I faced the same problem as yours.
But I take a further action "dpkg -P package name". After this command has been run, it shows "uninstalled" in the status file. It seems that apt-get does not update the installation file status.
I uninstall apps with apt-get remove usually, only sometimes with dpkg -r. So when I generate a size-sorted list of what's installed with dpkg, the things I removed with apt still show up. And I can no longer remove them with dpkg once they've been unistalled.
How can I get dpkg to know which apps I've removed with apt-get?
I faced the same problem as yours.
But I take a further action "dpkg -P package name". After this command has been run, it shows "uninstalled" in the status file. It seems that apt-get does not update the installation file status.
it sure does .. but if you look carefully you'll se ii at some and rc at others. If you want to get completly rid of file you need to --purge it
cleaning
for i in $(dpkg -l | grep ^rc | cut -d " " -f 3); do dpkg --purge $i; done
for uninstall packages use apt-get remove --purge package-name,no trash after...
Dell Poweredge R630 2x Xeon E5-2680 v4 2.4ghz 28-Cores / 128gb / H330 / 2x 1TB
$279.99
DELL PowerEdge R630 8SFF Server 2x E5-2690v4 2.6GHz =28 Cores 128GB H730 4xRJ45
$428.00
1U Supermicro Server 10 Bay 2x Intel Xeon 3.3Ghz 8C 128GB RAM 480GB SSD 2x 10GBE
$273.00
Colfax CX75432 4U Server 2x Xeon E5-2660 v3 NO RAM NO HDD NO GPU
$556.00
Lenovo RD340 Server 1x Xeon E5-2407v2 2.4Ghz * 16GB Ram * 1x 2TB HDD * No OS
$250.00
Dell PowerEdge R420 Dual Intel Xeon E5-2440 v2 @1.90GHz 32GB RAM No HDD H710
$74.50
Dell PowerEdge R730XD Server 2x Xeon E5-2650v4 2.2GHz 64GB RAM No HDD
$250.00
Dell PowerEdge R620 Server 2x E5-2660 v2 2.2GHz 20 Cores 256GB RAM 1x 480GB SSD
$139.99
Dell R730xd 26 Port SFF 2x E5-2697v4 36-Cores H730 128GB Server 2x SFP 10G ENT
$490.00
Dell Poweredge R730xd 3.5 2x E5-2690 v3 2.6ghz 64gb H730 14x Trays 2x 1100w
$489.99