重启redis服务时报错：Failed to start redis.service: Unit not found ...

重启redis服务时报错：Failed to start redis.service: Unit not found

redis共同安全修改了bind和auth设置，重启的时候报错了，试了很多方法，最后才通过日志办理了
1 重新加载systemd 设置并启动：
sudo systemctl daemon-reload
sudo systemctl start redis

1. > sudo systemctl daemon-reload
2. > sudo systemctl start redis
4. Failed to start redis.service: Unit not found.

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2 检察当前redis状态
sudo systemctl status redis

1. > sudo systemctl status redis
3. ● redis.service - Redis persistent key-value database
4.    Loaded: loaded (/usr/lib/systemd/system/redis.service; disabled; vendor preset: disabled)
5.   Drop-In: /etc/systemd/system/redis.service.d
6.            └─limit.conf
7.    Active: failed (Result: exit-code) since Thu 2024-08-08 18:01:26 CST; 16h ago
8.   Process: 2375 ExecStart=/usr/bin/redis-server /etc/redis.conf --supervised systemd (code=exited, status=1/FAILURE)
9. Main PID: 2375 (code=exited, status=1/FAILURE)
11. Aug 08 18:01:26 linux.bcc-bdbl.com systemd[1]: Starting Redis persistent key-value database...
12. Aug 08 18:01:26 linux.bcc-bdbl.com systemd[1]: Started Redis persistent key-value database.
13. Aug 08 18:01:26 linux.bcc-bdbl.com systemd[1]: redis.service: main process exited, code=exited, status=1/FAILURE
14. Aug 08 18:01:26 linux.bcc-bdbl.com systemd[1]: Unit redis.service entered failed state.
15. Aug 08 18:01:26 linux.bcc-bdbl.com systemd[1]: redis.service failed.

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3 发现是失败的，接着看下日志
cat /var/log/redis/redis.log

1. > cat /var/log/redis/redis.log
3. 25420:C 08 Aug 17:53:45.282 * supervised by systemd, will signal readiness
4. 25420:M 08 Aug 17:53:45.283 # Creating Server TCP listening socket 127.0.0.1:6379: bind: Address already in use
5. 2101:M 08 Aug 18:01:11.325 # Creating Server TCP listening socket 127.0.0.1:6379: bind: Address already in use
6. 2375:C 08 Aug 18:01:26.974 * supervised by systemd, will signal readiness
7. 2375:M 08 Aug 18:01:26.975 # Creating Server TCP listening socket 127.0.0.1:6379: bind: Address already in use

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错误信息 “Creating Server TCP listening socket 127.0.0.1:6379: bind: Address already in use” 表明 Redis 试图绑定到本地地址 127.0.0.1:6379，但该端口已经被其他历程占用。可以按照以下步调来办理这个问题：

1. > sudo lsof -i :6379
3. COMMAND    PID USER   FD   TYPE    DEVICE SIZE/OFF NODE NAME
4. redis-ser 2407 root    6u  IPv4 391104235      0t0  TCP *:6379 (LISTEN)
7. > sudo kill 2407

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杀掉原历程 再次重启并观察状态

1. > sudo systemctl daemon-reload
2. > sudo systemctl start redis
3. > sudo systemctl status redis

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检察状态

1. ● redis.service - Redis persistent key-value database
2.    Loaded: loaded (/usr/lib/systemd/system/redis.service; disabled; vendor preset: disabled)
3.   Drop-In: /etc/systemd/system/redis.service.d
4.            └─limit.conf
5.    Active: active (running) since Fri 2024-08-09 10:16:07 CST; 8s ago
6. Main PID: 21028 (redis-server)
7.    CGroup: /system.slice/redis.service
8.            └─21028 /usr/bin/redis-server 127.0.0.1:6379
10. Aug 09 10:16:07 linux.bcc-bdbl.com systemd[1]: Starting Redis persistent key-value database...
11. Aug 09 10:16:07 linux.bcc-bdbl.com systemd[1]: Started Redis persistent key-value database.

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乐成了！
在Linux体系中利用nano文本编辑器时，保存文件并退出操作步调
1 保存：按下 Ctrl + O（即 Control 键和字母O键同时按）
2 确认文件名：如果不需要改变文件名，按 Enter 键确认
3 退出：按下 Ctrl + X（即 Control 键和字母X键同时按）

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