Moved Oracle 11.2 XE Directory, Connected to Idle Instance

Question

So I will start off by stating I have moved the regular install location of Oracle 11.2 XE to a logical volume (/oracle) I had created on my RHEL 6.6 server. After shutting down both the database and the Oracle listener, I performed...
    $ cp -R /u01/app/* /oracle
    $ rm -rf /u01/app/oracl
    $ ln -s /oracle/oracle /u01/app/oracle
Then restarted the listener and the database. Now when I attempt to run the following as the user 'oracle' I get a message...
    $ sqlplus
    Enter user-name: sys / as sysdba
    Enter password: ****
    Connected to idle instance.
Further, when I attempt a startup I get an error.
    > startup
    ORA-45301: XE Edition single instance violation error
I have attempted the solutions found  to no avail.
Here is the output for my listener controller:
    bash-4.1$ lsnrctl status
    LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 10-MAR-2015 10:26:25
    Copyright (c) 1991, 2011, Oracle.  All rights reserved.
    Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
    STATUS of the LISTENER
    Alias                     LISTENER
    Version                   TNSLSNR for Linux: Version 11.2.0.2.0 - Production
    Start Date                10-MAR-2015 10:25:57
    Uptime                    0 days 0 hr. 0 min. 28 sec
    Trace Level               off
    Security                  ON: Local OS Authentication
    SNMP                      OFF
    Default Service           XE
    Listener Parameter File   /u01/app/oracle/product/11.2.0/xe/network/admin/listener.ora
    Listener Log File         /u01/app/oracle/diag/tnslsnr/dev/listener/alert/log.xml
    Listening Endpoints Summary...
      (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC_FOR_XE)))
      (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=dev)(PORT=1521)))
    Services Summary...
    Service "PLSExtProc" has 1 instance(s).
      Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
    The command completed successfully
I'm really quite lost as to what to attempt next. I know I could just reinstall and keep the directory in its proper location but I need it to be in it's own logical volume.
Some further information to help clarify my system...
    bash-4.1$ env | grep ORA
    ORACLE_SID=XE
    ORACLE_BASE=/oracle/oracle
    ORACLE_HOME=/oracle/oracle/product/11.2.0/xe
    bash-4.1$ env | grep TNS
    TNS_ADMIN=/oracle/oracle/product/11.2.0/xe/network/admin
    bash-4.1$ ps -aux | grep pmon
    oracle    2431  0.0  0.2 1265956 16652 ?       Ss   11:43   0:00 xe_pmon_XE
EDIT
Attempting to sign in to sqlplus using the SYSTEM user returned an error:
    ORA-01034: ORACLE not available
    ORA-27101: shared memory realm does not exist
    Linux-x86_64 Error: 2: No such file or directory
FURTHER EDIT
Output of the ipcs command
    bash-4.1$ ipcs
    ------ Shared Memory Segments --------
    key        shmid      owner      perms      bytes      nattch     status
    0xc0a59444 32768      oracle     660        4096       0
    ------ Semaphore Arrays --------
    key        semid      owner      perms      nsems
    0xd4a9963c 229378     oracle     660        104
    0x884d8f34 491523     oracle     660        104
    ------ Message Queues --------
    key        msqid      owner      perms      used-bytes   messages

Answer 1

Already solved this issue. The problem was due to incorrect set of env variables:
export ORACLE_BASE=/home/oracle/
export ORACLE_HOME=$ORACLE_BASE/11G
resulted:
ORACLE_HOME=/home/oracle//11G
Linux is capable of retrieving directory content if path is set with *"//"* but seems like oracle does not. Due to this I've got this error. After resetting ORACLE_HOME variable, everything worked.