1.先按照依赖，执行以下命令
sudo apt-get install devscripts debhelper libsnappy-dev
2.下载leveldb的源码，利用wget命令
wget https://github.com/google/leveldb/archive/v1.19.zip
3. 解压，利用unzip
unzip v1.19.zip &&cd leveldb-1.19/
4. 在leveldb-1.19目录中执行 “make”，编译好leveldb，会在当前目录生成一个目录“out-shared”
5. 执行一下命令
cd ../out-shared/
sudo mv libleveldb.* /usr/local/lib
cd ../include/
sudo cp -R leveldb /usr/local/include
sudo ldconfig
执行到此，leveldb安装完成，下面来测试一下（Python）
pip install leveldb
进入到ipython环境
import leveldb
db = leveldb.LevelDB('./db')
# single put
db.Put('hello','world')
print db.Get('hello')
# single delete
db.Delete('hello')
print db.Get('hello')
# multiple put/delete applied atomically,and committed to disk
batch = leveldb.WriteBatch()
batch.Put('hello','world')
batch.Put('hello again','world')
batch.Delete('hello')
db.Write(batch,sync = True)
