【解决办法】编辑/etc/profile在最后添加配置项,可参考以下设置:
export TNS_ADMIN=/usr/lib/oracle/19.18/client64
export ORACLE_HOME=/usr/lib/oracle/19.18/client64
export ORACLE_SID=orcl
export NLS_LANG=AMERICAN_AMERICA.AL32UTF8
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH
export PATH=$ORACLE_HOME/bin:$ORACLE_HOME/lib:$PATH