在Linxu下的sqlplus無法使用上下鍵問題可以安裝rlwrap來解決，具體如下：

1.安裝readline

```
[root@rac1 iso]# yum install readline*
```

2.安裝rlwrap

```
[root@rac1 opt]# tar -zxvf rlwrap-0.42.tar.gz
[root@rac1 opt]# cd rlwrap-0.42
[root@rac1 rlwrap-0.42]# ls
aclocal.m4 ChangeLog    configure     doc      Makefile.am PLEA    test
AUTHORS     completions configure.ac filters Makefile.in README TODO
BUGS        config.h.in COPYING       INSTALL NEWS         src     tools
[root@rac1 rlwrap-0.42]# ./configure
Now do:
    make (or gmake) to build rlwrap
    make check       for instructions how to test it
    make install     to install it
[root@rac1 rlwrap-0.42]# make
[root@rac1 rlwrap-0.42]# make check
[root@rac1 rlwrap-0.42]# make install
```

3.在環境變數中新增別名

```
[root@rac1 opt]# vi /home/oracle/.bash_profile
alias sqlplus='rlwrap sqlplus'
alias rman='rlwrap rman'
```

rlwrap安裝(解決Linux下無法使用上下鍵)

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