ADB version of these terminal emulator instructions?

Question

I have the "Insufficient storage" bug on my Moto G X1032. This answer fixes it with the terminal emulator app, which i can't install. They recommend performing the following commands in adb if that's the case. These commands aren't working, so i assume ADB uses different equivalents. Hopefully you can translate:

"After browsing around, I found out that the cache folder (that I assume used by the market) is using small partition (around 20mb in my case). So to solve this we need to change it to bigger partition.

You gonna need Android Terminal Simulator or equivalent terminal app. This will also require your Android rooted."

su                                    // Root permission request will be shown: you need to approve it. 
cd /
umount /cache
mount -o rw,remount -t rootfs rootfs  // To set the folder access to rw – read and write
rmdir /cache                          // Delete cache folder. I'm personally using root explorer to do point 5-6.
mkdir /sdcard/cache 
ln -s /sdcard/cache /cache            // To link cache folder to /sdcard/cache – which should have bigger partition size

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