RockyLinux9 Mail指令not found Cause mailx install yet

因為找不到mailx  所以去找 for rockylinux 8 or 9  的mailx

https://dl.rockylinux.org/pub/rocky/8/BaseOS/x86_64/os/Packages/m/底下找看看

mailx-xxxxxxxxx.el8.x86_64.rpm