linux/git: added credential storing and caching

wiki/git_(general).md

@@ -25,9 +25,23 @@ A distinction can be made between
 Web interfaces for git are quite useful for easily showing code to other people.
 Additionally it is easy to collaborate together.
 
-- [Gitea](gitea.md) is an open-source and selfhosted and can be dockerized.
-- [GitHub](https://github.com) is the go to system for many people. Not
-  selfhosted, owned by microsoft ([cli-tool](https://github.com/github/hub)).
+- [Gitea](gitea.md) is an open-source and selfhosted git instance which can be dockerized.
+- [GitHub](https://github.com) is a popular git server. 
+  It is not selfhosted and owned by microsoft ([cli-tool](https://github.com/github/hub)).
+- [GitLab](https://gitlab.com) is a self-hostable git instance which also has a default version
+  available via their website.
+
+#### Git Apps
+
+Depending on the [specific server](#server-with-web-interface) used there are many different apps
+that can be used.
+
+- For [GitHub](https://github.com) there is app with the same name for
+  [Android](/wiki/android.md) devices and iOS devices.
+- For [Gitea](/wiki/gitea.md) and Forgejo there is an app called [GitNex](https://gitnex.com) which
+  is available for [Android](/wiki/android.md) devices.
+- For [GitLab](https://gitlab.com) there is an app called [LabNex](https://labnex.app) which is
+  available for [Android](/wiki/android.md) devices.
 
 #### Server without graphical interface
 

wiki/linux/git_(package).md

@@ -93,7 +93,7 @@ A more or less complete overview of the options was performed in an
 Most [package managers](/wiki/linux/package_manager.md) package it in the package `git-delta`.
 
 Afterwards it needs to be enabled.
-To do this globally add the following lines to the configuration file of git, which can be found in 
+To do this globally add the following lines to the configuration file of git, which can be found in
 `~/.gitconfig`.
 Depending on the system settings and preferences the dark-mode (`dark`) and the side-by-side view
 (`side-by-side`) can and should be disabled.
@@ -141,3 +141,20 @@ git config --global color.diff.old        "red bold"
 git config --global color.diff.new        "green bold"
 git config --global color.diff.whitespace "red reverse"
 ```
+
+### Save HTTPS Credentials
+
+The credentials used for HTTPS authorization can be saved with the following command.
+
+```sh
+git config --global credential.helper store
+```
+
+They can also be cached with the following command.
+
+```sh
+git config --global credential.helper cache
+```
+
+Both of these commands work globally.
+For local storing or caching of credentials the commands have to be adapted.