redhat7.5在部署oracle 12.2、18.3时候，安装界面可能会出现乱码，这个是由于安装redhat7.x的时候少装了字体包，缺少字体所致，另外在安装goldengate时候也会出现乱码，安装部署时界面乱码如下：
这时可以安装如下字体：
yum install -y cjkuni-uming-fonts
如果还是乱码可以考虑安把下面的字体都安装上：
yum install -y cjkuni-uming-fonts
yum install -y dejavu-sans-fonts
yum install -y dejavu-sans-mono-fonts
yum install -y dejavu-serif-fonts
yum install -y gnu-free-mono-fonts
yum install -y gnu-free-sans-fonts
yum install -y gnu-free-serif-fonts
yum install -y google-crosextra-caladea-fonts
yum install -y google-crosextra-carlito-fonts
yum install -y jomolhari-fonts
yum install -y khmeros-base-fonts
yum install -y liberation-mono-fonts
yum install -y liberation-sans-fonts
yum install -y liberation-serif-fonts
yum install -y lklug-fonts
yum install -y lohit-assamese-fonts
yum install -y lohit-bengali-fonts
yum install -y lohit-devanagari-fonts
yum install -y lohit-gujarati-fonts
yum install -y lohit-kannada-fonts
yum install -y lohit-malayalam-fonts
yum install -y lohit-marathi-fonts
yum install -y lohit-nepali-fonts
yum install -y lohit-oriya-fonts
yum install -y lohit-punjabi-fonts
yum install -y lohit-tamil-fonts
yum install -y lohit-telugu-fonts
yum install -y madan-fonts
yum install -y nhn-nanum-gothic-fonts
yum install -y open-sans-fonts
yum install -y overpass-fonts
yum install -y paktype-naskh-basic-fonts
yum install -y paratype-pt-sans-fonts
yum install -y sil-abyssinica-fonts
yum install -y sil-nuosu-fonts
yum install -y sil-padauk-fonts
yum install -y smc-meera-fonts
yum install -y thai-scalable-waree-fonts
yum install -y ucs-miscfixed-fonts
yum install -y vlgothic-fonts
yum install -y wqy-microhei-fonts
yum install -y wqy-zenhei-fonts
安装好字体后，重新登录安装：
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