bad.horse bad.horse

data/base_16.md

@@ -3,6 +3,24 @@ title: "Base 16"
 tags: [ "data" ]
 ---
 
-```bash
+Base 16 numbers often use `0x` at the start, so '10' just means '10', but `0x10` means '10 in base 16' which means '16'.
+
+For small numbers, use `printf`.
+
+```sh
 printf "%x" $NUMBER
 ```
+
+For any number, use `bc`.
+
+
+```sh
+fortune | md5sum  | cut -d' ' -f1 | tr [:lower:] [:upper:] | bc
+```
+
+- Inputting base 16 uses `ibase=16`.
+- Outputting base 10 uses `ibase=10`
+
+```sh
+echo 'ibase=16;' $(echo cbb478ac825f0dce7671254be035d0bc | tr [:lower:] [:upper:]) | bc
+```

networking/bad_horse.md

@@ -0,0 +1,20 @@
+---
+title: "Mapping the Net"
+tags: [ "networking", "graph", "fun" ]
+---
+
+Find the path to a domain:
+
+```sh
+domain=bad.horse
+max_hops=50
+
+tracepath -m $maximum_hops $domain
+```
+
+If you're on Debian, you can use `graph-easy` and `dothost` to make an instant diagram:
+
+```sh
+domain=dice.camp
+dothost $domain | graph-easy --boxart
+```

system/Makefiles.md

@@ -23,7 +23,8 @@ Using four spaces will not work!
 
 ## Dependency Files
 
-Now we've made a `README.md` file, we can show how a makefile looks in the README:
+Now we've made a `README.md` file, we can show how a makefile looks in the README file.
+Add these lines to the `Makefile`:
 
 ```make
 README.md: Makefile
@@ -44,7 +45,7 @@ Note the order:
 
 Notice that the file above can print into the README by using `echo "" >> $@`.
 The `$@` stands for 'the file which we want', and `$<` stands for 'the first dependency file'.
-The `make` program starts by replacing those variables, and the result it:
+The `make` program starts by replacing those variables, so when you run `make`, the program looks like this:
 
 ```make
 README.md: Makefile
@@ -54,7 +55,6 @@ README.md: Makefile
 	cat Makefile >> README.md
 	echo '```' >> README.md
 
-
 ```
 
 |  Sigil  | Meaning                                |
@@ -71,7 +71,6 @@ README.md: Makefile
 
 You can assign a variable normally, but must refer to it in brackets.
 
-
 ```make
 storage_directory = backups
 
@@ -182,4 +181,3 @@ In this case, the makefile can see that `backup` depends on the current backup f
 - [File patterns](Makefiles/patterns.md)
 - [Makefile graphs](Makefiles/graph-easy.md)
 - [In-build help](Makefiles/help.md)
-- [Makefile graphs](Makefiles/graph-easy.md)