1、前提準備
yum -y install yum-fastestmirror cairo cairo-devel cgilib cpp e2fsprogs-devel flex fontconfig fontconfig-devel freetype freetype-demos freetype-devel freetype-utils gcc gcc-c++ gd gd-devel glib glib2-devel glibc glibc-common ImageMagick ImageMagick-deve krb5-devel libart_lgpl libart_lgpl-devel libcgi libjpeg-devel libpangocairo libpng libpng10 libpng10-devel libpng-devel libtool libxml2 libxml2-devel ncurses ncurses-devel openssl-devel pango pango-devel php-gd pixman pkg-config zlib zlib-devel
echo " /usr/bin/rdate -s time-a.nist.gov" >> /etc/rc.local //執行rdate指令，向其他主機詢問系統時間並顯示出來 –S是說同步別的服務器時間 –P就只是顯示而已，此步驟如果做了NTP略