安装rac集群，安装oracle软件，安装完成，验证，sqlplus -v不出现，那肯定是环境变量的问题。

：-bash: rlwrap: command not found，

su - oracle

[oracle@db1 ~]$ vi .bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH
export PS1
umask 022
alias sqlplus="rlwrap sqlplus"
export TMP=/tmp
export
export TMPDIR=$TMP
export ORACLE_HOSTNAME=db1
ORACLE_SID=orcl1; export ORACLE_SID
ORACLE_TERM=xterm; export ORACLE_TERM
ORACLE_BASE=/oracle; export ORACLE_BASE
ORACLE_HOME=/oracle/home; export ORACLE_HOME
NLS_DATE_FORMAT="yyyy-mm-dd HH24:MI:SS"; export NLS_DATE_FORMAT
PATH=.:$PATH:$HOME/bin:$ORACLE_HOME/bin; export PATH
THREADS_FLAG=native; export THREADS_FLAG
".bash_profile" 27L, 627C

百度前辈们，给出建议，要安装rlwrap工具可以解决，但是我没有解决

https://www.cnblogs.com/xuzhiwei/p/3700051.html

就直接修改环境变量，把它注掉

[oracle@db1 ~]$ vi .bash_profile
# .bash_profile

# Get the aliases and functions
if [ -f ~/.bashrc ]; then
        . ~/.bashrc
fi

# User specific environment and startup programs

PATH=$PATH:$HOME/bin

export PATH
export PS1
umask 022
#alias sqlplus="rlwrap sqlplus"
export TMP=/tmp
export
export TMPDIR=$TMP
export ORACLE_HOSTNAME=db1
ORACLE_SID=orcl1; export ORACLE_SID
ORACLE_TERM=xterm; export ORACLE_TERM
ORACLE_BASE=/oracle; export ORACLE_BASE
ORACLE_HOME=/oracle/home; export ORACLE_HOME
NLS_DATE_FORMAT="yyyy-mm-dd HH24:MI:SS"; export NLS_DATE_FORMAT
PATH=.:$PATH:$HOME/bin:$ORACLE_HOME/bin; export PATH
THREADS_FLAG=native; export THREADS_FLAG
".bash_profile" 27L, 627C

source .bash__profile

l另外打开一个会话，验证

[oracle@db1 ~]$ sqlplus -v

SQL*Plus: Release 11.2.0.4.0 Production