Provided Ubuntu Beta images do not automatically resize to grow the root (/) Linux partition. See below output below using fdisk and resize2fs commands.
In bold is where you have to type and press Enter. Italic text are notes/tips. If you have programs writing to disk while you do this, it may fail or corrupt filesystem. Works best on freshly image and after bootup. Annoying "unattended upgrades" daemon may be running immediately after first boot, use top command to see if any proccesses are active. I used sudo apt purge unattended-upgrades to uninstall as I rather have control and do updates myself with sudo apt update && sudo apt upgrade
If your user name is not in sudo group, you can use "su" command to change to root user default password is orangepi and proceed with resizing filesystem
You can add user to sudoers using usermod -aG sudo orangepi change "orangepi" to whatever username. This can only be done as root user.
# Start of filesystem resize task
miner@OrangePi:~$ sudo fdisk /dev/mmcblk0
[sudo] password for miner: (enter your user login password press Enter. user must be in sudo group see above.)
Welcome to fdisk (util-linux 2.27.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): d
Partition number (1,2, default 2): 2
Partition 2 has been deleted.
Command (m for help): n
Partition type
p primary (1 primary, 0 extended, 3 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (2-4, default 2): (press Enter)
First sector (2048-62521343, default 2048): 143360
Last sector, +sectors or +size{K,M,G,T,P} (143360-62521343, default 62521343): (press Enter)
Created a new partition 2 of type 'Linux' and of size 29.8 GiB.
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Re-reading the partition table failed.: Device or resource busy
The kernel still uses the old table. The new table will be used at the next reboot or after you run partprobe(8) or kpartx(8).
# Reboot to apply changes, ready for resize2fs
miner@OrangePi:~$ sudo reboot
# Now grow/resize root filesystem. No reboot required.
miner@OrangePi:~$ sudo resize2fs /dev/mmcblk0p2
[sudo] password for miner: (enter your user login password press Enter. user must be in sudo group see above.)
resize2fs 1.42.13 (17-May-2015)
Filesystem at /dev/mmcblk0p2 is mounted on /; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 2
The filesystem on /dev/mmcblk0p2 is now 7797248 (4k) blocks long.
Your filesystem should now use all available space on sd card. *A note on SD Cards with fake capacity.
This is rampant with online vendors, selling cheap micro SD Cards. You probably will not get a replacement.
If you ask for a replacement, they say a new genuine card is sent out but don't and wait out the buyer protection period, but you should try a refund.
In such cases the micro SD Card is only 8gb in capacity, or less. You can still use the SD Card though.
Use h2testw (for windows) to find out the true capacity and on the "Last block..." step during above resize operation enter a smaller value e.g. trying for approx 8gb resize...
Last sector, +sectors or +size{K,M,G,T,P} (143360-62521343, default 62521343): 15000000(and press Enter)
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