Linux用户管理、文本处理、安装包管理(8)

  升级程序包:
    yum update [package1] [package2] [...]
    yum downgrade package1 [package2] [...] (降级)
  检查可用升级:
    yum check-update
  卸载程序包:
    yum remove | erase package1 [package2] [...]

  查看程序包information:
    yum info [...]
  查看指定的特性(可以是某文件)是由哪个程序包所提供:
    yum provides | whatprovides feature1 [feature2] [...]
  清理本地缓存:
    清除/var/cache/yum/$basearch/$releasever缓存
    yum clean [ packages | metadata | expire-cache | rpmdb | plugins | all ]
  构建缓存:
    yum makecache

搜索:yum search string1 [string2] [...]
  以指定的关键字搜索程序包名及summary信息
查看指定包所依赖的capabilities:
  yum deplist package1 [package2] [...]
查看yum事务历史:
  yum history [info|list|packages-list|packages-info|
  summary|addon-info|redo|undo|
  rollback|new|sync|stats]
  yum history
  yum history info 6
  yum history undo 6
日志 :/var/log/yum.log

  安装及升级本地程序包:
    yum localinstall rpmfile1 [rpmfile2] [...]
       (用install替代)
    yum localupdate rpmfile1 [rpmfile2] [...]
      (用update替代)
  包组管理的相关命令:
    yum groupinstall group1 [group2] [...]
    yum groupupdate group1 [group2] [...]
    yum grouplist [hidden] [groupwildcard] [...]
    yum groupremove group1 [group2] [...]
    yum groupinfo group1 [...]

yum的命令行选项:
  --nogpgcheck:禁止进行gpg check
  -y: 自动回答为“yes”
  -q:静默模式
  --disablerepo=repoidglob:临时禁用此处指定的repo
  --enablerepo=repoidglob:临时启用此处指定的repo
  --noplugins:禁用所有插件

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