update ssh-keygen commands

Author: CrowdSalat

docs/git.md

@@ -17,7 +17,7 @@ git config --global alias.ci commit
 git config --global alias.st status
 
 ## generate ssh key
-ssh-keygen -t rsa -b 4096 -C "$MAIL_ADDRESS"
+ssh-keygen -t ed25519 -b 4096 -C "$MAIL_ADDRESS"
 
 # add ssh key agent for passwort prompt
 # see https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent#adding-your-ssh-key-to-the-ssh-agent
@@ -70,7 +70,7 @@ git config --global alias.ci commit
 git config --global alias.st status
 
 # ssh
-ssh-keygen -t rsa -b 4096 -C "$MAIL_ADDRESS"
+ssh-keygen -t ed25519 -b 4096 -C "$MAIL_ADDRESS"
 echo 'eval `ssh-agent -s`' >> ~/.bashrc && source ~/.bashrc
 ssh-add ~/.ssh/*_rsa
 
@@ -251,7 +251,7 @@ git tag -d 1.2.3
 ## ssh generate keys
 
 ```shell
-ssh-keygen -t rsa -b 4096
+ssh-keygen -t ed25519 -b 4096
 ```
 
 ## ssh remember passphrase

docs/jwt.md

@@ -0,0 +1,6 @@
+# JWT
+
+## 
+
+## with java
+

docs/linux (debian based)/copypasta_for_cli.md

@@ -104,7 +104,7 @@ git config --global alias.ci commit
 git config --global alias.st status
 
 # ssh keygen
-ssh-keygen -t rsa -b 4096
+ssh-keygen -t ed25519 -b 4096
 
 # remember ssh password
 ssh-add ~/.ssh/*_rsa

docs/linux (debian based)/linux_operations.md

@@ -132,7 +132,7 @@ ssh-copy-id -i ~/.ssh/mykey user@host
 e.g. for authentication on another machine where the public/private key pair is authorized
 
 ```shell
-ssh-keygen -t rsa -b 4096
+ssh-keygen -t ed25519 -b 4096
 ```
 
 ### Allow user to use sudo

docs/linux (debian based)/network_ssh.md

@@ -1,6 +1,24 @@
 # SSH
 
-## general overview
+
+## generate ssh key
+
+The -i flag for connection can be omitted if the standard file names id_ALGORITHM (private key) and id_ALGORITHM.pub (public key) are used.
+
+```shell
+# generate a private and public key pair in ~/.ssh/ folder
+ssh-keygen -t ed25519 -b 4096
+
+# in specifig folder
+ssh-keygen -t ed25519 -b 4096 -f /tmp/
+
+# needed permisions of files. Normally created automatically
+chmod 700 ~/.ssh
+chmod 644 ~/.ssh/id_ed25519.pub
+chmod 600 ~/.ssh/id_ed25519
+```
+
+## connect via ssh
 
 ```shell
 # add -v for verbose mode
@@ -48,20 +66,6 @@ if ! check_key_added; then
 fi
 ```
 
-## generate ssh key
-
-The -i flag can be omitted if the standard file names id_rsa (private key) and id_rsa.pub (public key) are used.
-
-```shell
-# generate a private and public key pair in ~/.ssh/ folder
-ssh-keygen
-
-# permisions of pub files
-chmod 700 ~/.ssh
-chmod 644 ~/.ssh/id_rsa.pub
-chmod 600 ~/.ssh/id_rsa
-```
-
 ## trust ssh key on remote server
 
 ```shell

docs/mac.md

@@ -124,7 +124,7 @@ git config --global user.email "$MAIL_ADDRESS"
 git config --global core.hooksPath .githooks
 
 ## generate ssh key
-ssh-keygen -t rsa -b 4096 -C "$MAIL_ADDRESS"
+ssh-keygen -t ed25519 -b 4096 -C "$MAIL_ADDRESS"
 
 # add ssh key agent for passwort prompt
 # see https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent#adding-your-ssh-key-to-the-ssh-agent

docs/spring/spring_security.md

@@ -1,5 +1,21 @@
 # Spring security
 
+## add custom authentication
+
+- implement AuthenticationProvider in you own class
+- and register it via
+    - 
+
+- nice example: https://github.com/dewantrie/springboot-custom-authentication-provider/blob/master/src/main/java/com/example/demo/config/SecurityConfig.java
+
+
+- Authentication
+- AuthenticationProvider
+- AuthenticationManager
+- UserDetailsService
+- UserDetails
+- SecurityFilterChain
+
 ## Configure exception for auth filter
 
 Disable for: