Configure sqlldr for batch uploading data to Oracle

I was trying to batch load data to Oracle from client site of computer (Ubuntu 64bit) and found that sqlldr was not installed. Here is a simple instruction of installing/enabling sqlldr on Ubuntu 64Bit.
1. make sure that Oracle Client was installed. If not, following this link to install.
2. Download Oracle Database Express Edition (oracle-xe-11.2.0-1.0.x86_64.rpm.zip) from here:
3. extract rpm file from the downloaded file

unzip -d oracle-ex oracle-xe-11.2.0-1.0.x86_64.rpm.zip
cd oracle-ex/Disk1
# extract files from rpm package
rpm2cpio oracle-xe-11.2.0-1.0.x86_64.rpm | cpio -idmv
# copy file sqlldr and folder mesg to local $ORACLE_HOME
sudo cp u01/app/oracle/product/11.2.0/xe/bin/sqlldr /usr/lib/oracle/11.2/client64/bin
# create fold rdbms/mesg at $ORACLE_HOME
sudo mkdir -p /usr/lib/oracle/11.2/client64/rdbms/mesg
#then copy files from mesg folder
sudo cp u01/app/oracle/product/11.2.0/xe/rdbms/mesg/* /usr/lib/oracle/11.2/client64/rdbms/mesg/

4. now you could run sqlldr to batch load data

sqlldr user/pass@//oracle_server:1521/devl control="RXNCONSO.ctl";