解决开启redis失败：/var/run/redis_6379.pid exists, process is already running or crashed问题

问题1：启动redis失败

[[email protected] ~]# systemctl start redis_6379
[[email protected] ~]# systemctl status redis_6379

[[email protected] ~]# netstat -tnlp

解决方案：

1.根据提示信息删除pid文件

[[email protected] ~]# rm -rf /var/run/redis_6379.pid

2.删除dump.rdb（内存快照）文件

[[email protected] ~]# cd /var/lib/redis/6379
[[email protected] 6379]# ls
dump.rdb
[[email protected] 6379]# rm -f dump.rdb 

测试：

[[email protected] ~]# systemctl restart redis_6379
[[email protected]  ~]# netstat -antlp

问题2：启动redis成功，发现6379端口，但查看状态仍旧是exited

[[email protected] run]# systemctl start redis_6379
[[email protected] run]# systemctl status redis_6379

[[email protected] run]# netstat -antlp

解决方案：

直接用kill发信号杀死redis进程，再重新开启即可

[[email protected] run]# kill -9 2420
[[email protected] run]# netstat -antlp

[[email protected] run]# systemctl start redis_6379

测试：

[[email protected] run]# systemctl status redis_6379