深海游弋的鱼 – 第 5 页

Ubuntu Server 18.04 LTS隐藏Tomcat-9.0.16.0的版本号与操作系统类型

其他方案

其他的方案跟 Ubuntu 14.04隐藏Tomcat-7.0.52的版本号与操作系统类型是一致的，但是具体的细节上存在不小的差异，还是需要记录一下。

$ cd ~

$ mkdir catalina

$ cd catalina

$ cp /usr/share/tomcat9/lib/catalina.jar .

$ unzip catalina.jar

$ cd org/apache/catalina/util

$ vim ServerInfo.properties

$ cd ~

$ mkdir catalina

$ cd catalina

$ cp /usr/share/tomcat9/lib/catalina.jar .

$ unzip catalina.jar

$ cd org/apache/catalina/util

$ vim ServerInfo.properties

可以看到里面的内容如下：

# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

server.info=Apache Tomcat/9.0.16 (Ubuntu)
server.number=9.0.16.0
server.built=Sep 11 2019 19:47:51 UTC

# The ASF licenses this file to You under the Apache License, Version 2.0

# (the "License"); you may not use this file except in compliance with

# the License. You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

server.info=Apache Tomcat/9.0.16 (Ubuntu)

server.number=9.0.16.0

server.built=Sep 11 2019 19:47:51 UTC

直接注释掉里面的内容，如下：

# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# server.info=Apache Tomcat/9.0.16 (Ubuntu)
# server.number=9.0.16.0
# server.built=Sep 11 2019 19:47:51 UTC

# The ASF licenses this file to You under the Apache License, Version 2.0

# (the "License"); you may not use this file except in compliance with

# the License. You may obtain a copy of the License at

# http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

# server.info=Apache Tomcat/9.0.16 (Ubuntu)

# server.number=9.0.16.0

# server.built=Sep 11 2019 19:47:51 UTC

修改完成后，把修改完成的数据存储到catalina.jar中。

$ cd ~

$ cd catalina

$ sudo apt install openjdk-11-jdk-headless

$ jar uvf catalina.jar org/apache/catalina/util/ServerInfo.properties

$ cd ~

$ cd catalina

$ sudo apt install openjdk-11-jdk-headless

$ jar uvf catalina.jar org/apache/catalina/util/ServerInfo.properties

把修改后的catalina.jar放回到Tomcat的目录下面:

$ cd ~

$ cd catalina

$ sudo unlink /usr/share/tomcat9/lib/catalina.jar 

$ sudo mv /usr/share/java/tomcat9-catalina.jar /usr/share/java/tomcat9-catalina.jar.old

$ sudo cp catalina.jar /usr/share/java/

$ sudo chmod +r /usr/share/java/catalina.jar

$ cd /usr/share/tomcat9/lib

$ sudo ln -s ../../java/catalina.jar catalina.jar

$ cd ~

$ cd catalina

$ sudo unlink /usr/share/tomcat9/lib/catalina.jar

$ sudo mv /usr/share/java/tomcat9-catalina.jar /usr/share/java/tomcat9-catalina.jar.old

$ sudo cp catalina.jar /usr/share/java/

$ sudo chmod +r /usr/share/java/catalina.jar

$ cd /usr/share/tomcat9/lib

$ sudo ln -s ../../java/catalina.jar catalina.jar

重启Tomcat的服务

$ sudo service tomcat9 restart

1	$ sudo service tomcat9 restart

参考链接

腾讯云Ubuntu Server 16.04.7 LTS升级系统到Ubuntu Server 18.04.5 LTS之后letsencrypt证书更新出现异常“ImportError: cannot import name _remove_dead_weakref”

腾讯云Ubuntu Server 16.04.7 LTS升级系统到Ubuntu Server 18.04.5 LTS之后，letsencrypt证书更新出现异常,如下：

$ sudo ./letsencrypt-auto
Error: couldn't get currently installed version for /opt/eff.org/certbot/venv/bin/letsencrypt: 
Traceback (most recent call last):
  File "/opt/eff.org/certbot/venv/bin/letsencrypt", line 7, in <module>
    from certbot.main import main
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot/main.py", line 2, in <module>
    from certbot._internal import main as internal_main
  File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot/_internal/main.py", line 6, in <module>
    import logging.handlers
  File "/usr/lib/python2.7/logging/__init__.py", line 26, in <module>
    import sys, os, time, cStringIO, traceback, warnings, weakref, collections
  File "/usr/lib/python2.7/weakref.py", line 14, in <module>
    from _weakref import (
ImportError: cannot import name _remove_dead_weakref

$ sudo ./letsencrypt-auto

Error: couldn't get currently installed version for /opt/eff.org/certbot/venv/bin/letsencrypt:

Traceback (most recent call last):

File "/opt/eff.org/certbot/venv/bin/letsencrypt", line 7, in <module>

from certbot.main import main

File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot/main.py", line 2, in <module>

from certbot._internal import main as internal_main

File "/opt/eff.org/certbot/venv/local/lib/python2.7/site-packages/certbot/_internal/main.py", line 6, in <module>

import logging.handlers

File "/usr/lib/python2.7/logging/__init__.py", line 26, in <module>

import sys, os, time, cStringIO, traceback, warnings, weakref, collections

File "/usr/lib/python2.7/weakref.py", line 14, in <module>

from _weakref import (

ImportError: cannot import name _remove_dead_weakref

原因为系统版本变化过大导致以前安装的Python组件不能适应最新的系统，最简单的方法就是删除之前安装的Python组件，让letsencrypt重新安装即可。

$ sudo apt-get install python-pip

$ sudo rm -rf /opt/eff.org/

$ sudo ./letsencrypt-auto

$ sudo apt-get install python-pip

$ sudo rm -rf /opt/eff.org/

$ sudo ./letsencrypt-auto

参考链接

Cannot renew certificate “ImportError: cannot import name _remove_dead_weakref”

腾讯云Ubuntu Server 16.04.7 LTS升级系统到Ubuntu Server 18.04.5 LTS

参考阿里云ECS ubuntu 14.04.5 LTS升级到ubuntu 16.04.2 LTS / 阿里云从ubuntu16.04.5升级到ubuntu 18.04.3后调整PHP 7.0到PHP 7.2 整个的升级步骤是差不多的，腾讯的升级流程更加顺利。

但是在升级完成之后，遇到了一个域名解析问题，报错如下：

$ ping www.baidu.com
ping: www.baidu.com: Temporary failure in name resolution

$ sudo apt-get update
Err:1 http://mirrors.tencentyun.com/ubuntu bionic InRelease
  Temporary failure resolving 'mirrors.tencentyun.com'
Err:2 http://mirrors.tencentyun.com/ubuntu bionic-security InRelease
  Temporary failure resolving 'mirrors.tencentyun.com'
Err:3 http://mirrors.tencentyun.com/ubuntu bionic-updates InRelease
  Temporary failure resolving 'mirrors.tencentyun.com'

$ ping www.baidu.com

ping: www.baidu.com: Temporary failure in name resolution

$ sudo apt-get update

Err:1 http://mirrors.tencentyun.com/ubuntu bionic InRelease

Temporary failure resolving 'mirrors.tencentyun.com'

Err:2 http://mirrors.tencentyun.com/ubuntu bionic-security InRelease

Temporary failure resolving 'mirrors.tencentyun.com'

Err:3 http://mirrors.tencentyun.com/ubuntu bionic-updates InRelease

Temporary failure resolving 'mirrors.tencentyun.com'

这个原因是因为我们在安装过程中，覆盖了腾讯设置的域名解析服务配置文件。

这个配置文件是/etc/resolv.conf。

但是，在Ubuntu Server 18.04.5 LTS系统上，直接修改/etc/resolv.conf的话，重启系统之后，设置会被还原。我们需要修改/etc/systemd/resolved.conf才行。

根据地域的不同，服务器的地址存在差异，参考下面的脚本即可。

广州服务器：

# 不存在则增加
$ sudo sed -i "s/^#DNS=.*/DNS=10.138.224.65 10.182.20.26 10.182.24.12/g" /etc/systemd/resolved.conf

# 存在则替换
$ sudo sed -i "s/^DNS=.*/DNS=10.138.224.65 10.182.20.26 10.182.24.12/g" /etc/systemd/resolved.conf

# 重启服务，配置生效
$ sudo systemctl restart systemd-resolved.service

# 不存在则增加

$ sudo sed -i "s/^#DNS=.*/DNS=10.138.224.65 10.182.20.26 10.182.24.12/g" /etc/systemd/resolved.conf

# 存在则替换

$ sudo sed -i "s/^DNS=.*/DNS=10.138.224.65 10.182.20.26 10.182.24.12/g" /etc/systemd/resolved.conf

# 重启服务，配置生效

$ sudo systemctl restart systemd-resolved.service

上海服务器：

# 不存在则增加
$ sudo sed -i "s/^#DNS=.*/DNS=10.236.158.106 10.237.148.54 10.237.148.60/g" /etc/systemd/resolved.conf

# 存在则替换
$ sudo sed -i "s/^DNS=.*/DNS=10.236.158.106 10.237.148.54 10.237.148.60/g" /etc/systemd/resolved.conf

# 重启服务，配置生效
$ sudo systemctl restart systemd-resolved.service

# 不存在则增加

$ sudo sed -i "s/^#DNS=.*/DNS=10.236.158.106 10.237.148.54 10.237.148.60/g" /etc/systemd/resolved.conf

# 存在则替换

$ sudo sed -i "s/^DNS=.*/DNS=10.236.158.106 10.237.148.54 10.237.148.60/g" /etc/systemd/resolved.conf

# 重启服务，配置生效

$ sudo systemctl restart systemd-resolved.service

香港服务器：

# 不存在则增加
$ sudo sed -i "s/^#DNS=.*/DNS=10.243.28.52 10.145.0.57 10.145.0.58/g" /etc/systemd/resolved.conf

# 存在则替换
$ sudo sed -i "s/^DNS=.*/DNS=10.243.28.52 10.145.0.57 10.145.0.58/g" /etc/systemd/resolved.conf

# 重启服务，配置生效
$ sudo systemctl restart systemd-resolved.service

# 不存在则增加

$ sudo sed -i "s/^#DNS=.*/DNS=10.243.28.52 10.145.0.57 10.145.0.58/g" /etc/systemd/resolved.conf

# 存在则替换

$ sudo sed -i "s/^DNS=.*/DNS=10.243.28.52 10.145.0.57 10.145.0.58/g" /etc/systemd/resolved.conf

# 重启服务，配置生效

$ sudo systemctl restart systemd-resolved.service

参考链接

Ubuntu 18.04/20.04更换国内源

今天发现cn.archive.ubuntu.com不能更新了，只能换成国内源:

$ sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

# 阿里云
$ sudo sed -i "s/cn.archive.ubuntu.com/mirrors.aliyun.com/g" /etc/apt/sources.list

$ sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

# 阿里云

$ sudo sed -i "s/cn.archive.ubuntu.com/mirrors.aliyun.com/g" /etc/apt/sources.list

参考链接

ubuntu 阿里云源

ubuntu 18.04系统报错ModuleNotFoundError: No module named 'pip._internal'

重新安装的ubuntu 18.04系统上初次安装python3-pip之后，执行升级命令，出现如下错误信息：

$ sudo apt-get install python3-pip

$ sudo pip3 install --upgrade pip
Traceback (most recent call last):
  File "/usr/local/bin/pip3", line 7, in <module>
    from pip._internal import main
ModuleNotFoundError: No module named 'pip._internal'

$ sudo apt-get install python3-pip

$ sudo pip3 install --upgrade pip

Traceback (most recent call last):

File "/usr/local/bin/pip3", line 7, in <module>

from pip._internal import main

ModuleNotFoundError: No module named 'pip._internal'

解决方法为重新升级安装一次 pip，如下：

$ python3 -m pip install --upgrade pip

1	$ python3 -m pip install --upgrade pip

参考链接

No module named 'pip._internal.cli.main'

利用Ubuntu 18.04恢复群晖(Synology)NAS Raid1(DSM 6.x)硬盘数据

如果 Synology NAS 出现故障，则可以使用计算机和 Ubuntu live CD 轻松恢复其硬盘上存储的数据。确保 Synology NAS 硬盘上运行的文件系统是 EXT4 或 Btrfs，然后按照以下步骤恢复数据。此处我们以 Ubuntu 18.04 版本为例。

继续阅读利用Ubuntu 18.04恢复群晖(Synology)NAS Raid1(DSM 6.x)硬盘数据

ubuntu 18.04系统/var/log/auth.log文件不存在

通过 /var/log/auth.log 文件可以查看一些关于 ssh 登陆、sudo 命令的信息。尤其是 denyhosts 依赖这个日志拦截非法的登陆攻击。但是，我最近遇到了一个问题，在阿里云的一些主机上没有这个文件，或者日志文件在自动备份（比如被重命名成 /var/log/auth.log.1 ）之后，没有重新生成新的 /var/log/auth.log 。

检查 /var/log 目录的所有者信息，如下：

$ ls -l /var/ | grep log
drwxr-xr-x 23 root    syslog  4096 Apr  8 18:04 log

1 2	$ ls -l /var/ \| grep log drwxr-xr-x 23 root syslog 4096 Apr 8 18:04 log

这里的所有者权限信息是不正确的，缺少所有者所在组的文件创建权限，导致文件创建出现问题。因此需要如下命令：

$ chmod -R 775 /data/log

$ ls -l /var/ | grep log
drwxrwxr-x 23 root    syslog  4096 Apr  8 18:04 log

$ chmod -R 775 /data/log

$ ls -l /var/ | grep log

drwxrwxr-x 23 root syslog 4096 Apr 8 18:04 log

接着手工创建日志文件，如下：

$ touch /var/log/auth.log

$ chmod 640 /var/log/auth.log 

$ chown syslog.adm /var/log/auth.log 

$ ls -la /var/log/auth.log

$ touch /var/log/auth.log

$ chmod 640 /var/log/auth.log

$ chown syslog.adm /var/log/auth.log

$ ls -la /var/log/auth.log

参考链接

/var/log/auth.log文件不存在

ubuntu 18.04使用apt-get安装eclipse无法启动

ubuntu 18.04使用apt-get安装eclipse无法启动,报告如下错误：

继续阅读ubuntu 18.04使用apt-get安装eclipse无法启动

阿里云从ubuntu16.04.5升级到ubuntu 18.04.3后调整PHP 7.0到PHP 7.2

目前使用的阿里云服务器是通过参考阿里云ECS ubuntu 14.04.5 LTS升级到ubuntu 16.04.2 LTS 升级上来的。

升级之后，默认情况下，依旧使用的是 ubuntu 16.04.5 自带的 PHP 7.0 ，然而 ubuntu 18.04.3 系统自带的是 PHP 7.2 。我们希望在升级之后的系统上，能启用比较新版本的 PHP 7.2 。

其实更关键的是，在 ubuntu 18.04.3 系统上， PHP 7.0 相关的部分附加组件，比如 PHP7.0-CURL 已经没办法通过源安装了，安全补丁相关的更新估计也不能及时提供。另外就是较新版本的 PHP 7.2 在性能上有不错的提升。

执行如下切换命令（PHP-FPM模式）：

$ sudo apt-get install php7.2-fpm

# 备份配置文件
$ sudo mv /etc/php/7.2/fpm/php.ini /etc/php/7.2/fpm/php.ini.bak

# 拷贝配置文件
$ sudo cp /etc/php/7.0/fpm/php.ini /etc/php/7.2/fpm/php.ini

$ sudo systemctl disable php7.0-fpm

# 调整Apache与PHP-FPM通信的端口
$ sudo sed -i "s/php7.0-fpm.sock/php7.2-fpm.sock/g" /etc/apache2/sites-enabled/*.conf

# 禁用旧服务
$ sudo service php7.0-fpm stop

#重启服务
$ sudo service php7.2-fpm restart

$ sudo service apache2 restart

# 如果使用了WP-Statistics统计插件，需要安装依赖
$ sudo apt-get install php7.2-curl
 
$ sudo apt-get install php7.2-bcmath

$ sudo apt-get install php7.2-fpm

# 备份配置文件

$ sudo mv /etc/php/7.2/fpm/php.ini /etc/php/7.2/fpm/php.ini.bak

# 拷贝配置文件

$ sudo cp /etc/php/7.0/fpm/php.ini /etc/php/7.2/fpm/php.ini

$ sudo systemctl disable php7.0-fpm

# 调整Apache与PHP-FPM通信的端口

$ sudo sed -i "s/php7.0-fpm.sock/php7.2-fpm.sock/g" /etc/apache2/sites-enabled/*.conf

# 禁用旧服务

$ sudo service php7.0-fpm stop

#重启服务

$ sudo service php7.2-fpm restart

$ sudo service apache2 restart

# 如果使用了WP-Statistics统计插件，需要安装依赖

$ sudo apt-get install php7.2-curl

$ sudo apt-get install php7.2-bcmath

网站响应速度有明显的提升，以前的卡顿表现明显改善。

参考链接

ubuntu 18.04下安装CUDA 10.1以及cuDNN的安装

安装最新版本的 CUDA 10.1：

# 卸载之前已经安装的cuda
$ sudo apt-get remove nvidia-cuda-toolkit

$ wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-ubuntu1804.pin

$ sudo mv cuda-ubuntu1804.pin /etc/apt/preferences.d/cuda-repository-pin-600

$ wget http://developer.download.nvidia.com/compute/cuda/10.1/Prod/local_installers/cuda-repo-ubuntu1804-10-1-local-10.1.243-418.87.00_1.0-1_amd64.deb

$ sudo dpkg -i cuda-repo-ubuntu1804-10-1-local-10.1.243-418.87.00_1.0-1_amd64.deb

$ sudo apt-key add /var/cuda-repo-10-1-local-10.1.243-418.87.00/7fa2af80.pub

$ sudo apt-get update

$ sudo apt-get -y install cuda

# 部分驱动可能会更新，需要执行更新，否则可能依旧不正常
$ sudo apt-get dist-upgrade

$ sudo apt-get autoremove

# 可能需要删除一下XWindow的配置文件，否则驱动可能不能正常加载
$ sudo rm -rf ~/.Xauthority 

# 如果出现如下错误
# ubuntu 18.04 "nvidia-340 导致 /usr/lib/x86_64-linux-gnu/libGL.so.1 
# 转移到 /usr/lib/x86_64-linux-gnu/libGL.so.1.distrib"
# 参考 http://www.mobibrw.com/?p=21739 

# 删除安装源，可以节约几个GB的磁盘，安装完成后这部分已经用不上了
$ sudo apt-get remove --purge cuda-repo-ubuntu1804-10-1-local-10.1.243-418.87.00

# 卸载之前已经安装的cuda

$ sudo apt-get remove nvidia-cuda-toolkit

$ wget https://developer.download.nvidia.com/compute/cuda/repos/ubuntu1804/x86_64/cuda-ubuntu1804.pin

$ sudo mv cuda-ubuntu1804.pin /etc/apt/preferences.d/cuda-repository-pin-600

$ wget http://developer.download.nvidia.com/compute/cuda/10.1/Prod/local_installers/cuda-repo-ubuntu1804-10-1-local-10.1.243-418.87.00_1.0-1_amd64.deb

$ sudo dpkg -i cuda-repo-ubuntu1804-10-1-local-10.1.243-418.87.00_1.0-1_amd64.deb

$ sudo apt-key add /var/cuda-repo-10-1-local-10.1.243-418.87.00/7fa2af80.pub

$ sudo apt-get update

$ sudo apt-get -y install cuda

# 部分驱动可能会更新，需要执行更新，否则可能依旧不正常

$ sudo apt-get dist-upgrade

$ sudo apt-get autoremove

# 可能需要删除一下XWindow的配置文件，否则驱动可能不能正常加载

$ sudo rm -rf ~/.Xauthority

# 如果出现如下错误

# ubuntu 18.04 "nvidia-340 导致 /usr/lib/x86_64-linux-gnu/libGL.so.1

# 转移到 /usr/lib/x86_64-linux-gnu/libGL.so.1.distrib"

# 参考 http://www.mobibrw.com/?p=21739

# 删除安装源，可以节约几个GB的磁盘，安装完成后这部分已经用不上了

$ sudo apt-get remove --purge cuda-repo-ubuntu1804-10-1-local-10.1.243-418.87.00

安装对应版本的cuDNN:

$ wget https://www.mobibrw.com/wp-content/uploads/2019/11/libcudnn7_7.6.5.32-1cuda10.1_amd64.deb_.zip

$ wget https://www.mobibrw.com/wp-content/uploads/2019/11/libcudnn7-dev_7.6.5.32-1cuda10.1_amd64.deb_.zip

$ wget https://www.mobibrw.com/wp-content/uploads/2019/11/libcudnn7-doc_7.6.5.32-1cuda10.1_amd64.deb_.zip

# 解压缩
$ unzip libcudnn7_7.6.5.32-1cuda10.1_amd64.deb_.zip

$ unzip libcudnn7-dev_7.6.5.32-1cuda10.1_amd64.deb_.zip

$ unzip libcudnn7-doc_7.6.5.32-1cuda10.1_amd64.deb_.zip

# 按照顺序安装
$ sudo dpkg -i libcudnn7_7.6.5.32-1+cuda10.1_amd64.deb

$ sudo dpkg -i libcudnn7-dev_7.6.5.32-1+cuda10.1_amd64.deb

$ sudo dpkg -i libcudnn7-doc_7.6.5.32-1+cuda10.1_amd64.deb

$ wget https://www.mobibrw.com/wp-content/uploads/2019/11/libcudnn7_7.6.5.32-1cuda10.1_amd64.deb_.zip

$ wget https://www.mobibrw.com/wp-content/uploads/2019/11/libcudnn7-dev_7.6.5.32-1cuda10.1_amd64.deb_.zip

$ wget https://www.mobibrw.com/wp-content/uploads/2019/11/libcudnn7-doc_7.6.5.32-1cuda10.1_amd64.deb_.zip

# 解压缩

$ unzip libcudnn7_7.6.5.32-1cuda10.1_amd64.deb_.zip

$ unzip libcudnn7-dev_7.6.5.32-1cuda10.1_amd64.deb_.zip

$ unzip libcudnn7-doc_7.6.5.32-1cuda10.1_amd64.deb_.zip

# 按照顺序安装

$ sudo dpkg -i libcudnn7_7.6.5.32-1+cuda10.1_amd64.deb

$ sudo dpkg -i libcudnn7-dev_7.6.5.32-1+cuda10.1_amd64.deb

$ sudo dpkg -i libcudnn7-doc_7.6.5.32-1+cuda10.1_amd64.deb

检测是否成功安装：

$ cp -r /usr/src/cudnn_samples_v7/ ~/

$ cd ~/cudnn_samples_v7/mnistCUDNN

$ make clean && make

$ ./mnistCUDNN

$ cp -r /usr/src/cudnn_samples_v7/ ~/

$ cd ~/cudnn_samples_v7/mnistCUDNN

$ make clean && make

$ ./mnistCUDNN

执行输出如下结果代表成功安装：

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