/dev/root is almost full

Hi there!

I've installed Kali Linux on a Raspberry Pi (used the right version for that). My SD-card is 16GB in size, though Kali only recognises 7GB. I noticed this after trying a dist-upgrade, it said /dev/root does not have enough space.

This is a print of the " df -h" command:

Code:

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Filesystem      Size  Used Avail Use% Mounted on
/dev/root      6.7G  6.5G    0 100% /
devtmpfs        460M    0  460M  0% /dev
tmpfs          464M    0  464M  0% /dev/shm
tmpfs          464M  13M  452M  3% /run
tmpfs          5.0M    0  5.0M  0% /run/lock
tmpfs          464M    0  464M  0% /sys/fs/cgroup
/dev/mmcblk0p1  61M  22M  40M  35% /boot
tmpfs            93M  4.0K  93M  1% /run/user/109
tmpfs            93M    0  93M  0% /run/user/0

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I noticed /dev/root is only 6.7G, my SD card is 16.
fdisk -l showed "/dev/mmcblk0" was also 6.7G. I expanded this to 15G.

The only issue is that /dev/root is still 6.7G and almost full.
Using this tutorial I tried to increase dev/root's size:

https://gist.github.com/vanhalt/baff...9caad40db73f50

The problem is that I cannot use the command "resize2fs /dev/mmcblk0p2".
I get the following notification:

Code:

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Filesystem at /dev/mmcblk0p2 is mounted on /; on-line resizing required
old_desc_blocks = 1, new_desc_blocks = 2
resize2fs: Permission denied to resize filesystem

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I've been at this for three hours, but I don't seem to be able to successfully increase the size of /dev/root. How can I fully utulize the 16GB on this SD-card?
Apparently I cannot resize it because I'm using that partition.

I'm connected through SSH so "gparted" does not work. I can only remotely access my PI with SSH (this is a school assignment). So far I've tried everything I can imagine, but I don't seem to succeed.

Can someone please help me?
Thanks in advance.

The resize needs to be done on a pc/Mac. A running system always has / mounted.

I used gparted to resize my 32gb sd card. Try to give that a shot.