Transfer package list from one linux system to new install

 

Open the terminal on your old machine and enter this command. It creates a list of all packages you manually installed.

apt-mark showmanual > packages.txt

Transfer the packages.txt file to the PC with the new installation. Open a terminal in the that navigate to the folder where you kept the packages.txt file. Then run this command.

sudo xargs apt install -y

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Repositories for Raspbian (Debian Stretch) no longer supported

This is a note on the Raspbian release, but probably will need a similar action for any other ones so expired support

/etc/apt/sources.list
comment out "raspbian" entry and add "legacy" one.

-- old

deb http://raspbian.raspberrypi.org/raspbian/ stretch main contrib non-free rpi

-- should be

deb http://legacy.raspbian.org/raspbian/ stretch main contrib non-free rpi

need to do apt-update

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how to create a local repository for Debian. Also redirect from local to remote repo

 

https://www.linuxquestions.org/questions/debian-26/how-to-create-local-repository-with-debian-9-a-4175608798/ 

 

https://askubuntu.com/questions/42441/how-do-remove-the-cd-dvd-install-as-a-source-for-apt-get-packages-when-install 

 

removing the dvd / cdrom entry (commenting) in /etc/apt/sources.list seems to remove the prompt

to insert media

 

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rdesktop rdp client

 

for some reason the remmina rdp isn't working with linux clients (Raspbian version, latest as of March 2021).

There's a command line invoked utility, rdesktop that works well.

rdesktop -u <user id> <ip or dns name>

the -f will launch at the full screen of the local client screen.  <ctl><alt><enter> exits full screen so you can exit rdesktop.  Works fine with windows and linux systems rdp servers.

sudo apt install -y rdesktop

sudo dnf install rdesktop  <centos 8 and RHEL 8>

sudo yum install rdesktop <fedora, other RHEL>

https://www.tecmint.com/rdesktop-connect-windows-desktop-from-linux/

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show repositories on Ubuntu (and others)

 

 

debian

grep ^[^#] /etc/apt/sources.list /etc/apt/sources.list.d/*

 

https://www.networkworld.com/article/3305810/how-to-list-repositories-on-linux.html

 

Fix GPG signatures

sudo apt-key list  | grep "expired: " | sed -ne 's|pub .*/\([^ ]*\) .*|\1|gp' | xargs -n1 sudo apt-key adv --keyserver keys.gnupg.net --recv-keys

 

https://askubuntu.com/questions/650032/gpg-errorthe-following-signatures-were-invalid-keyexpired 

 

general apt structure is in:

/etc/apt

 

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