make more commits :-)

projects/sbx/student/student_linux_tasks.md

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+
+## Tasks
+
+Separate by different levels of difficulty. In the beginning only easier concepts should be presented. 
+Write guide which can be followed in order to learn and see concepts such as an manual to install a nextcloud instance. 
+In the process the student would learn how a mariadb database is setup. Just following some simple commands.
+
+### Level 0
+
+- [ ] base commands - 20 most useful commands: cd, ls, mkdir, mv, rm , cp, touch, find, grep, cat, ssh
+- [x] ssh key-exchange authentication
+- [x] ssh hardening - not root login, no password hardening
+- [x] nginx
+- [ ] user and group management
+
+### Level 1
+
+- [x] fail2ban-server
+
+### Level 2
+
+- [ ] git local and remote repo as github and internal gitea
+
+### Level 3
+
+- [ ] git server
+- [ ] setup mysql/mariadb database
+- [ ] nextcloud setup
+
+### Level 4
+
+- [ ] nmap 
+- [ ] ipcalc
+- [ ] ufw
+
+### Level 5 
+
+- [ ] simple mail server Ports: 25 (smtp), 587 (smpts), 143 (imap)
+- [ ] tcpdump -> catch clear text passwd with tcpdump
+- [ ] pki for mutual tls trust
+- [ ] build each their own firewall/router with openbsd
+- [ ] build together an firewall which will be the sbx_lab firewall
+