minimal installのときはmailコマンド入っていないようです(´∀`)
# yum -y install mailx
でOKでした。
以下、そのときのログ
[root@pc02 postfix]# yum install mailx Loaded plugins: fastestmirror, refresh-packagekit Loading mirror speeds from cached hostfile * base: rsync.atworks.co.jp * epel: ftp.riken.jp * extras: rsync.atworks.co.jp * rpmforge: ftp.riken.jp * updates: rsync.atworks.co.jp Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package mailx.x86_64 0:12.4-6.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved =================================================================================================================== Package Arch Version Repository Size =================================================================================================================== Installing: mailx x86_64 12.4-6.el6 base 234 k Transaction Summary =================================================================================================================== Install 1 Package(s) Total download size: 234 k Installed size: 452 k Is this ok [y/N]: y Downloading Packages: mailx-12.4-6.el6.x86_64.rpm | 234 kB 00:00 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : mailx-12.4-6.el6.x86_64 1/1 Installed: mailx.x86_64 0:12.4-6.el6 Complete!
メモメモ(`・ω・´)