparted $LOOP
Edit partition.
Good reference: partitioning - "Re-size" the .img for smaller SD-card. How to SHRINK a bootable SD card image - Ask Ubuntu
After partition have been changed, exit gparted.
Delete loop.
losetup -d $LOOP
unset LOOP
The file size has not yet been reduced.
ls -l jetbot-nano-4gb-jp461-2022-04-04.img
-rw-r--r-- 1 root root 32010928128 Apr 13 20:14 jetbot-nano-4gb-jp461-2022-04-04.img
Check the image information.
fdisk -l jetbot-nano-4gb-jp461-2022-04-04.img
Disk jetbot-nano-4gb-jp461-2022-04-04.img: 29.83 GiB, 32010928128 bytes, 62521344 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 91FC289A-1E03-495A-9DAD-732401089949
Device Start End Sectors Size Type
jetbot-nano-4gb-jp461-2022-04-04.img1 28672 60024831 59996160 28.6G Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img2 2048 2303 256 128K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img3 4096 4991 896 448K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img4 6144 7295 1152 576K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img5 8192 8319 128 64K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img6 10240 10623 384 192K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img7 12288 13055 768 384K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img8 14336 14463 128 64K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img9 16384 17279 896 448K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img10 18432 19327 896 448K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img11 20480 22015 1536 768K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img12 22528 22655 128 64K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img13 24576 24959 384 192K Linux filesystem
jetbot-nano-4gb-jp461-2022-04-04.img14 26624 26879 256 128K Linux filesystem
Partition table entries are not in disk order.
See the first line.
Device Start End Sectors Size Type
jetbot-nano-4gb-jp461-2022-04-04.img1 28672 60024831 59996160 28.6G Linux filesystem
Reduce file size.
truncate --size=$[(60024831+1)*512] jetbot-nano-4gb-jp461-2022-04-04.img
Now the file size is smaller.
(This image has a large SWAP size. So it was able to reduce only 1.3 GB.)
ls -l jetbot-nano-4gb-jp461-2022-04-04.img
-rw-r--r-- 1 root root 30732713984 Apr 13 20:17 jetbot-nano-4gb-jp461-2022-04-04.img
There may be a smarter way to do the part of deleting logs.
This is how I do it when I create a sd card image.
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