diff --git a/tldr/docker b/tldr/docker
index fc198a1d..2b3e5196 100644
--- a/tldr/docker
+++ b/tldr/docker
@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Manage Docker containers and images.
 > Some subcommands such as `docker run` have their own usage documentation.
-> More information: <https://docs.docker.com/engine/reference/commandline/cli/>.
+> More information: <https://docs.docker.com/reference/cli/docker/>.
 
 - List all Docker containers (running and stopped):
 
diff --git a/tldr/docker-update b/tldr/docker-update
index 35f6145e..c28ebe79 100644
--- a/tldr/docker-update
+++ b/tldr/docker-update
@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Update configuration of Docker containers.
 > This command is not supported for Windows containers.
-> More information: <https://docs.docker.com/engine/reference/commandline/update/>.
+> More information: <https://docs.docker.com/reference/cli/docker/container/update/>.
 
 - Update restart policy to apply when a specific container exits:
 
diff --git a/tldr/docker-volume b/tldr/docker-volume
index df2e069d..242e04db 100644
--- a/tldr/docker-volume
+++ b/tldr/docker-volume
@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # docker volume
 
 > Manage Docker volumes.
-> More information: <https://docs.docker.com/engine/reference/commandline/volume/>.
+> More information: <https://docs.docker.com/reference/cli/docker/volume/>.
 
 - Create a volume:
 
diff --git a/tldr/linode-cli-account b/tldr/linode-cli-account
index bf9ef6a7..8f9780b2 100644
--- a/tldr/linode-cli-account
+++ b/tldr/linode-cli-account
@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Manage Linode accounts.
 > See also: `linode-cli`.
-> More information: <https://www.linode.com/docs/products/tools/cli/guides/account/>.
+> More information: <https://techdocs.akamai.com/cloud-computing/docs/cli-commands-for-account-management>.
 
 - View account:
 
diff --git a/tldr/linode-cli-domains b/tldr/linode-cli-domains
index 733302ab..8eadc540 100644
--- a/tldr/linode-cli-domains
+++ b/tldr/linode-cli-domains
@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Manage Linode Domains and DNS configuration.
 > See also: `linode-cli`.
-> More information: <https://www.linode.com/docs/products/tools/cli/guides/domains/>.
+> More information: <https://techdocs.akamai.com/cloud-computing/docs/cli-commands-for-the-dns-manager>.
 
 - List all managed domains:
 
diff --git a/tldr/linode-cli-linodes b/tldr/linode-cli-linodes
index 3d9256ae..5d020f4a 100644
--- a/tldr/linode-cli-linodes
+++ b/tldr/linode-cli-linodes
@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Manage Linode instances.
 > See also: `linode-cli`.
-> More information: <https://www.linode.com/docs/products/tools/cli/guides/linode-instances/>.
+> More information: <https://techdocs.akamai.com/cloud-computing/docs/cli-commands-for-compute-instances>.
 
 - List all Linodes:
 
diff --git a/tldr/linode-cli-lke b/tldr/linode-cli-lke
index 6412f175..e3e09de7 100644
--- a/tldr/linode-cli-lke
+++ b/tldr/linode-cli-lke
@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Manage Linode Kubernetes Engine (LKE) clusters.
 > See also: `linode-cli`.
-> More information: <https://www.linode.com/docs/products/tools/cli/guides/linode-kubernetes-engine/>.
+> More information: <https://techdocs.akamai.com/cloud-computing/docs/cli-commands-for-lke>.
 
 - List all LKE clusters:
 
diff --git a/tldr/linode-cli-nodebalancers b/tldr/linode-cli-nodebalancers
index 8d3e874f..0f400ea9 100644
--- a/tldr/linode-cli-nodebalancers
+++ b/tldr/linode-cli-nodebalancers
@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Manage Linode NodeBalancers.
 > See also: `linode-cli`.
-> More information: <https://www.linode.com/docs/products/tools/cli/guides/nodebalancers/>.
+> More information: <https://techdocs.akamai.com/cloud-computing/docs/cli-commands-for-nodebalancers>.
 
 - List all NodeBalancers:
 
diff --git a/tldr/linode-cli-object-storage b/tldr/linode-cli-object-storage
index fb8fba8c..f0d536f9 100644
--- a/tldr/linode-cli-object-storage
+++ b/tldr/linode-cli-object-storage
@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Manage Linode Object Storage.
 > See also: `linode-cli`.
-> More information: <https://www.linode.com/docs/products/tools/cli/guides/object-storage/>.
+> More information: <https://techdocs.akamai.com/cloud-computing/docs/cli-commands-for-object-storage>.
 
 - List all Object Storage buckets:
 
diff --git a/tldr/linode-cli-volumes b/tldr/linode-cli-volumes
index 0fc85a66..1ec13632 100644
--- a/tldr/linode-cli-volumes
+++ b/tldr/linode-cli-volumes
@@ -7,7 +7,7 @@ source: https://github.com/tldr-pages/tldr.git
 
 > Manage Linode Volumes.
 > See also: `linode-cli`.
-> More information: <https://www.linode.com/docs/products/tools/cli/guides/block-storage-volumes/>.
+> More information: <https://techdocs.akamai.com/cloud-computing/docs/cli-commands-for-block-storage-volumes>.
 
 - List current Volumes:
 
diff --git a/tldr/linux/raspi-config b/tldr/linux/raspi-config
index ca99a841..88173fc0 100644
--- a/tldr/linux/raspi-config
+++ b/tldr/linux/raspi-config
@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # raspi-config
 
 > An `ncurses` terminal GUI to config a Raspberry Pi.
-> More information: <https://www.raspberrypi.org/documentation/computers/configuration.html>.
+> More information: <https://www.raspberrypi.com/documentation/computers/configuration.html>.
 
 - Start `raspi-config`:
 
diff --git a/tldr/linux/rpi-otp-private-key b/tldr/linux/rpi-otp-private-key
index c7280802..1a8fe958 100644
--- a/tldr/linux/rpi-otp-private-key
+++ b/tldr/linux/rpi-otp-private-key
@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # rpi-otp-private-key
 
 > Display the One-Time Programmable (OTP) private key of a Raspberry Pi.
-> More information: <https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#key-programming-script-rpi-otp-private-key>.
+> More information: <https://www.raspberrypi.com/documentation/computers/raspberry-pi.html#program-a-key-into-otp-with-rpi-otp-private-key>.
 
 - Read the OTP private key:
 
diff --git a/tldr/linux/vcgencmd b/tldr/linux/vcgencmd
index dcb5109d..c6b655ae 100644
--- a/tldr/linux/vcgencmd
+++ b/tldr/linux/vcgencmd
@@ -6,7 +6,7 @@ source: https://github.com/tldr-pages/tldr.git
 # vcgencmd
 
 > Print system information for a Raspberry Pi.
-> More information: <https://www.raspberrypi.org/documentation/computers/os.html#vcgencmd>.
+> More information: <https://www.raspberrypi.com/documentation/computers/os.html#vcgencmd>.
 
 - List all available commands:
 
diff --git a/tldr/netdiscover b/tldr/netdiscover
new file mode 100644
index 00000000..8524be33
--- /dev/null
+++ b/tldr/netdiscover
@@ -0,0 +1,13 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# netdiscover
+
+> Network scanner used to find live hosts on a network.
+> More information: <https://github.com/netdiscover-scanner/netdiscover>.
+
+- Scan the IP range on the network interface for active hosts:
+
+`netdiscover -r {{172.16.6.0/23}} -i {{ens244}}`
diff --git a/tldr/nettacker b/tldr/nettacker
new file mode 100644
index 00000000..53ca150d
--- /dev/null
+++ b/tldr/nettacker
@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# nettacker
+
+> Automate information gathering, vulnerability scanning and eventually generate a report.
+> More information: <https://nettacker.readthedocs.io/en/latest/Home/>.
+
+- List all available modules:
+
+`nettacker --show-all-modules`
+
+- Run a port scan on targets:
+
+`nettacker {{-m|--modules}} port_scan {{-i|--targets}} {{192.168.0.1/24,owasp.org,scanme.org,...}}`
+
+- Run a port scan on specific ports and targets listed in a file (newline separated):
+
+`nettacker {{-m|--modules}} port_scan {{-g|--ports}} {{22,80,443,...}} {{-l|--targets-list}} {{path/to/targets.txt}}`
+
+- Run ping test before scan and then run multiple scan types on target:
+
+`nettacker --ping-before-scan {{-m|--modules}} {{port_scan,subdomain_scan,waf_scan,...}} {{-g|--ports}} {{80,443}} {{-i|--targets}} {{owasp.org}}`
diff --git a/tldr/subfinder b/tldr/subfinder
index 5bb9c6c7..f6c160ad 100644
--- a/tldr/subfinder
+++ b/tldr/subfinder
@@ -15,16 +15,16 @@ source: https://github.com/tldr-pages/tldr.git
 
 - Show only the subdomains found:
 
-`subfinder --silent -d {{example.com}}`
+`subfinder -silent -d {{example.com}}`
 
-- Use a brute-force attack to find subdomains:
-
-`subfinder -d {{example.com}} -b`
-
-- Remove wildcard subdomains:
+- Show only active subdomains:
 
 `subfinder -nW -d {{example.com}}`
 
+- Use all sources for enumeration:
+
+`subfinder -all -d {{example.com}}`
+
 - Use a given comma-separated list of [r]esolvers:
 
 `subfinder -r {{8.8.8.8,1.1.1.1,...}} -d {{example.com}}`