POSIX Script for installing APT keys

General help

This script will help with installing PGP keys for APT repositories.

This script supports up to 2 arguments:

• 1st argument is input file. This can be either:
  • An URL - key will be downloaded into current path (using wget or curl)
  • A filename - reads an existing key in current path
  • A path and a filename - reads an existing key in given path
• 2nd argument is key output path and output name. This can be either:
  • Only filename - output path is set in config, saved as given filename
  • A path and a filename - output path is given here, saved as given filename
  • Only a path (end with /) - output path is given here, filename is taken from existing key
  • Empty - output path is set in config, filename is taken from existing key

This script has a config file /usr/local/etc/add-apt-key.conf, where the following variables can be set:

• keypath : path to store converted key - default is /etc/apt/keyrings
• verbosity : if set to Yes - displays extra output
• removetmp : if set to Yes - remove input (non-converted) file

Example 1: (PWD=/root)

sudo add-apt-key https://mariadb.org/mariadb_release_signing_key.asc /usr/share/keyrings/

Will download key in /root, convert it and store as /usr/share/keyrings/mariadb_release_signing_key.gpg

Example 2: (PWD=/home/user)

sudo add-apt-key /root/mariadb_release_signing_key.asc /usr/share/keyrings/mariadbkey

Will use existing key in /root, convert it and store as /usr/share/keyrings/mariadbkey.gpg

Example 3: (PWD=/home/user)

sudo add-apt-key mariadb_release_signing_key.asc mariadbkey

Will use existing key in /home/user, convert it and store as /etc/apt/keyrings/mariadbkey.gpg

After installing the PGP key, it is also possible to add the key and repository to /etc/apt/sources.list

• The choice to add this will be presented in the script as the first input option
• If Yes is chosen, the repository string must be pasted as the second input option

This completes the key installation by adding the corresponding repository line to /etc/apt/sources.list

Installation

Install by running the following commands:

sudo curl -L https://raw.githubusercontent.com/ameinild/add-apt-key/master/add-apt-key -o /usr/local/bin/add-apt-key
sudo curl -L https://raw.githubusercontent.com/ameinild/add-apt-key/master/add-apt-key.conf -o /usr/local/etc/add-apt-key.conf
sudo chmod a+rx /usr/local/bin/add-apt-key