尝试使用 Kubuntu 16.04 64 位版本安装 redis-server：
sudo apt install redis-server
但是在安装时收到此消息：
Setting up redis-server (2:3.0.7-1~dotdeb+6.1) ...
Job for redis-server.service failed because a timeout was exceeded. See "systemctl status redis-server.service" and "journalctl -xe" for details.
invoke-rc.d: initscript redis-server, action "start" failed.
dpkg: error processing package redis-server (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
redis-server
E: Sub-process /usr/bin/dpkg returned an error code (1)
尝试运行“journalctl -xe”并发现：
redis-server.service: PID file /var/run/redis/redis-server.pid not readable (yet?) after start-post: …