do-release-upgrade --quiet / -q 没有定义它的作用

Question

有谁知道do-release-upgrade -q实际上是什么？

希望它可以在不需要与之交互的情况下进行升级，如果是这种情况，它会覆盖配置还是保留原始配置？或者它会做其他事情吗？

stephenm@mcr-pc-29392:~$ do-release-upgrade --help
Usage: do-release-upgrade [options]

Options:
  -h, --help            show this help message and exit
  -V, --version         Show version and exit
  -d, --devel-release   Check if upgrading to the latest devel release is
                        possible
  --data-dir=DATA_DIR   Directory that contains the data files
  -p, --proposed        Try upgrading to the latest release using the upgrader
                        from $distro-proposed
  -m MODE, --mode=MODE  Run in a special upgrade mode. Currently 'desktop' for
                        regular upgrades of a desktop system and 'server' for
                        server systems are supported.
  -f FRONTEND, --frontend=FRONTEND
                        Run the specified frontend
  -s, --sandbox         Test upgrade with a sandbox aufs overlay
  -c, --check-dist-upgrade-only
                        Check only if a new distribution release is available
                        and report the result via the exit code
  -q, --quiet

手册页甚至没有提到它。

DO-RELEASE-UPGRADE(8)                                                                                                  DO-RELEASE-UPGRADE(8)

NAME
       do-release-upgrade - upgrade operating system to latest release

SYNOPSIS
       do-release-upgrade [options]

DESCRIPTION
       Upgrade  the  operating  system  to  the  latest  release from the command-line.  This is the preferred command if the machine has no
       graphic environment or if the machine is to be upgraded over a remote connection.

OPTIONS
       -h, --help
              show help message and exit

       -d, --devel-release
              Check if upgrading to the latest devel release is possible

       -p, --proposed
              Try upgrading to the latest release using the upgrader from Ubuntu-proposed

       -m MODE, --mode=MODE
              Run in a special upgrade mode. Currently "desktop" for regular upgrades of a desktop system and "server"  for  server  systems
              are supported.

       -f FRONTEND, --frontend=FRONTEND
              Run the specified frontend

       -s, --sandbox
              Test upgrade with a sandbox aufs overlay

SEE ALSO
       update-manager(8), apt-get(8)

Answer 1

好吧，我通过测试对此进行了研究，我安装了虚拟 Ubuntu 10.04 编辑了一些配置文件并运行了 do-release-upgrade -q，

它的运行完全一样，我有关于 mysql 密码和修改配置的所有相同问题需要回答。

这促使我查看代码以弄清楚它到底做了什么。do-release-upgrade 的代码在这里

仔细看一下，使用该选项似乎-q只是忽略了一点点输出。

据我所知，这是它唯一省略的内容。

if not options.quiet:
    print _("Checking for a new ubuntu release")

..

if not options.quiet:
      print _("No new release found")

...

if not options.quiet:
      print _("Release upgrade not possible right now") 
      print _("The release upgrade can not be performed currently, "
              "please try again later. The server reported: '%s'") % m.new_dist.upgrade_broken
    sys.exit(NO_RELEASE_AVAILABLE)

看起来除了省略上面的输出之外什么也没做，至少可以说，在升级输出的宏伟计划中，这只是很小的输出。