后端开发实战

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linux 初始化 ​

shell
#!/bin/bash
mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo_bak 
curl -o  /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo 
yum clean all
yum makecache
yum repolist
yum install -t wget
yum install -y  rsync
yum install -y  vim

rsync ​

shell
rsync -r -u /opt/hadoop/           root@192.168.83.140:/opt/hadoop/
rsync -r -u /opt/jdk1.8.0_201/           root@192.168.83.140:/opt/jdk1.8.0_201/
scp -r env.sh  root@192.168.83.140:/opt/
source env.sh

rsync -av  /opt/hadoop/           root@192.168.83.140:/opt/hadoop/
touch nginx-{01..10}.txt

rocky linux ​

sed -e 's|^mirrorlist=|#mirrorlist=|g' \
    -e 's|^#baseurl=http://dl.rockylinux.org/$contentdir|baseurl=https://mirrors.aliyun.com/rockylinux|g' \
    -i.bak \
     /etc/yum.repos.d/rocky*.repo
     
dnf makecache

磁盘管理 ​

sh
a   toggle a bootable flag
   b   edit bsd disklabel
   c   toggle the dos compatibility flag
   d   delete a partition
   g   create a new empty GPT partition table
   G   create an IRIX (SGI) partition table
   l   list known partition types
   m   print this menu
   n   add a new partition
   o   create a new empty DOS partition table
   p   print the partition table
   q   quit without saving changes
   s   create a new empty Sun disklabel
   t   change a partition's system id
   u   change display/entry units
   v   verify the partition table
   w   write table to disk and exit
   x   extra functionality (experts only)
shell
lsblk
fdisk -l


centos  添加新硬盘 并格式化 建立分区 挂载
https://www.cnblogs.com/studyjobs/p/18168763

##在虚拟机添加硬盘后执行操作
lsblk
fdisk -l 
## 新硬盘是 /dev/sdb
## 分区  只见一个主分区
fdisk /dev/sdb
##  输入p 创建主分区 两次回车 创建一个主分区
p
## 保存
wq
##  查看磁盘分区
lsblk
 sdb
    sdb1
##  格式化  xfs 分区
mkfs.xfs /dev/sdb1
## 创建目录 
mkdir -p  /mnt/data
##  把硬盘挂载到指定的挂载点上   
mount /dev/sdb1   /mnt/data
## 卸载 分区
umount /dev/sdb1 
## 查询硬盘分区 
df -h
## fstab 追加分区挂载
vim /etc/fstab
# 之间使用 空格 或者 tab 进行隔开即可 
/dev/sdb1	/mnt/data	xfs	defaults	0	0

创建数据库 脚本 ​

sh
#!/bin/bash
HOST="localhost"
PORT="3306"
USER="root"
PASSWORD="root"
dbName="test"

mysql_sh="mysql -u$USER -p$PASSWORD"
echo ${mysql_sh}

echo "create database test"
create_db_sql="create database IF NOT EXISTS ${dbName}"
echo ${create_db_sql}  | ${mysql_sh}   
if [ $? -ne 0 ]                                                                                #判断是否创建成功
then
 echo "create databases ${dbName} failed ..."
 exit 1
fi

echo "create table ${TABLENAME}"

服务启停 ​

sh
#!/bin/bash
port=8081
path='travelApp.jar'
pid=`ps -ef |grep $path |grep -v grep | awk  '{print $2}'`
if [[ $pid == "" ]];then
	echo "服务不存在" && exit 1
fi

kill -9 $pid && echo "服务已停止 pid=$pid"
sh
#!/bin/bash
port=8081
path='travelApp.jar'
pid=`ps -ef |grep $path |grep -v grep | awk  '{print $2}'`
if [[ $pid != "" ]];then
	echo "服务已存在" && exit 1
fi
nohup java -jar $path --server.servlet.context-path=/travelApp  > travelApp.log  2>&1  &
echo "服务启动成功 $!"

centos7 升级bash ​

sh
wget -v http://ftp.gnu.org/gnu/bash/bash-5.1.16.tar.gz
tar zxvf bash-5.1.16.tar.gz
cd bash-5.1.16/
./configure
make && make install
## 因为bash默认是安装在/usr/local/bin/目录下，所以需要创建一个链接到/bin/目录下，
#安装完毕后需要重启生效！
 mv /bin/bash /bin/bash.bak && ln -s /usr/local/bin/bash /bin/bash
#重新加载bash或者重新断开连接，重新远程登录即可完成bash版本升级。
exec $SHELL
/usr/local/bin/bash -version
/bin/bash --version
bash --version

bashtop ​

sh
## ubuntu 直接 使用 apt install bashtop

##  centos  需要先升级bash 以上
#下载bashtop 源码  bashtop-0.9.25.tar.gz
#解压并执行
make install

centos 配置 ssh 免密登录

shell
#  在当前机器下 执行命令 生成 私钥和公钥 ~/.ssh 目录下
ssh-keygen -t rsa 
#   执行如下命令 把公钥 放到 对应机器上的 ~/.ssh/authorized_keys 
ssh-copy-id 172.17.68.220
#  如此 两台机器两两配置

centos 连接慢 ​

sh
vim  /etc/ssh/sshd_config 
 # UseDNS 设置为no
 UseDNS no
 systemctl restart sshd

centos 安装 ansible ​

sh
yum -y install epel-release
yum -y install ansible

harbor 搭建 ​

sh

tar -zxvf  harbor-offline-installer-v2.11.1.tgz -C /opt
mv harbor.yml.tmpl  harbor.yml
vim harbor.yml
# 修改hostname为当前IP
# 注释https 相关
./install.sh
# 访问
ip+80(用户： admin/Harbor12345)
## 安装docker 的各个客户机都需操作
vim /etc/docker/daemon.json
{
   
     
 
  "insecure-registries":["192.168.229.134"]
}

systemctl daemon-reload
systemctl restart docker

docker login 192.168.229.134
# 输入harbor用户名及密码
#   打标签
docker tag nginx:latest 192.168.229.134/library/nginx:latest
#     推送至私服
docker push 192.168.229.134/library/nginx:latest