CentOS Python Java installations

cd dev
ls | grep sd
vmlinuz initrd=initrd.img inst.stage2=hd:LABEL=CentOS\x207\x20x86_64.check quiet
=> vmlinuz initrd=initrd.img inst.stage2=hd:/dev/sda4
ctrl + x

passwd root
useradd xxx
passwd xxx
usermod -g root xxx

cd /etc/sysconfig/network-scripts
vim /etc/sysconfig/network-scripts/ifcfg-ethX # ONBOOT=yes
service network restart # reboot

# vi ~/.ssh/know_hosts # delete existing RSA key accordingly
# yum install ssh
# service sshd start
chkconfig sshd on
vi /etc/ssh/sshd_config # Port 22 # PermitRootLogin yes
systemctl restart sshd # /etc/init.d/sshd start
ssh xxx@host_ip
# yum -y install wget # yes

# SSL
yum install openssl* -y
vi Module/Setup
ssl _ssl.c \
    -DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl \
    -L$(SSL)/lib -lssl -lcrypto
./configure
sudo make && make install

# yum -y install epel-release
# yum repolist
# yum -y install python37
# Python3 选了个老版本，应该是个稳定版
wget https://www.python.org/ftp/python/3.7.6/Python-3.7.6.tgz
yum install zlib-devel # 最好先装好 zlib-devel，不要删python2，否则yum用不了!
mkdir /home/python3 # 或者 /usr/local/python3
tar -zxvf Python-3.7.6.tgz
./configure
make && make install # rpm包的装发不如这个装法
# python = python3 # 把python指令指向python3
echo alias python=python3 >> ~/.bashrc
source ~/.bashrc
echo alias pip=pip3 >> ~/.bashrc
source ~/.bashrc
# 重启后要重新source，这里可以直接改软连接
# ln -s /home/python3/Python-3.7.6/bin/python3.7 /usr/bin/python3
# ln -s /home/python3/Python-3.7.6/bin/pip3.7 /usr/bin/pip3

# JDK 安装
wget https://download.oracle.com/otn/java/jdk/8u241-b07/1f5b5a70bf22433b84d0e960903adac8/jdk-8u241-linux-x64.tar.gz?AuthParam=1579597926_feb4b98c7a997f72e6005f67d40019e1"

wget --no-cookies --no-check-certificate --header \
"Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" \
https://download.oracle.com/otn/java/jdk/8u271-b09/61ae65e088624f5aaa0b1d2d801acb16/jdk-8u271-linux-x64.rpm?AuthParam=1608862951_6737a7f0616ff15cd0ceeb22a4768dc5"

wget --no-check-certificate --no-cookies --header \
"Cookie: oraclelicense=accept-securebackup-cookie" \
https://download.oracle.com/otn/java/jdk/8u271-b09/61ae65e088624f5aaa0b1d2d801acb16/jdk-8u271-linux-i586.tar.gz?AuthParam=1608862947_8da1a31b14f9e03c2a5671c566e1c100

# or just SCP/AFP/SMB upload downloaded JDK

tar -zxvf jdk-8u151-linux-x64.tar.gz
# JDK 配置
vi /etc/profile
set java environment
JAVA_HOME=/home/java      
JRE_HOME=/home/java     
CLASS_PATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
export JAVA_HOME JRE_HOME CLASS_PATH PATH
source /etc/profile