# 全局命令
## 列出所有的key
```js
keys *
```
注意使用，太多key时会导致卡顿，占用内存

![image.png](/static/img/dbdeed471c24bbe8dceb051cf1c3894c.image.webp)

## 判断key是否存在

```js
exists set1
```

![image.png](/static/img/24899aa3cb6652d89c0b0bc28e20135b.image.webp)


## 给key设置过期时间

```js
expire set1 20
```

![image.png](/static/img/ed8a4353c636e73a01f95e7f63ad1f61.image.webp)
## 取消过期时间

```js
persist set1
```

## 切换数据库

```js
select 0
```

![image.png](/static/img/0ccde8726b873a7438d92b47c5610620.image.webp)

## 移动key到别的数据库

```js
move set1 1
```
## 随机返回一个key

```js
randomkey
```
## 给key改名

```js
rename set1 newset1
```
## 打印信息

```js
echo message
```
## 查看key的数量

```js
dbsize
```
## 查看redis数据库信息

```js
info
```
## 查看所有redis的配置信息

```js
config get *
```
## 清空当前数据库

```js
flushdb
```
## 清空所有数据库

```js
flushall
```

7.redis命令-全局命令

# 一、先升级SSL
## 下载好最新的SSL安装包，然后解压

```js
tar -xzf openssl-3.5.2.tar.gz
```
## 进入目录
```js
cd openssl-3.5.2
```
## 指定位置执行
```js
./config --prefix=/usr/local/openssl-3.5.2 --openssldir=/usr/local/openssl-3.5.2
```
## 编译安装

```js
make
```

```js
make install
```
## 后续配置

```js
echo 'export PATH=/usr/local/openssl-3.5.2/bin:$PATH' >> ~/.bashrc
```

```js
echo 'export LD_LIBRARY_PATH=/usr/local/openssl-3.5.2/lib64:$LD_LIBRARY_PATH' >> ~/.bashrc
```

```js
source ~/.bashrc
```
## 验证是否成功
```js
/usr/local/openssl-3.5.2/bin/openssl version
```
## 如果报错，安装后再重新走一次

```js
# CentOS/RHEL系统
sudo yum install perl-IPC-Cmd perl-Text-Template

# Ubuntu/Debian系统
sudo apt-get install libipc-cmd-perl libtext-template-perl
```

# 二、升级SSH
## 由于之前是7.4现在升级成9.9，需要3.0版本以上的SSL
连接到最新版本的SSL

```js
find / -name libssl3.so
```
```js
ln -sf /usr/local/openssl-3.5.2/lib64/libssl.so.3 /usr/lib64/
ln -sf /usr/local/openssl-3.5.2/lib64/libcrypto.so.3 /usr/lib64/
```
## 刷新缓存

```js
ldconfig
```
## 环境变量配置

```js
export LD_LIBRARY_PATH=/usr/lib64:$LD_LIBRARY_PATH
echo 'export LD_LIBRARY_PATH=/usr/lib64:$LD_LIBRARY_PATH' >> ~/.bashrc
source ~/.bashrc
```
## 下载好openSSH安装包后，解压

```js
tar -zxvf openssh-9.9p2.tar.gz
```

```js
cd openssh-9.9p2
```
## 指向SSL的路径执行

```js
./configure --with-ssl-dir=/usr/lib64 --prefix=/usr/local/openssl
```
## 编译 安装

```js
make
```

```js
make install
```
## 最后重启测试，ssh -V查看

```js
systemctl restart sshd
systemctl status sshd
```

Open SSH和Open SSL升级

# 一、命令
## 查看全部元素有几个

```js
zcard yuwen
```

## 插入zset元素

```js
zadd yuwen 99 xiaoming
```

![image.png](/static/img/0f248df98c95fa69dbf55c56613f3fa4.image.webp)

## 进行排序查看
从小到大
```js
zrange yuwen 0 -1 withscores
```

![image.png](/static/img/36c1f91e35a80ab36bfa5cadf1979e51.image.webp)

从大到小

```js
ZREVRANGE yuwen 0 -1 withscores
```
![](http://songxuan.vip:81/static/img/19c12c344d3c2e1d59e747bab44b34ee.image.webp)

## 给zset元素加分

```js
zincrby yuwen 100 xiaomao
```

![image.png](/static/img/45a0f89c7cb1369e07a557edeeda00ad.image.webp)


## 查看某个元素排序
正序排第几

```js
zrank yuwen xiaomao
```
0-1-2-3

![image.png](/static/img/d672a5e165dc2634ba155836171a0a90.image.webp)


倒序排第几

```js
zrevrank yuwen xiaomao
```

![image.png](/static/img/5f989ed726b988743f560ef36bb1d1ad.image.webp)

## 查找范围之间的元素（正序）
查找分数96至99成员
```js
ZRANGEBYSCORE yuwen 96 99 WITHSCORES
```

![image.png](/static/img/48fc17d84e4e497b4f75ba3b59119988.image.webp)

## 查找范围之间的元素（倒序）
查找分数90至99成员
```js
ZREVRANGEBYSCORE yuwen 99 90 WITHSCORES
```

![image.png](/static/img/0e1d1b26c2f5889058c810f9b224f08f.image.webp)


## 删除某个元素

```js
zrem yuwen xiaoming
```
其他不常用命令
![image.png](/static/img/1863502112ef44b76644e6d386681fba.image.webp)

# 二、应用场景

![image.png](/static/img/964bab05b3fc4bb488b05f0cbae051b3.image.webp)


6.redis命令-ZSet

# set命令
## 往set插入数据

```js
sadd myset 3 4
```

![image.png](/static/img/40544099221566aca56137ef830a1049.image.webp)

## 遍历所有的元素


```js
smembers myset
```
遍历出来是无序的，按照哈希排序

![image.png](/static/img/1512229aef1a82f0aef2b1bf94e6d726.image.webp)


## 删除集合其中一个指定的元素


```js
srem myset 1
```
![image.png](/static/img/f116327f087589c0ba698645b4fb2bc5.image.webp)


## 随机弹出一个元素，并删除

```js
spop myset 1
```

![image.png](/static/img/1f3dce760ce4caa537dc12f889b0230e.image.webp)

## （差集）返回特有的元素
差集就key1跟key2对比，返回key1没有的值
```js
sdiff set1 set2
```
![](http://songxuan.vip/static/img/22ca2c4b8c2a87263552fcf56b7c9c64.image.webp)

## 交集
交集就是key1和key2都有的值
```js
sinter set1 set2
```

![image.png](/static/img/bfd7eb47d97f300b2739275ebfc97509.image.webp)

## 并集
并集就是两个key集进行集合，重复的剔除
```js
sunion set1 set2
```

![image.png](/static/img/c6d1385bdec5aeb612de50f49faafd1a.image.webp)


# 应用场景

![image.png](/static/img/abe9cd9a9622520fe4631869420aecfa.image.webp)

5.redis命令-Set

# 一、命令
## 从key的右边插入list的value

```js
rpush shuzi 1 2 3 4 5
```

![image.png](/static/img/0fab74194c7325885ad55510ff11ab11.image.webp)

![image.png](/static/img/9f7a6451aeaca4f8c3ce56f1faf76f62.image.webp)

## 从key的左边列出list的value

```js
lrange shuzi 0 5
```
```js
#不管列表有多少个都列出来
lrange shuzi 0 -1
```
![image.png](/static/img/96c87e7877ee3da76fd5f67de00b114b.image.webp)

## 从key的左边边插入list的value

```js
lpush shuzi -3 -2 -1
```

![image.png](/static/img/6448b4c468e925fb972d42cc90c163f0.image.webp)

## 从list列表中删除最左边的value

```js
lpop shuzi
```

![image.png](/static/img/5c42c03a9d751fb4e4774791fecacad0.image.webp)
## 从list列表中删除最右边的value

```js
rpop shuzi
```

![image.png](/static/img/7f945e19277b7fe768cc9865df7c82ee.image.webp)

## 获取list列表的长度
```js
llen shuzi
```

![image.png](/static/img/afcaf6b11c597e294b06c4377b53f64c.image.webp)

## 从list某个值前面插入
我从1前面插入-1
```js
linsert shuzi before 1 -1
```

![image.png](/static/img/d9f1546f5011ed2453584c4a33d0df23.image.webp)

## 从list某个值后面插入
从5后面插入6
```js
 linsert shuzi  after 5 6
```

![image.png](/static/img/51df8bbf9ec2d1ad8489fdc74de3362c.image.webp)

## 把列表中0位置的更换成0，前是换的位置，后面是换的值
```js
lset shuzi 0 0
```

![image.png](/static/img/823a857b7568378f81057d31497f24ca.image.webp)


## 把列表中0位置的1值删除
```js
lrem shuzi 0 1
```


![image.png](/static/img/562d39bdf65bf56789488bbc0371d30e.image.webp)

## 显示2至3位置 的值

```js
LRANGE shuzi 2  3
```

![image.png](/static/img/c34d4c5b8df0d0e551a617e9add15e40.image.webp)


## 显示3位置的值

```js
lindex shuzi 3
```

![image.png](/static/img/b6d1fa2ed1282d39603a35c73757062b.image.webp)



# 应用场景

![image.png](/static/img/59bccac73c69ddf90226c7f13a2c8b5a.image.webp)