added memo

memo/ffmpeg-command.md

@@ -0,0 +1,3 @@
+```bash
+ffmpeg -ss 00:01:00 -to 00:02:30 -i input.mp4 -c copy output.mp4
+```

memo/spanner-setting.md

@@ -0,0 +1,43 @@
+## Install gcloud cli
+https://cloud.google.com/sdk/docs/install
+
+## Run spanner docker
+https://cloud.google.com/spanner/docs/emulator#start-emulator-gcloud
+
+### Set gcloud cli to point to local
+```
+export SPANNER_EMULATOR_HOST=localhost:9010
+```
+
+### Run spanner code on terminal
+
+```
+# Create instances
+gcloud spanner instances create testinstance \
+  --config=emulator-config \
+  --description="Test Instance" \
+  --nodes=1
+
+# Create database
+gcloud spanner databases create testdb --instance=testinstance
+
+# Create table
+gcloud spanner databases ddl update testdb --instance=testinstance \
+  --ddl="CREATE TABLE Singers (
+    SingerId INT64 NOT NULL,
+    FirstName STRING(1024),
+    LastName  STRING(1024),
+    SingerInfo BYTES(MAX)
+  ) PRIMARY KEY (SingerId)"
+```
+
+
+### Connect to spanner through dbeaver
+
+1.	Install DBeaver CE (free) on Mac.
+2.	Install the Spanner JDBC driver.
+3.	Create a new connection → Google Cloud Spanner.
+	•	Project ID: test-project
+	•	Instance: testinstance
+	•	Database: testdb
+    •	set autoConfigEmulator to true

memo/ufw-memo.md

@@ -1,3 +1,8 @@
-```
+```bash
 sudo ufw allow from 192.168.70.0/24 to any port 33060
+```
+
+```bash
+sudo ufw status numbered
+sudo ufw delete [number]
 ```

memo/venv-memo.md

@@ -6,7 +6,8 @@ source <env-name>/bin/activate
 deactivate
 ```
 
-```
+# Freeze requirement
+```bash
 pip freeze > requirements.txt
 pip install -r requirements.txt
 ```