diff --git a/README.md b/README.md
index 442531a..d4789eb 100644
--- a/README.md
+++ b/README.md
@@ -4,15 +4,10 @@
 
 more informations on https://envs.net/chat/matrix/
 
-**synapse blocklist tool:**
-
-An collection of modules for Synapse to block temporary email addresses and block invite-spam.
-
-see: https://git.envs.net/envs/synapse_blocklist_module
-
 ## useful documentations
 
-\- [matrix-spec](https://matrix.org/docs/spec/)  
+\- [matrix-spec](https://spec.matrix.org/latest/)
+
 \- [synapse INSTALL.md](https://github.com/matrix-org/synapse/blob/master/docs/setup/installation.md)  
 \- [synapse default homeserver.yaml](https://github.com/matrix-org/synapse/blob/master/docs/sample_config.yaml)
 
@@ -24,3 +19,17 @@ see: https://git.envs.net/envs/synapse_blocklist_module
 
 \- [matrix-synchrotron-balancer](https://github.com/Sorunome/matrix-synchrotron-balancer)  
 \- [matrix-media-repo](https://github.com/turt2live/matrix-media-repo)
+
+## useful tools
+
+### envs - synapse blocklist tool
+
+An collection of modules for Synapse to block temporary email addresses and invite-spam.
+
+see: https://git.envs.net/envs/synapse_blocklist_module
+
+### synadm
+
+Command line admin tool for Synapse
+
+repo: [https://github.com/JOJ0/synadm](https://github.com/JOJ0/synadm)
diff --git a/usr/local/bin/README.md b/usr/local/bin/README.md
index ddc8b5a..f4d61dd 100644
--- a/usr/local/bin/README.md
+++ b/usr/local/bin/README.md
@@ -1,8 +1,12 @@
 # useful aliases
 
+**deps.:**
+
+install moreutils  
+`apt install moreutils`
+
 simple add it to your alias file.
 
-**deps.:**
 ```
 source "$HOME/.token" # contains $token
 server='server.tld'
@@ -28,11 +32,15 @@ matrix-show_users() {
 
 ```bash
 matrix-deactivate-users() {
-	while read i; do
-		printf '%s\n' "$i"; \
-		curl -s -H "Authorization: Bearer $token" -X POST 'https://'"$server"'/_synapse/admin/v1/deactivate/'"$i" -d '{"erase": true}'; printf '\n'
-	done < ~/deactivate_users.txt
-	echo > ~/deactivate_users.txt
+	if [ -s ~/deactivate_users.txt ]; then
+		while read i; do
+			printf '%s\n' "$i"; \
+			curl -s -H "Authorization: Bearer $token" -X POST 'https://'"$server"'/_synapse/admin/v1/deactivate/'"$i" -d '{"erase": true}'; printf '\n'
+		done < ~/deactivate_users.txt
+		echo > ~/deactivate_users.txt
+	else
+		printf '~/deactivate_users.txt is empty.\n'
+	fi
 }
 ```
 
@@ -42,7 +50,6 @@ matrix-deactivate-users() {
 matrix-remove-empty-rooms() {
 	TOPURGE=$(curl -s -H "Authorization: Bearer $token" -X GET \
 	  'https://'"$server"'/_synapse/admin/v1/rooms?limit=1000000' | jq -Mr '.rooms[] | select(.joined_local_members == 0) | .room_id')
-
 	for i in $TOPURGE; do
 		printf 'processing room %s ..\n' "$i"
 		curl -s -w "\nResponse code: %{response_code}\n" -H "Authorization: Bearer $token" -H "Content-Type: application/json" -X DELETE -d '{}' \
@@ -55,20 +62,24 @@ matrix-remove-empty-rooms() {
 
 ```bash
 matrix-purge-rooms() {
-	echo > ~/blocked_members.txt
-	while read i; do
-		printf '%s\n' "$i"
-		curl -s -H "Authorization: Bearer $token" -X GET 'https://'"$server"'/_synapse/admin/v1/rooms/'"$i"'/members' | jq -Mr .members[] >> ~/blocked_members.txt
-		curl -s -H "Authorization: Bearer $token" -X DELETE 'https://'"$server"'/_synapse/admin/v1/rooms/'"$i" -d '{"purge": true, "block": true}'
-		printf '\n'
-	done < ~/purge_rooms.txt
-	sed -i -e '/^$/d' ~/blocked_members.txt
-	sort -u -o ~/blocked_members.txt{,}
-	for i in $(grep "$server" ~/blocked_members.txt); do
-		printf '%s\n' "$i"
-		curl -s -H "Authorization: Bearer $token" -X POST 'https://'"$server"'/_synapse/admin/v1/deactivate/'"$i" -d '{"erase": true}'
-	done
-	sed -i '/'"$server"'/d' ~/blocked_members.txt
+	if [ -s ~/purge_rooms.txt ]; then
+		echo > ~/blocked_members.txt
+		while read i; do
+			printf '%s\n' "$i"
+			curl -s -H "Authorization: Bearer $token" -X GET 'https://'"$server"'/_synapse/admin/v1/rooms/'"$i"'/members' | jq -Mr .members[] >> ~/blocked_members.txt >/dev/null 2>&1
+			curl -s -H "Authorization: Bearer $token" -X DELETE 'https://'"$server"'/_synapse/admin/v1/rooms/'"$i" -d '{"purge": true, "block": true}'
+			printf '\n'
+		done < ~/purge_rooms.txt
+		sed -i -e '/^$/d' ~/blocked_members.txt
+		sort -u -o ~/blocked_members.txt{,}
+		for i in $(grep "$server" ~/blocked_members.txt); do
+			printf '%s\n' "$i"
+			curl -s -H "Authorization: Bearer $token" -X POST 'https://'"$server"'/_synapse/admin/v1/deactivate/'"$i" -d '{"erase": true}'
+		done
+		sed -i '/'"$server"'/d' ~/blocked_members.txt
+	else
+		printf '~/purge_rooms.txt is empty.\n'
+	fi
 }
 ```
 
@@ -76,9 +87,8 @@ matrix-purge-rooms() {
 
 ```bash
 matrix-get-blocked_rooms() {
-	sudo -iu postgres psql -d matrix -c "SELECT room_id FROM blocked_rooms" > ~/blocked_rooms.tmp
-	sed -i -e 's/ //' -e '1,2d' ~/blocked_rooms.tmp
-	head -n -2 ~/blocked_rooms.tmp > ~/blocked_rooms.txt
-	rm ~/blocked_rooms.tmp
+	sudo -iu postgres psql -d matrix -c "SELECT room_id FROM blocked_rooms" > ~/blocked_rooms.txt
+	sed -i -e 's/ //' -e '1,2d' ~/blocked_rooms.txt
+	head -n -2 ~/blocked_rooms.txt | sponge ~/blocked_rooms.txt
 }
 ```