/etc/yum/yum-updatesd.conf

[main]
# how often to check for new updates (in seconds)
run_interval = 864000

#多久检查更新,我设置成了10天

# how often to allow checking on request (in seconds)
updaterefresh = 600
#更新刷新周期,这个是为了避免服务器负担太重,建议保持默认,或者设置大点。

# how to send notifications (valid: dbus, email, syslog)
emit_via = dbus
# should we listen via dbus to give out update information/check for
# new updates
dbus_listener = yes
#以下三项为:是否自动安装更新,是否自动下载更新,是否自动下载依赖,建议全部设置成no,否则系统会在后台自动更新,导致前台的所有安装和更新程序被锁死。

# automatically install updates
do_update = no
# automatically download updates
do_download = no
# automatically download deps of updates
do_download_deps = no