Ubuntu 使用中遇到的各类bugs，备忘

1. conda: Rolling back transaction: done OSError(13, ‘Permission denied’)
   
   一定得记录一下这个找了将近两个小时的bug 的正确处理姿势：
   （机会在把google的各条搜索结果都变为深蓝色之后，finally……）
   
   在记录一下这个出处，十分奈斯的小哥哥：
   https://github.com/conda/conda/issues/3448

好了！该去干正事了！
2. FutureWarning: Conversion of the second argument of issubdtype from float to np.floating is deprecated. In future, it will be treated as np.float64 == np.dtype(float).type.
Solution:

pip install h5py==2.8.0rc1

记录出处：https://github.com/h5py/h5py/issues/974
3. QXcbConnection: Could not connect to display
[1] 21183 abort (core dumped) ipython

Solution:

In [1]: import os
In [2]: os.environ['QT_QPA_PLATFORM']='offscreen'
In [3]: import matplotlib.pyplot

记录出处：https://github.com/ContinuumIO/anaconda-issues/issues/1806
4. 在ipython下import caffe 时报错：ImportError: libcudnn.so.7: cannot open shared object file: No such file or directory
Solution：安装cudnn 7.x
命令：conda install -c anaconda cudnn

1. 又重装了一遍caffe（别提有多扎心了……），在make all 阶段报错

Makefile:625: recipe for target '.build_release/tools/upgrade_net_proto_binary.bin' failed
make: *** [.build_release/tools/upgrade_net_proto_binary.bin] Error 1

我按照https://github.com/BVLC/caffe/issues/2348里的方法，先cmake .，再make all，不再报错。
7. 又有报错，里面有大量的//usr/lib/libgdal.so.20: undefined reference to TIFFMergeFieldInfo@LIBTIFF_4.0' 之类的错误。
Solution：安装libgeotiff-dev: sudo apt-get install libgeotiff-dev