Add Phase 2 files

Phase 2/06 Other Domains.md

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+# Domain: General Skills
+
+## Magikarp Ground Mission
+
+We press the `START INSTANCE` button and are given an ssh command to enter
+
+```
+ssh ctf-player@venus.picoctf.net -p 52353
+```
+
+It's given that we need to login as `ctf-player` with the password `a13b7f9d`. Once we do, we're greeted to this
+
+```
+ctf-player@venus.picoctf.net's password:
+Welcome to Ubuntu 18.04.5 LTS (GNU/Linux 5.4.0-1041-aws x86_64)
+
+ * Documentation:  https://help.ubuntu.com
+ * Management:     https://landscape.canonical.com
+ * Support:        https://ubuntu.com/advantage
+This system has been minimized by removing packages and content that are
+not required on a system that users do not log into.
+
+To restore this content, you can run the 'unminimize' command.
+
+The programs included with the Ubuntu system are free software;
+the exact distribution terms for each program are described in the
+individual files in /usr/share/doc/*/copyright.
+
+Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
+applicable law.
+
+ctf-player@pico-chall$
+```
+
+Running `ls`, we get
+
+```
+ctf-player@pico-chall$ ls
+1of3.flag.txt  instructions-to-2of3.txt
+```
+
+Using `cat`, we get the first part of the flag and instructions to the next part
+
+```
+ctf-player@pico-chall$ cat *.txt
+picoCTF{xxsh_
+Next, go to the root of all things, more succinctly `/`
+```
+
+So we go to the root folder using `cd`
+
+```
+ctf-player@pico-chall$ cd /
+ctf-player@pico-chall$ ls
+2of3.flag.txt  bin  boot  dev  etc  home  instructions-to-3of3.txt  lib  lib64  media  mnt  opt  proc  root  run  sbin  srv  sys  tmp  usr  var
+```
+
+We see two `.txt` files. Running `cat` on them, we get the second part of the flag
+
+```
+ctf-player@pico-chall$ cat *.txt
+0ut_0f_\/\/4t3r_
+Lastly, ctf-player, go home... more succinctly `~`
+```
+
+So we go to the home directory. Running `cd` with no arguments takes us there
+
+```
+ctf-player@pico-chall$ cd
+ctf-player@pico-chall$ ls
+3of3.flag.txt  drop-in
+```
+
+Running `cat` for the third time, we get
+
+```
+ctf-player@pico-chall$ cat *.txt
+71be5264}
+```
+
+As the third part of the flag.
+
+Combining all the parts, we get the flag as `picoCTF{xxsh_` + `0ut_0f_\/\/4t3r_` + `71be5264}` = `picoCTF{xxsh_0ut_0f_\/\/4t3r_71be5264}`
+
+**Flag:** `picoCTF{xxsh_0ut_0f_\/\/4t3r_71be5264}`