shorten&fix i2p installation with debian repository instructions

https://geti2p.net/en/download/debian

we see:

1. Ensure that apt-transport-https and curl are installed.

sudo apt-get update

sudo apt-get install apt-transport-https curl

2. Check which version of Debian you are using on this page at the Debian wiki and verify with /etc/debian_version on your system. Then, add lines like the following to /etc/apt/sources.list.d/i2p.list.

For Buster (stable):

deb https://deb.i2p2.de/ buster main
deb-src https://deb.i2p2.de/ buster main

For Stretch (oldstable):

deb https://deb.i2p2.de/ stretch main
deb-src https://deb.i2p2.de/ stretch main

For Jessie (oldoldstable):

deb https://deb.i2p2.de/ jessie main
deb-src https://deb.i2p2.de/ jessie main

For Wheezy (obsolete):

deb https://deb.i2p2.de/ wheezy main
deb-src https://deb.i2p2.de/ wheezy main

well this can be shortened to: (added lsb-release package to the needed pre-installed packages in number one,added [signed-by=/usr/share/keyrings/i2p-archive-keyring.gpg] to the repo which the new debian requirement )

1. Ensure that apt-transport-https and curl and lsb-release are installed.

sudo apt update && sudo apt install apt-transport-https curl lsb-release

2. Add I2P repository to the following path /etc/apt/sources.list.d/i2p.list.

echo "deb [signed-by=/usr/share/keyrings/i2p-archive-keyring.asc] https://deb.i2p2.de/ $(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/i2p.list

for the end user he need only deb repository which is the binary one, deb-src its useless for end user.

---

we see:

Add the key to APT's keyring:

sudo apt-key add i2p-debian-repo.key.asc

This is deprecated method according to the apt maintainer:

https://blog.jak-linux.org/2021/06/20/migrating-away-apt-key/

Required changes:

• Rename i2p keys from i2p-debian-repo.key.asc to i2p-archive-keyring.asc or whatever-archive-keyring.asc

• use cp or mv command for the keys to go to the right path (gonna use mv better)

• add signed-by=path to the repo (already added above)

So change the command to:

sudo mv ~/i2p-archive-keyring.asc /usr/share/keyrings

---

Fix typo:

Note: If you are running Debian Sid (testing), then you can install I2P directly from Debian's main repository:

sudo apt-get install i2p

Debian Sid (Unstable) not testing