主题: RHE7安装iRedmail失败,请教如何解决,谢谢

[root@localhost iRedMail-0.9.9]# bash iRedMail.sh
[ INFO ] Checking new version of iRedMail ...
[ INFO ] Preparing yum repositories ...
[ INFO ] Installing package(s): epel-release
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
iRedMail                                                              | 2.9 kB  00:00:00     
tmp_epel/x86_64/metalink                                              | 6.2 kB  00:00:00     
tmp_epel                                                              | 5.4 kB  00:00:00     
Package epel-release-7-12.noarch already installed and latest version
Nothing to do
。。。。。。
    [ OK ]
[ INFO ] Install package: dialog
[ INFO ] Installing package(s): dialog
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
No package dialog available.
Error: Nothing to do
[ INFO ] Install package: dialog
[ INFO ] Installing package(s): dialog
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
This system is not registered with an entitlement server. You can use subscription-manager to register.
No package dialog available.
Error: Nothing to do
[ INFO ] Checking configuration file: /var/iRedMail-0.9.9/config ...[ INFO ] NOT FOUND. Launching installation wizard.
/var/iRedMail-0.9.9/dialog/config_via_dialog.sh: line 44: dialog: command not found
[ INFO ] Exit.