The following error is displayed when updating via apt-get :
Err:3 http://http.kali.org/kali kali-rolling/main amd64 gzip amd64 1.8-1+b1 File has unexpected size (225568 != 115516). Mirror sync in progress?
The apt update via http should be changed to https :
echo "deb https://http.kali.org/kali kali-rolling main non-free contrib" > /etc/apt/sources.list apt clean apt update apt upgrade
Alternatively, the Nano_(Texteditor) can be used, but care must be taken to ensure that the http source is commented out.
The sources.list should then look like this:
# See https://www.kali.org/docs/general-use/kali-linux-sources-list-repositories/ #deb http://http.kali.org/kali kali-rolling main contrib non-free # Additional line for source packages # deb-src http://http.kali.org/kali kali-rolling main contrib non-free deb https://http.kali.org/kali kali-rolling main non-free contrib