今天安装RAC对环境配置后，进入ROOT里面，出现各种纠结问题，最后在一学长的指导下，顺利得到解决。
错误：
[root@orclcentos1 ~]# ls
ls: error while loading shared libraries: librt.so.1: cannot open shared object file: No such file or directory
[root@orclcentos1 ~]# vi
vi: error while loading shared libraries: libm.so.6: cannot open shared object file: No such file or directory
[root@orclcentos1 ~]# id
id: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
[root@orclcentos1 ~]# id
id: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
[root@orclcentos1 etc]# sar
sar: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
[root@orclcentos1 etc]# sar
sar: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
[root@orclcentos1 etc]# sar
sar: error while loading shared libraries: libc.so.6: cannot open shared object file: No such file or directory
...........
正常：
[root@orclcentos1 ~]# pwd
/root
[root@orclcentos1 ~]# pwd
/root
.......
是不是很奇怪，有些可以用，而有些不可以用。其他的centos,oracle都可以正常启用。
最后查看了一台一样的机械，发现 LD_ASSUME_KERNEL参数为空，而此台为4.19.
解决：[root@orclcentos1 ~]# unset LD_ASSUME_KERNEL 临时。
vi .bash_profile 去掉或者删除LD_ASSUME_KERNEL 永久
一切OK了，linux系统还需要大量的学习的啊。