Oracle 问题解决：RHEL 8 安装 19c 提示缺少 libnsl.so.1

在 RedHat Enterprise Linux 8 版本静默安装 Oracle 数据库软件时，提示缺少 libnsl.so.1 ，有时候在 CentOS 上也会有同样的问题。

1. 问题

静默安装数据库软件时，提示缺少库文件

[dbhome_1]$ ./runInstaller -silent -force -noconfig -responseFile /u01/app/oracle/product/19.0.0/dbhome_1/install/response/db_install.rsp 
> oracle.install.option=INSTALL_DB_SWONLY > ORACLE_HOSTNAME=henry > UNIX_GROUP_NAME=oinstall 
> INVENTORY_LOCATION=/u01/app/oraInventory > SELECTED_LANGUAGES=en,en_GB 
> ORACLE_HOME=/u01/app/oracle/product/19.0.0/dbhome_1 
> ORACLE_BASE=/u01/app/oracle
 > oracle.install.db.InstallEdition=EE
 > oracle.install.db.OSDBA_GROUP=dba 
> oracle.install.db.OSOPER_GROUP=oper
 > oracle.install.db.OSBACKUPDBA_GROUP=dba 
> oracle.install.db.OSDGDBA_GROUP=dba 
> oracle.install.db.OSKMDBA_GROUP=dba 
> oracle.install.db.OSRACDBA_GROUP=dba 
> SECURITY_UPDATES_VIA_MYORACLESUPPORT=false 
> DECLINE_SECURITY_UPDATES=true
/u01/app/oracle/product/19.0.0/dbhome_1/perl/bin/perl:
 error while loading shared libraries: 
libnsl.so.1: cannot open shared object file: No such file or directory
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2. 原因

缺少库文件

[ dbhome_1]$ ldd /u01/app/oracle/product/19.0.0/dbhome_1/perl/bin/perl
    Linux-vdso.so.1 (0x00007ffd40bc9000)
    libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f4d0f258000)
    libnsl.so.1 => not found
    libdl.so.2 => /lib64/libdl.so.2 (0x00007f4d0f054000)
    libm.so.6 => /lib64/libm.so.6 (0x00007f4d0ecd2000)
    libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00007f4d0eaa9000)
    libutil.so.1 => /lib64/libutil.so.1 (0x00007f4d0e8a5000)
    libc.so.6 => /lib64/libc.so.6 (0x00007f4d0e4e1000)
    libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f4d0e2c9000)
    /lib64/ld-Linux-x86-64.so.2 (0x00007f4d0f478000)
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3. 解决

安装库包

[ ~]# dnf install libnsl
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扩展：DNF 取代 YUM 。