月份：2018年9月
平面及其方程
ERRORs
1.安装scrapy或者Twisted：fatal error: Python.h: 没有那个文件或目录
a:安装python3
2.python3.6的安装（3.7.x没有pip）
a:https://blog.csdn.net/libb_1122/article/details/78968462
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并增加对pip3的软链接 ln -s /usr/local/bin/pip3.6 /usr/bin/pip |
3.yum安装软件时出现：Yum：[Errno 5] [Errno 2] No such file or directory
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有两个配置文件需要修改 /usr/bin/yum /usr/libexec/urlgrabber-ext-down 分别将文件开头的声明路径改正确，改回2.7的版本 #! /usr/bin/env python2.7 |
4.centos安装 python-dev包提示No package python-dev available
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修改为： yum install python-devel |
5.Delta RPMs disabled because /usr/bin/applydeltarpm not installed
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yum provides '*applydeltarpm' #找出哪些包包含‘*applydeltarpm’ yum install deltarpm； |
6.tar (child): lbzip2: Cannot exec: No such file or directory
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yum -y install bzip2 |
7.Could not find a version that satisfies the requirement Twisted>=13.1.0 (from Scrapy) (from versions: )
No matching distribution found for Twisted>=13.1.0 (from Scrapy)
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wget https://pypi.python.org/packages/source/T/Twisted/Twisted-18.7.0.tar.bz2 tar -xjvf Twisted-15.2.1.tar.bz2 cd Twisted-15.2.1 python3 setup.py install（python根据版本更换） |
8.软硬链接
https://www.cnblogs.com/songgj/p/9115954.html
9.ModuleNotFoundError: No module named ‘twisted.persisted’
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当前twisted的版本不支持当前python版本（3.x） pip uninstall twisted （卸载当前的tuisted版本） 下载最新的版本参考第7点 https://twistedmatrix.com/Releases/Twisted/18.7/Twisted-18.7.0.tar.bz2 wget https://pypi.python.org/packages/source/T/Twisted/Twisted-18.7.0.tar.bz2 |
10.python3的安装：No module named _ssl
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#修改Setup文件，去掉下面几行前面的注释 vi /python文件存储目录/Python-3.6.5/Modules/Setup.dist #修改结果如下： # Socket module helper for socket(2) _socket socketmodule.c # Socket module helper for SSL support; you must comment out the other # socket line above, and possibly edit the SSL variable: SSL=/usr/local/ssl _ssl _ssl.c \ -DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \ -L$(SSL)/lib -lssl -lcrypto #然后重新编译安装 make make install ref：https://blog.csdn.net/chief_victo/article/details/80425431 |
11.ImportError: No module named ‘_sqlite3
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yum install sqlite-devel cd /文件存放目录/Python3.x #重新编译安装 ./configure make make install ref：https://blog.csdn.net/yemazhuxing/article/details/80462112 |
centos7 安装docker
一、教程
官方doc：https://docs.docker.com/install/linux/docker-ce/centos/#upgrade-docker-ce
译：http://www.kevinli.com.cn/archives/28
二、error
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Error: Package: docker-ce-17.03.0.ce-1.el7.centos.x86_64 (/docker-ce-17.03.0.ce-1.el7.centos.x86_64) Requires: docker-ce-selinux >= 17.03.0.ce-1.el7.centos |
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要先安装 docker-ce-selinux >= 17.03.0.ce-1.el7.centos yum install https://download.docker.com/linux/centos/7/x86_64/stable/Packages/docker-ce-selinux-17.03.0.ce-1.el7.centos.noarch.rpm |
查询linux发行版本和内核版本
一、发行版本（release）
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进入etc目录查看：system-release或者redhat-release或者centos-release 查看存在在的上述文件; ls -al或者ll会给出软连接的指向： system-release -> centos-release redhat-release -> centos-release（说明系统为centos） ############ [root@izwz9ie21woahhphb55nscz etc]# cat system-release CentOS Linux release 7.3.1611 (Core) [root@izwz9ie21woahhphb55nscz etc]# cat redhat-release CentOS Linux release 7.3.1611 (Core) [root@izwz9ie21woahhphb55nscz etc]# cat centos-release CentOS Linux releas#e 7.3.1611 (Core) ############ |
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lsb_release -a #适用于所有版本(Amazon Linux失效) root@izwz9ie21woahhphb55nscz WeChat]# lsb_release -a LSB Version: :core-4.1-amd64:core-4.1-noarch Distributor ID: CentOS Description: CentOS Linux release 7.3.1611 (Core) Release: 7.3.1611 Codename: Core |
二、内核版本（kernel）—–也可查32位还是64位
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cat /proc/version ############## [root@izwz9ie21woahhphb55nscz etc]# cat /proc/version Linux version 3.10.0-514.26.2.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Tue Jul 4 15:04:05 UTC 2017 ############## |
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uname -a ############## [root@izwz9ie21woahhphb55nscz etc]# uname -a Linux izwz9ie21woahhphb55nscz 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux ############## |