Added guide for server update

README.md

@@ -8,6 +8,9 @@ Never trust things you haven't done yourself.
 - [java](./java/README.md)
 - [spring](./java/spring/README.md)
 - [it-sec](./it-sec/README.md)
+- [git](./git/README.md)
+- [programming](./programming/README.md)
+- [server](./server/README.md)
 
 ## Collaborators
 

server/README.md

@@ -0,0 +1,9 @@
+# Server
+
+
+## Updates
+- [Update](./update.md)
+- [Automatic update](./atomatic_updates.md)
+
+## Resources
+- [Resources](./resources.md)

server/atomatic_updates.md

@@ -0,0 +1,17 @@
+# Automatic server updates with cron-apt
+
+## Install cron-apt
+
+    apt install cron-apt
+
+
+## Configuration
+
+All of the configuration files for cron-apt are located in the directory “/etc/cron-apt/” and the default crontab entry is located at “/etc/cron.d/cron-apt.” To change the frequency in which cron-apt checks for updates you will need to edit the crontab entry.  
+To configure cron-apt to send e-mail notifications, open the file “/etc/cron-apt/config” and adjust the following variables.
+
+    # Configuration for cron-apt. For further information about the possible
+    # configuration settings see /usr/share/doc/cron-apt/README.gz.
+
+    MAILON="always"
+    MAILTO="sysadmin@example.com"

server/update.md

@@ -0,0 +1,33 @@
+# Update Server
+
+Guide to update Debian-based server systems.
+
+## Update package lists
+
+    sudo apt update
+
+## Perform system upgrades
+
+    sudo apt upgrade
+    sudo apt dist-upgrade
+
+## Reboot server
+
+    sudo reboot
+
+
+
+
+
+
+
+
+
+
+
+## List all installed packages with versions
+
+    dpkg -l
+
+    dpkg -l | grep '^ii'
+