该命令被包ncurses包含:

名称 : ncurses
架构 : x86_64
时期 : 0
版本 : 5.9
发布 : 16.20140323.fc21
大小 : 433 k
仓库 : @System
概要 : Ncurses support utilities
URL : http://invisible-island.net/ncurses/ncurses.html
协议 : MIT
描述 : The curses library routines are a terminal-independent method of
: updating character screens with reasonable optimization. The
: ncurses (new curses) library is a freely distributable replacement
: for the discontinued 4.4 BSD classic curses library.
:
: This package contains support utilities, including a terminfo
: compiler tic, a decompiler infocmp, clear, tput, tset, and a
: termcap conversion tool captoinfo.

上面是该包的详细信息

使用yum reinstall ncurses 重新安装