Sources:
https://korben.info/f2fs-systeme-de-fichiers-pense-raspberry-pi-linstaller.html
http://www.instructables.com/id/Ultimate-Raspberry-Pi-Configuration-Guide/
Si vous utilisez Rapsbian sur votre Raspberry Pi, vous ne le savez peut être pas, mais il est possible de libérer 1 GB d'espace sur la carte SD assez facilement. En effet, LibreOffice, Wolfram, Minecraft et Sonic qui sont présents par défaut dans l'OS bouffent un max de place.
Il faut purger et désinstaller les applications comme ceci :
sudo apt-get autoremove –purge wolfram-engine minecraft-pi sonic-pi libreoffice*
Terminez ensuite avec un petit :
sudo apt-get clean
https://learn.adafruit.com/raspipe-a-raspberry-pi-pipeline-viewer-part-2/networked-pipes-with-netcat
Use dd, with the count option.
In your case you were using fdisk so I will take that approach. Your “sudo fdisk -l “produced:
Disk /dev/sda: 64.0 GB, 64023257088 bytes 255 heads, 63 sectors/track, 7783 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0000e4b5
Device Boot Start End Blocks Id System /dev/sda1 * 1 27 209920 83 Linux Partition 1 does not end on cylinder boundary. /dev/sda2 27 525 4000768 5 Extended Partition 2 does not end on cylinder boundary. /dev/sda5 27 353 2621440 83 Linux /dev/sda6 353 405 416768 83 Linux /dev/sda7 405 490 675840 83 Linux /dev/sda8 490 525 282624 83 Linux
The two things you should take note of are 1) the unit size, and 2) the “End” column. In your case you have cylinders that are equal to 8225280 Bytes. In the “End” column sda8 terminates at 525 (which is 525[units]*16065*512 = ~4.3GB)
dd can do a lot of things, such as starting after an offset, or stopping after a specific number of blocks. We will do the latter using the count option in dd. The command would appear as follows:
sudo dd if=/dev/sda of=/your_directory/image_name.iso bs=8225280 count=526
Where -bs is the block size (it is easiest to use the unit that fdisk uses, but any unit will do so long as the count option is declared in these units), and count is the number of units we want to copy (note that we increment the count by 1 to capture the last block).