error while loading shared libraries: $ORACLE_HOME/lib/libnnz10.so: cannot restore segment prot after reloc: Permission denied最后的Permission denied显示,初步认为是系统安全屏蔽了oracle执行某些执行动作。于是检查系统防火墙iptables,已经关闭,于是想到了Selinux,[root@localhost ~]# more /etc/sysconfig/selinux# This file controls the state of SELinux on the system.# SELINUX= can take one of these three values:# enforcing - SELinux security policy is enforced.# permissive - SELinux prints warnings instead of enforcing.# disabled - SELinux is fully disabled.SELINUX=enforcing# SELINUXTYPE= type of policy in use. Possible values are:# targeted - Only targeted network daemons are protected.# strict - Full SELinux protection.SELINUXTYPE=targeted看来是selinux的缘故,关掉selinux试试!修改SELINUX=disabled,然后重启系统才能生效,或者执行:setenforce 0,立即生效。果然,关闭selinux后,sqlplus可以正常登陆了。其实在上面出现Permission denied时,也可以执行#chcon -t texrel_shlib_t $ORACLE_HOME/lib/*.so问题也可以得到解决,至于chcon可以看看selinux方面的命令即可明白了!