Why can't I remove packages from OpenWRT?

Question

linux

Initially, I wanted to install motion and set up a Telegram bot that will send pictures when there is movement in the camera.
Put, poklatsal. Delete - does not want to.
I think okay, there is still room, I’ll upload the goit config from github, but I refused to download it through git clone, I had to remove git (opkg remove git) and install a new git (opkg install git-http). This is where the place ends. I think it needs to be cleaned. And actually here:

[email protected]:~# opkg remove git
No packages removed.
[email protected]:~# opkg remove git-http
No packages removed.
[email protected]:~# opkg remove motion
No packages removed.
[email protected]:~# opkg remove mjpg_streamer
No packages removed.

[email protected]:~# df -h
Filesystem                Size      Used Available Use% Mounted on
rootfs                    4.6M      4.4M    148.0K  97% /
/dev/root                 2.3M      2.3M         0 100% /rom
tmpfs                    14.0M    988.0K     13.1M   7% /tmp
/dev/mtdblock3            4.6M      4.4M    148.0K  97% /overlay
overlayfs:/overlay        4.6M      4.4M    148.0K  97% /
tmpfs                   512.0K         0    512.0K   0% /dev

If I go to /overlay/upper/usr/bin : but the commands above (opkg remove) never answered me with the result of what was removed.

[email protected]:/overlay/upper/usr/bin# ls
git                 git-shell           git-upload-pack     nano
git-receive-pack    git-upload-archive  mc

I noticed free rootfs 2.3M , now they are not there, and there seem to be no packages, but the free space has disappeared somewhere.

Answer 1

do opkg list-installedto see what is installed
In general, yes, there may be tails from installed packages. It is better to backup the firmware and restore from naked, or even better, connect a USB flash drive and install all additional packages on it via extroot.