diff --git a/IT/linux/index.md b/IT/linux/index.md
index dda2271..89ece23 100644
--- a/IT/linux/index.md
+++ b/IT/linux/index.md
@@ -50,3 +50,8 @@ Exec=/bin/sh -c 'while read -r trg; do case $trg in linux) exit 0; esac; done; /
 systemd.unit=emergency.target
 5. press ctrl+x
 6. put root writable with `mount -o rw,remount /`
+
+## disable IPV6
+
+`sysctl -b net.ipv6.conf.all.disable_ipv6=1`
+