Nexus-3-29.2-02 start not work

When I run the command line “./nexus run” everything is fine, but when I run"./nexus start"it doesn’t work, even if I switch to root, there is no output message,I have tried the following solution, but it doesn’t work.

System: CentOS Linux release 7.3.1611 (Core)
Linux Kernel: 3.10.0-514.26.2.el7.x86_64 x86_64 GNU/Linux

Like this:

<root@server bin>#./nexus start

WARNING: ************************************************************

WARNING: Detected execution as “root” user. This is NOT recommended!

WARNING: ************************************************************

Starting nexus

<root@server bin>#./nexus status

WARNING: ************************************************************

WARNING: Detected execution as “root” user. This is NOT recommended!

WARNING: ************************************************************

nexus is stopped.