diff --git a/nontech/politics/people/shkolnikov.txt b/nontech/politics/people/shkolnikov.txt
index f6cdb9f04..70e672301 100644
--- a/nontech/politics/people/shkolnikov.txt
+++ b/nontech/politics/people/shkolnikov.txt
@@ -50,3 +50,6 @@ DayTV - Titov - Shkolnikov - World System Crush of 50:43
     https://www.youtube.com/watch?v=99c7V1y4BZ4
 DayTV - Titov - Shkolnikov - Elite was not Ready to UA of 53:31
     https://www.youtube.com/watch?v=Af60RCMSDbc
+2019
+StreetOfTruth - Shkolnikov - Round Table 9 of 1:17:58
+    https://www.youtube.com/watch?v=naWk8W7bDio
diff --git a/os/linux/internals/cgroups/user-namespaces.txt b/os/linux/internals/cgroups/user-namespaces.txt
new file mode 100644
index 000000000..7f26f3914
--- /dev/null
+++ b/os/linux/internals/cgroups/user-namespaces.txt
@@ -0,0 +1 @@
+https://man.archlinux.org/man/user_namespaces.7
diff --git a/os/unix/admin/security/firewall/nft-netfilter.txt b/os/unix/admin/security/firewall/nft-netfilter.txt
index f613a2a38..fd78fc162 100644
--- a/os/unix/admin/security/firewall/nft-netfilter.txt
+++ b/os/unix/admin/security/firewall/nft-netfilter.txt
@@ -19,6 +19,7 @@ https://www.mankier.com/8/nft
 https://www.netfilter.org/projects/nftables/manpage.html
 
 tutorial
+https://ral-arturo.org/2020/11/22/python-nftables-tutorial.html
 https://github.com/aborrero/python-nftables-tutorial
 https://people.netfilter.org/pablo/nft-tutorial.pdf
     ! p14
diff --git a/os/unix/rdp/apache-guacamole.txt b/os/unix/rdp/apache-guacamole.txt
index 1605332fe..da5f08cd4 100644
--- a/os/unix/rdp/apache-guacamole.txt
+++ b/os/unix/rdp/apache-guacamole.txt
@@ -1,4 +1,5 @@
 http://guacamole.apache.org/
+https://guacamole.apache.org/doc/gug/
 
 2016
 https://www.tecmint.com/guacamole-access-remote-linux-windows-machines-via-web-browser/
diff --git a/science/ai/code-assist/cursor.txt b/science/ai/code-assist/cursor.txt
index 7e6edd6be..2ae0fb301 100644
--- a/science/ai/code-assist/cursor.txt
+++ b/science/ai/code-assist/cursor.txt
@@ -1,4 +1,6 @@
 https://github.com/yeongpin/cursor-free-vip
 
+https://cursor.directory/
+
 2025
 https://newsletter.pragmaticengineer.com/p/cursor
diff --git a/security/isolation/firejail.txt b/security/isolation/firejail.txt
index c2139c0b9..5998b60d7 100644
--- a/security/isolation/firejail.txt
+++ b/security/isolation/firejail.txt
@@ -14,8 +14,23 @@ https://firejail.wordpress.com/features-3/man-firejail/
 
 https://firejail.wordpress.com/blog
 
-https://wiki.archlinux.org/title/firejail
 https://wiki.gentoo.org/wiki/Firejail
+https://wiki.archlinux.org/title/Firejail
+
+profiles
+https://github.com/netblue30/firejail/tree/master/etc
+https://github.com/netblue30/firejail/tree/master/etc/net
+https://github.com/netblue30/firejail/tree/master/ci/check/profiles
+
+cfg
+https://github.com/netblue30/firejail/blob/master/etc/firejail.config
+templates
+https://github.com/netblue30/firejail/blob/master/etc/templates/profile.template
+
+contrib
+https://github.com/netblue30/firejail/tree/master/contrib
+https://github.com/netblue30/firejail/blob/master/contrib/syscalls.sh
+    with strace
 
 whatsnew
 https://firejail.wordpress.com/download-2/release-notes/
@@ -28,3 +43,7 @@ https://linuxthebest.net/firejail-bezopasnyj-zapusk-potentsialno-uyazvimykh-pril
 https://www.brighteon.com/channels/netblue30
 https://www.bitchute.com/channel/netblue30/
 https://www.linux.org.ru/articles/desktop/17042789
+
+cli
+firejail
+    --debug $Program > $PathToOutputFile