/usr/目录 usr是user的缩写，是曾经的HOME目录，然而现在已经被/home取代了，现在usr被称为是Unix System Resource，即Unix系统资源的缩写。...目录 描述 /usr/X11R6 存放X-Windows的目录； /usr/games 存放着XteamLinux自带的小游戏； /usr/doc Linux技术文档； /usr/include 用来存放...Linux下开发和编译应用程序所需要的头文件； /usr/lib 存放一些常用的动态链接共享库和静态档案库； /usr/man 帮助文档所在的目录； /usr/src Linux开放的源代码，就存在这个目录.../usr/lib/ /usr/bin/和/usr/sbin/中二进制文件的库。 /usr/sbin/ 非必要的系统二进制文件，例如：大量网络服务的守护进程。.../usr/share/ 体系结构无关（共享）数据。 /usr/src/ 源代码,例如:内核源代码及其头文件。 /usr/X11R6/ X Window系统版本 11, Release 6.
/usr/目录 usr是user的缩写，是曾经的HOME目录，然而现在已经被/home取代了，现在usr被称为是Unix System Resource，即Unix系统资源的缩写。.../usr/man 帮助文档所在的目录； /usr/.../usr/lib/ /usr/bin/和/usr/sbin/中二进制文件的库。.../usr/local/ 本地数据的第三层次，具体到本台主机。...原文链接:https://rumenz.com/rumenbiji/linux-usr-var.html
Linux 的软件安装目录是也是有讲究的，理解这一点，在对系统管理是有益的 /usr：系统级的目录，可以理解为C:/Windows/，/usr/lib理解为C:/Windows/System32。.../usr/src：系统级的源码目录。 /usr/local/src：用户级的源码目录。 /opt Here’s where optional stuff is put....It has the same structure as /usr....It is a good idea to leave /usr to your package manager and put any custom scripts and things into /usr...它和/usr目录具有相类似的目录结构。让软件包管理器来管理/usr目录，而把自定义的脚本(scripts)放到/usr/local目录下面，我想这应该是个不错的主意。
报错： which: no java in (/root/chengxu/maven/apache-maven-3.5.2/bin:/usr/local/sbin:/usr/local/bin:/usr.../sbin:/usr/bin:/root/chengxu/JDK/jdk1.8.0_191/bin:/root/chengxu/JDK/jdk1.8.0_191/jre/bin:/root/bin) could
usr/bin/env python #_*_ coding:utf-8 _*_ """ title:python 实现协同过滤算法基于用户与基于内容 """ import numpy as np import
nested exception is java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (USR_JXZX_DSJKF_MODEL.SYS_C00912833
文章目录 一、security 目录 二、sound 目录 三、tools 目录 四、usr 目录 五、virt 目录 一、security 目录 ---- security 目录中存储了 Linux...相关代码 ; 二、sound 目录 ---- sound 目录中存储了 声卡驱动 相关代码 ; 三、tools 目录 ---- tools 目录中存储了 与 Linux 内核交互 相关代码 ; 四、usr...目录 ---- usr 目录中存储了 用户打包 和 内核压缩 相关代码 ; 五、virt 目录 ---- virt 目录中存储了 kvm 虚拟化目录相关实现 相关代码 ;
超短距离（USR）接口在2.5D封装技术上的重要性日益提高，已导致各种电气定义和电路实现。...台积电最近介绍了其IP开发团队采用的方法，该方法用于并行总线，时钟转发的USR接口，以优化功率/性能/区域，即“ LIPINCON”。...简介 异构，多芯片2.5D封装技术的最新进展导致了一种新型的接口，即超短距离（USR）接口，其电气特性与传统的印刷电路板走线有很大不同。...然而，到目前为止，这些USR接口所采用的电路和物理实现方法相当多样。...台积电的演讲提到，他们的一些客户已经为USR接口设计开发了自己的IP实现。一个示例显示了一个非常低的摆幅（0.2V）电学定义，它是“以地面为参考”的（例如，信号摆幅高于和低于地面）。
/usr/bin/python /usr/bin/easy_install-2.7:#!/usr/bin/python /usr/bin/firewall-cmd:#!.../usr/bin/python2.7 -Es /usr/bin/firewall-offline-cmd:#!/usr/bin/python2.7 -Es /usr/bin/msghack:#!.../usr/bin/python2.7 /usr/bin/pip:#!/usr/bin/python /usr/bin/pip2:#!/usr/bin/python /usr/bin/pip2.7:#!.../usr/bin/python /usr/bin/pydoc:#!/usr/bin/python2.7 /usr/bin/systemd-sysv-convert:#!.../usr/bin/python2.7 /usr/bin/urlgrabber:#!/usr/bin/python2.7 -t /usr/bin/wheel:#!
usr/local/python3/bin' >> ~/.bashrc 1 echo 'export PATH=#PATH:/usr/local/python3/bin' >> ~/.bashrc...替换python2 12 12rm /usr/bin/pythonln -sv /usr/local/bin/python3.5 /usr/bin/python 12 rm /usr/bin/pythonln... -sv /usr/local/bin/python3.5 /usr/bin/python 12 rm /usr/bin/pythonln -sv /usr/local/bin/python3.5 ...更新yum配置 1 1ll /usr/bin | grep python 1 ll /usr/bin | grep python 1 ll /usr/bin | grep python (这里的/usr.../usr/bin/python改为#!/usr/bin/python2.6,保存退出，完成python3的安装 7.运行python ?
ll -tr /usr/local/bin/python* /usr/local/bin/python2.7 /usr/local/bin/python2.7-config /usr/local/bin...ll -tr /usr/bin/python* /usr/bin/python2.6-config /usr/bin/python2.6 /usr/bin/python /usr/bin/python2...ln -s /usr/local/bin/python /usr/bin/python ln -s /usr/local/bin/python-config /usr/bin/python-config.../usr/bin/python* /usr/bin/python2.6-config /usr/bin/python2.6 /usr/bin/python.old /usr/bin/python2...-> python /usr/bin/python -> /usr/local/bin/python /usr/bin/python-config -> /usr/local/bin/python-config
1.首先，查看系统现在的python2的位置的安装位置：[root@aiot189 Python-3.7.5]# whereis python2python2: /usr/bin/python2 /usr.../bin/python2.7 /usr/bin/python2.7-config /usr/lib/python2.7 /usr/lib64/python2.7 /usr/include/python2.7.../usr/share/man/man1/python2.1.gz可以知道我们的python在 /usr/bin目录中[root@aiot189 Python-3.7.5]# cd /usr/bin[root.../usr/bin/python修改为#! /usr/bin/python2 vi /usr/libexec/urlgrabber-ext-down把#! /usr/bin/python 修改为#!.../local/python3/lib/python37.zip', '/usr/local/python3/lib/python3.7', '/usr/local/python3/lib/python3.7
pip # alternatives --install /usr/bin/python python /usr/bin/python2.7 1 # alternatives --install /usr.../bin/python python /usr/bin/python3.6 2 # mv /usr/bin/pip /usr/bin/pip.bak //原有的pip不是软连接，先把它干掉 # alternatives...link currently points to /usr/bin/python3.6 /usr/bin/python2.7 - priority 1 /usr/bin/python3.6 - priority.../usr/bin/python 都改为#!.../usr/bin/python2.7 这样在切换到Python3.6以后也可以正常使用yum了 5.firewall-cmd也需要手工设置一下 # vim /usr/bin/firewall-cmd
00:00:01 /usr/bin/python /usr/bin/salt-master 3 root 1415 1139 0 10:25 ?...00:00:00 /usr/bin/python /usr/bin/salt-master 4 root 1541 1139 0 10:25 ?...00:00:00 /usr/bin/python /usr/bin/salt-master 5 root 1544 1139 0 10:25 ?...00:00:00 /usr/bin/python /usr/bin/salt-master 6 root 1553 1139 0 10:25 ?...00:00:00 /usr/bin/python /usr/bin/salt-master MWorker-1
python: /usr/bin/python2.7 /usr/bin/python3.7m /usr/bin/python2.7-config /usr/bin/python3.7-config.../usr/bin/python3.7 /usr/bin/python3.7m-config /usr/bin/python /usr/lib/python2.7 /usr/lib/python3.7.../usr/include/python2.7 /usr/include/python3.7m / usr/include/python3.7 /usr/share/python /usr.../usr/bin/python3.7m /usr/bin/python3m /usr/bin/python2 /usr/bin/python2-config.../usr/bin/python3.7 /usr/bin/python3.7m-config /usr/bin/python3m-config /usr/bin/python2.7 /
/configure --prefix=/usr/local # make # make altinstall 5、更改/usr/bin/python链接 # cd/usr/bin # mv python...python.backup \\备份python # ln -s/usr/local/bin/python3.6 /usr/bin/python \\这里是python3.6，不是python3.6.2...\\ # ln -s/usr/local/bin/python3.6 /usr/bin/python3 \\这里是python3.6，不是python3.6.2\\ 6、更改yum脚本的python.../usr/bin/python 改为 # !.../usr/bin/python 改为 # !/usr/bin/python2 9、启动Python3.6 # python3.6 版本号为Python3.6.2 ?
此时已完成新版本的安装，但由于老版本还在系统中，所以需要将原来/usr/bin/python链接改为新的连接： a.先修改老的连接，执行：mv /usr/bin/python /usr/bin/python_bak...b.再建立新连接：ln -s /usr/local/python3.5/bin/python3.5 /usr/bin/python c.设置环境变量PATH=$PATH:/usr/local/python3.5.../configure --prefix=/usr/local/python$version make && make install mv /usr/bin/python /usr/bin/python_bak...ln -s /usr/local/python$version/bin/python$main /usr/bin/python PATH=$PATH:/usr/local/python$version.../ python --version sed -i "1s#/usr/bin/python#/usr/bin/python2.6#" /usr/bin/yum cd ~ rm -rf Python-$version.tgz
python-opencv: /usr/lib/python2.7/dist-packages/cv.py python-pyavm: /usr/lib/python2.7/dist-packages...python-scapy: /usr/share/pyshared/scapy/sendrecv.py python3-kivy: /usr/lib/python3/dist-packages/kivy...: /usr/share/doc/python-opencv/changelog.Debian.gz python-opencv: /usr/share/doc/python-opencv/copyright...python-opencv-apps: /usr/lib/python2.7/dist-packages/opencv_apps/__init__.py python-opencv-apps: /usr...: /usr/lib/python2.7/dist-packages/opencv_apps/msg/_FlowArray.py python-opencv-apps: /usr/lib/python2.7
/configure –prefix=/usr/local/python3.7.1，则可执行文件放在/usr /local/python3.7.1/bin，库文件放在/usr/local/python3.7.1.../python 步骤3：由于python3.7是自己安装的，不在/usr/bin下，而在usr/local/bin或者/usr/local/python3.7.1/bin下（取决于前面执行的..../configure，则： mv /usr/bin/python /usr/bin/python.bak ln -s /usr/local/bin/python3 /usr/bin/python mv.../configure –prefix=/usr/local/python3.7.1，则为： mv /usr/bin/python /usr/bin/python.bak ln -s /usr/local.../python3.7.1/bin/python3.7 /usr/bin/python mv /usr/bin/pip /usr/bin/pip.bak ln -s /usr/local/python3.7.1
添加软连接#添加python3的软链接 ln -s /usr/local/python3/bin/python3.8 /usr/bin/python3 #添加 pip3 的软链接 ln -s /usr/...local/python3/bin/pip3.8 /usr/bin/pip3#检查[root@racknerd ~]# ll /usr/bin/python3 /usr/bin/pip3lrwxrwxrwx...Mar 23 10:25 /usr/bin/python3 -> /usr/local/python3/bin/python3.8#升级pip3pip3 install --upgrade pipSH添加好了.../usr/bin/python 修改为 #!/usr/bin/python2vi /usr/libexec/urlgrabber-ext-down 把 #!/usr/bin/python 修改为 #!.../usr/bin/python2
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