centos python java redis

查看进程id的路径

ll /proc/PID

centos7升级gcc版本到8

https://blog.csdn.net/csdn18740599042/article/details/108951385

centos python

wget https://www.python.org/ftp/python/3.8.5/Python-3.8.5.tgz
tar -zxvf  Python-3.8.5.tgz

./configure --prefix=/usr/local/python3 --with-ssl
./configure  --prefix=/usr/local/python3  --with-ssl
make && make install

# 查看当前python软连接
ll /usr/bin/ |grep python
# 删除python软连接
rm -rf /usr/bin/python
#添加python3的软链接 
ln -s /usr/local/python3/bin/python3 /usr/bin/python

rm -rf /usr/bin/pip
#添加 pip3 的软链接 
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip

# 更改yum 源
vi /usr/bin/yum 
把 #! /usr/bin/python 修改为 #! /usr/bin/python2 
vi /usr/libexec/urlgrabber-ext-down 
把 #! /usr/bin/python 修改为 #! /usr/bin/python2

Python安装报错：”ModuleNotFoundError:No module named _ctypes“ 的解决方案

 yum install libffi-devel -y

./configure --prefix=/usr/local/python3  --with-ssl

--enable-optimizations make时会有SystemError: <built-in function compile> returned NULL without setting an error。
在低版本的gcc版本中带有--enable-optimizations参数时会出现上面问题，gcc 8.1.0已经修复此问题;但不见是用使用此方法。

./configure --enable-optimizations --prefix=/usr/local/python3  --with-ssl

centos java

centos7 yum install java

yum list installed |grep java
yum -y remove #名称
yum -y list java*

yum install java-1.8.0-openjdk.x86_64  java-1.8.0-openjdk-devel.x86_64

cd /usr/lib/jvm/
vi /etc/profile

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.292.b10-1.el7_9.x86_64
export CLASSPATH=.:$JAVA_HOME/jre/lib/rt.jar:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin


source /etc/profile
echo $JAVA_HOME
echo $CLASSPATH
echo $PATH

查看Linux的java版本报错:/lib/ld-linux.so.2: bad ELF interpreter: 没有那个文件或目录

yum install glibc.i686

pip requirements

生成requirements.txt文件
pip freeze > requirements.txt

安装requirements.txt依赖
pip install -r requirements.txt

python Icecream

Icecream 替换print

mac Error: Cannot find module '../lib/utils/unsupported.js'

重新下载安装 node

redis 查看所有的key

redis> keys *

# 查看redis hash  所有的值
 hgetall  demos
 

centos 7安装redis

https://www.cnblogs.com/heqiuyong/p/10463334.html

安装redis，执行make test时遇到You need tcl 8.5 or newer in order to run the Redis test

mac 查看redis.conf
vim /usr/local/etc/redis.conf

后台启动
daemonize yes

设置密码
requirepass ****

redis-server --version
redis-server -v

centos 源码安装java

wget  https://download.oracle.com/otn/java/jdk/8u281-b09/89d678f2be164786b292527658ca1605/jdk-8u281-linux-i586.tar.gz

mkdir /usr/local/java/
tar -zxvf jdk-8u231-linux-x64.tar.gz -C /usr/local/java/
cd /usr/local/java && ll

vim /etc/profile

export JAVA_HOME=/usr/local/java/jdk1.8.0_231
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

source /etc/profile

java -version

参考

centos7安装JDK