早上一個應用日誌打印報錯信息：
在應用上telnet端口和ping都沒有問題，爲什麼還獲取不到值呢。
先安裝一個redis客戶端進行測試：yum -y install redis
redis-cli -h 192.168.32.12 -p 6887
然後就報錯了：
(error) DENIED Redis is running in protected mode because protected mode is……
後來就查看配置發現redis.conf 該行也是註釋的：
# requirepass foobared
繼續排查發現和一個參數配置有關係：
鏈接redis 時只能通過本地localhost (127.0.0.1）這個來鏈接，而不能用網絡ip(192.168..)這個鏈接，問題然如果用網絡ip 鏈接會報以下的錯誤：
(error) DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the lookback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the --portected-mode no option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.
是說處於保護模式，只能本地鏈接，我們需要修改配置文件../redis.conf
1)打開配置文件把下面對應的註釋掉
# bind 127.0.0.1
2)Redis默認不是以守護進程的方式運行，可以通過該配置項修改，使用yes啓用守護進程，設置爲no
daemonize no
3)保護模式
protected-mode no
報錯處理：
一、
在對應配置conf文件中去掉註釋，把yes改爲no
#protected-mode yes
protected-mode no
重啓redis（注意有數據時慎重啓）
kill -9 進程號
redis-cli -h 192.168.32.12 -p 6887 shutdown
二、添加認證，設置密碼
# requirepass foobared
requirepass redis123456
驗證
再次用Java程序建立連接池，沒有報錯，且可以對redis server進行數據正常處理。程序報錯日誌不再顯示
問題解決
linux下查看redis是否正常運行
make
make PREFIX=/usr/local/redis install
mkdir /etc/redis/
cp redis.conf /etc/redis/
打開redis.conf文件修改daemonize yes即可在後臺運行
vim /etc/redis/redis.conf
使用配置文件啓動redis服務
./redis-server /etc/redis/redis.conf
如何查看redis服務正常啓動？
使用ps查看或netstat
ps aux | grep redis-server
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