a lot

mongodb/auth.md

@@ -5,11 +5,32 @@ $ mongo
 > show dbs
 > use admin
 > db.createUser({
-    user: "light",
-    pwd: "123456",
+    user: "root",
+    pwd: "root",
     roles: [ { role: "userAdminAnyDatabase", db: "admin" }]
   }
 )
+
+use test
+db.createUser(
+  {
+    user: "tester",
+    pwd: "xyz123",
+    roles: [ { role: "readWrite", db: "test" },
+             { role: "read", db: "reporting" } ]
+  }
+)
+
+roles:
+readWrite
+read
+
+readAnyDatabase 任何数据库的只读权限
+
+readWriteAnyDatabase 任何数据库的读写权限
+
+userAdminAnyDatabase 任何数据库用户的管理权限
+dbAdminAnyDatabase 任何数据库的管理权限
 ```
 
 # role 

mongodb/use.md

@@ -0,0 +1,16 @@
+# mongodb 一般使用命令
+
+``` bash
+sudo service mongod restart
+
+
+```
+
+``` mongodb
+
+use admin
+
+db.system.users.find()
+db.system.users.remove({}) 
+
+```

python/virtualenv.md

@@ -1,4 +1,6 @@
 # virtualenv not
 
 
-> virtualenv --system-site-packages venv
+> virtualenv -p /usr/bin/python3 --system-site-packages venv
+
+> virtualenv -p /usr/bin/python2 --no-site-packages venv

raspberry/sound.md

@@ -0,0 +1,11 @@
+# 树莓派播放声音
+
+## 调整声音大小
+
+> alsamixer
+
+## 播放音频
+
+> omxplayer ***.
+> mplayer /home/pi/project/SoundPlayer/static/alert.wav
+> omxplayer /home/pi/project/SoundPlayer/static/alert.wav

raspberry/wifi.md

@@ -0,0 +1,12 @@
+# 树莓派连接wifi
+
+# 命令行
+
+> sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
+
+``` bash
+network={
+    ssid="The_ESSID_from_earlier"
+    psk="Your_wifi_password"
+}
+```

redis/配置.md

@@ -0,0 +1,81 @@
+# redis 安装配置
+
+## 安装
+
+``` bash
+cd /srv
+wget http://download.redis.io/releases/redis-4.0.1.tar.gz
+tar xzf redis-4.0.1.tar.gz
+cd redis-4.0.1
+make
+make test
+```
+
+## 配置
+
+``` bash
+sudo ln -s /srv/redis-4.0.1/src/redis-server /usr/local/bin/
+sudo ln -s /srv/redis-4.0.1/src/redis-cli /usr/local/bin/
+mkdir /etc/redis
+cp /srv/redis-4.0.1/redis.conf /etc/redis
+#修改redis.conf（/etc/redis下）
+#打开后台运行选项
+daemonize yes
+#设置日志文件路径
+logfile"/var/log/redis/redis.log"
+```
+
+> nano /etc/init.d/redis
+
+``` bash
+#!/bin/sh
+# chkconfig: 2345 10 90
+# description: Start and Stop redis
+
+PATH=/usr/local/bin
+REDISPORT=6379
+EXEC=/usr/local/bin/redis-server
+REDIS_CLI=/usr/local/bin/redis-cli
+PIDFILE=/var/run/redis_6379.pid
+CONF="/etc/redis/redis.conf"
+
+case "$1" in
+    start)
+        if [ -f $PIDFILE ]
+        then
+            echo "$PIDFILE exists, process is already running or crashed."
+        else
+            echo "Starting Redis server..."
+            $EXEC $CONF
+        fi
+        if [ "$?"="0" ]
+        then
+            echo "Redis is running..."
+        fi
+        ;;
+    stop)
+        if [ ! -f $PIDFILE ]
+        then
+            echo "$PIDFILE exists, process is not running."
+        else
+            PID=$(cat $PIDFILE)
+            echo "Stopping..."
+            $REDIS_CLI -p $REDISPORT SHUTDOWN
+            while [ -x $PIDFILE ]
+            do
+                echo "Waiting for Redis to shutdown..."
+                sleep 1
+            done
+            echo "Redis stopped"
+        fi
+        ;;
+    restart|force-reload)
+        ${0} stop
+        ${0} start
+        ;;
+    *)
+        echo "Usage: /etc/init.d/redis {start|stop|restart|fore-reload}"
+        exit 1
+esac
+
+```

ubuntu/scp.md

@@ -0,0 +1 @@
+scp -P 2210 -r static pi@myserver:/home/pi/