DB Studio is showing the error
User management exception: Cannot connect to host 192.168.10.100:7210 [Connection timed out: connect], -813.
I already checked
> x_server stop
2016-01-21 18:03:48 8544 INF 12905 sdbgloballistener on port 7210 stopped
> x_server start
2016-01-21 18:03:52 6976 INF 12916 Found running XServer on port 7200
2016-01-21 18:03:52 6976 INF 13011 version 'U64/LIX86 7.8.02 Build 041-121-251-982'
2016-01-21 18:03:52 6976 INF 13010 installation sid - path:/sapdb/sid/db
2016-01-21 18:03:52 7584 INF 12798 NISERVER NI support started.
2016-01-21 18:03:52 96992 WNG 12453 NISSLSRV NISSL Init: SSL: Could not locate ticket file
2016-01-21 18:03:52 54048 INF 12903 sdbgloballistener on port 7210 started
> x_server
2016-01-21 18:07:34 91744 INF 12916 Found running XServer on port 7200
2016-01-21 18:07:34 91744 INF 13011 version 'U64/LIX86 7.8.02 Build 041-121-251-982'
2016-01-21 18:07:34 91744 INF 13010 installation sid - path: /sapdb/sid/db
2016-01-21 18:07:34 42528 INF 12916 Found running sdbgloballistener on port 7210
2016-01-21 18:07:34 42528 INF 13011 version 'U64/LIX86 7.8.02 Build 031-121-246-245'
> sdbregview -l
Installation: Global /sapdb/programs
Global Listener 7.8.02.31 valid 64 bit
Installation Compatibility 7.8.02.31 valid 64 bit
Installer 7.8.02.31 valid
SAP Utilities Compatibility 7.8.02.31 valid 64 bit
Installation: SID /sapdb/SID/db
Base 7.8.02.41 valid 64 bit
DB Analyzer 7.8.02.41 valid 64 bit
Database Kernel 7.8.02.41 valid 64 bit
Fastload API 7.8.02.41 valid 64 bit
JDBC 7.6.09.00 valid
Loader 7.8.02.41 valid 64 bit
Messages MSG 0.10269 valid
ODBC 7.8.02.41 valid 64 bit
Redist Python 7.8.02.41 valid 64 bit
SAP Utilities 7.8.02.41 valid 64 bit
SQLDBC 7.8.02.41 valid 64 bit
SQLDBC 76 7.6.06.27 valid 64 bit
SQLDBC 77 7.8.02.41 valid 64 bit
Server Utilities 7.8.02.41 valid 64 bit
Installation: CL_SID /sapdb/clients/SID
Base 7.8.02.41 valid 64 bit
Fastload API 7.8.02.41 valid 64 bit
JDBC 7.6.09.00 valid
Loader 7.8.02.41 valid 64 bit
Messages MSG 0.10269 valid
ODBC 7.8.02.41 valid 64 bit
Redist Python 7.8.02.41 valid 64 bit
SAP Utilities 7.8.02.41 valid 64 bit
SQLDBC 7.8.02.41 valid 64 bit
SQLDBC 76 7.6.06.27 valid 64 bit
SQLDBC 77 7.8.02.41 valid 64 bit
> xinstinfo SID
GlobalDataPath : /sapdb/data
GlobalProgramsPath : /sapdb/programs
PrivateDataPath : /sapdb/SID/data
Rundirectory : /sapdb/SID/data/wrk/SID
InstallationPath : /sapdb/SID/db
Kernelversion : KERNEL 7.8.02 BUILD 041-121-251-982
:~ # /sapdb/programs/bin/sdbverify
Checking installation "Global" (/sapdb/programs, 7.8.02.31)
Checking package Installer
Checking package SAP Utilities Compatibility
Checking package Global Listener
Checking package Installation Compatibility
Checking installation "Legacy" (/sapdb/programs, )
Checking installation "sid" (/sapdb/sid/db, 7.8.02.41)
Checking package Base
Checking package SQLDBC
Checking package SQLDBC 77
Checking package Fastload API
Checking package SQLDBC 76
Checking package SAP Utilities
Checking package Server Utilities
Checking package Database Kernel
Checking package Redist Python
Checking package Loader
Checking package ODBC
Checking package Messages
Checking package JDBC
Checking package DB Analyzer
Checking installation "CL_sid" (/sapdb/clients/sid, 7.8.02.41)
Checking package Base
Checking package SQLDBC
Checking package SQLDBC 77
Checking package Fastload API
Checking package SQLDBC 76
Checking package SAP Utilities
Checking package Redist Python
Checking package Loader
Checking package ODBC
Checking package Messages
Checking package JDBC
Successfully done
> xuser list
-----------------------------------------------------------------
XUSER Entry 1
--------------
Key :DEFAULT
Username :SAPSID
UsernameUCS2 :S.A.P.S.I.D. . . . . . . . . . . . . . . . . . . . . . . . . . .
Password :?????????
PasswordUCS2 :?????????
Long Password :?????????
Dbname :SID
Nodename :bigmama
Sqlmode :SAPR3
Cachelimit :-1
Timeout 0
Isolation 0
Charset :<unspecified>
-----------------------------------------------------------------
XUSER Entry 2
--------------
Key :w
Username :SUPERDBA
UsernameUCS2 :S.U.P.E.R.D.B.A. . . . . . . . . . . . . . . . . . . . . . . . .
Password :?????????
PasswordUCS2 :?????????
Long Password :?????????
Dbname :SID
Nodename :bigmama
Sqlmode :SAPR3
Cachelimit :-1
Timeout 0
Isolation 0
Charset :<unspecified>
-----------------------------------------------------------------
XUSER Entry 3
--------------
Key :c
Username :CONTROL
UsernameUCS2 :C.O.N.T.R.O.L. . . . . . . . . . . . . . . . . . . . . . . . . .
Password :?????????
PasswordUCS2 :?????????
Long Password :?????????
Dbname :SID
Nodename :bigmama
Sqlmode :SAPR3
Cachelimit :-1
Timeout 0
Isolation 0
Charset :<unspecified>
-----------------------------------------------------------------
XUSER Entry 4
--------------
Key :c_J2EE
Username :CONTROL
UsernameUCS2 :C.O.N.T.R.O.L. . . . . . . . . . . . . . . . . . . . . . . . . .
Password :?????????
PasswordUCS2 :?????????
Long Password :?????????
Dbname :SID
Nodename :bigmama
Sqlmode :SAPR3
Cachelimit :-1
Timeout 0
Isolation 0
Charset :<unspecified>