centos服务器上（腾讯云）安装oracleXE

参考别人的方法：

oracleXE安装

不过安装的过程发现出错：

 Preparing...                ########################################### [100%]


 This system does not meet the minimum requirements for swap space.  Based on
 the amount of physical memory available on the system, Oracle Database 11g
 Express Edition requires 2048 MB of swap space. This system has 1023 MB
 of swap space.  Configure more swap space on the system and retry the
 installation.


 error: %pre(oracle-xe-11.2.0-1.0.x86_64) scriptlet failed, exit status 1
 error:   install: %pre scriptlet failed (2), skipping oracle-xe-11.2.0-1.0

发现没有设置交换空间，所以

 su - root
 dd if=/dev/zero of=/swapfile bs=2048 count=1048576
 mkswap /swapfile
 swapon /swapfile
 cp /etc/fstab /etc/fstab.backup_$(date +%N)
 echo '/swapfile swap swap defaults 0 0' >> /etc/fstab

 chown root:root /swapfile
 chmod 0600 /swapfile
 swapon -a
 swapon -s

装好后切换到oracle用户 

su oracle

回到根目录

cd

ls -la

修改.bash_profile文件

TMP=/tmp; export TMP  
TMPDIR=$TMP; export TMPDIR  
ORACLE_HOSTNAME=dbserver; export ORACLE_HOSTNAME  
ORACLE_UNQNAME=ORADB; export ORACLE_UNQNAME  
ORACLE_BASE=/u01/app/oracle; export ORACLE_BASE  
ORACLE_HOME=$ORACLE_BASE/product/11.2.0/xe; export ORACLE_HOME  
ORACLE_SID=ORADB; export ORACLE_SID  
PATH=/usr/sbin:$PATH; export PATH  
PATH=$ORACLE_HOME/bin:$PATH; export PATH  
LD_LIBRARY_PATH=$ORACLE_HOME/lib:/lib:/usr/lib; export LD_LIBRARY_PATH  
CLASSPATH=$ORACLE_HOME/jlib:$ORACLE_HOME/rdbms/jlib; export CLASSPATH 

source .bash_profile

测试

echo $ORACLE_BASE

sqlplus / as sysdba  #查看是否可以进入sql命令行

成功！