add new blog entry about encryption

blog/2024-10-10-how-to-enable-encrypted-swap-in-alpine-linux.mdwn

@@ -0,0 +1,59 @@
+[[!meta title="How to enable encrypted swap in Alpine Linux"]]
+
+## TL;DR
+
+There is no TL;DR, because it is so easy that any summary would be too
+long.
+
+The steps are so simple:
+
+### Edit /etc/conf.d/dmcrypt
+
+Checkout the samples and enable swap like this:
+
+    swap=crypt-swap
+    source='/dev/nvme0nXXX'
+
+(obviously set the correct *source* device)
+
+### Start dmcrypt
+
+Run
+
+    /etc/init.d/dmcrypt start
+
+### Enable swap
+
+    swapon /dev/mapper/crypt-swap
+
+
+### Make it persistent
+
+    # Enable automatic start
+    rc-update add dmcrypt
+
+    # Enable automatic swapon
+    echo /dev/mapper/crypt-swap swap swap defaults 0 0 >> /etc/fstab
+
+## Background
+
+Until today I did not know (or care) how to enable swap in Alpine
+Linux. As firefox (sic!) is killing my system more often these days, I
+decided to enable swap using a partition I left for it some years ago.
+
+As I did not know how it works, I grep'ed for crypt through
+/etc/init.d, found the dmcrypt init script quickly which references
+/etc/conf.d/dmcrypt. I opened the config file and within minutes my
+encrypted swap was up.
+
+Note that above instructions will reset/re-encrypt swap on every boot
+and thus no suspend to disk works with it. That's fine with me, as
+that is not a feature I am ever going to use.
+
+The point I need to make is that at the moment there is no single
+other Linux distribution out there that I know off that is allowing me
+to make changes, even those which I don't know yet how to, that easily
+and I want to say many thanks for keeping Alpine Linux as simple as
+other Linux distributions used to be in the 90's.
+
+[[!tag alpinelinux security]]

ikiwiki.setup

@@ -16,9 +16,9 @@ use IkiWiki::Setup::Standard {
 	# users who are banned from the wiki
 	banned_users => [],
 	# where the source of the wiki is located
-	srcdir => '/home/nico/nico.schottelius.org',
+	srcdir => '/home/nico/vcs/www.nico.schottelius.org',
 	# where to build the wiki
-	destdir => '/home/services/www/nico/www.nico.schottelius.org/www',
+	destdir => '/tmp/www.nico.schottelius.org',
 	# base url to the wiki
 	url => 'https://www.nico.schottelius.org/',
 	# url to the ikiwiki.cgi
@@ -284,9 +284,9 @@ use IkiWiki::Setup::Standard {
 	# extra template directories to add
 	#add_templates => [qw{/home/users/nico/.ikiwiki/templates}],
 
-   git_wrapper => '/home/services/git/nico.schottelius.org/hooks/post-update',
+   # git_wrapper => '/home/services/git/nico.schottelius.org/hooks/post-update',
-   git_wrappermode => '06755',
+   # git_wrappermode => '06755',
-   gitorigin_branch => 'origin',
+   # gitorigin_branch => 'origin',
-   gitmaster_branch => 'master',
+   # gitmaster_branch => 'master',
 
 }