diff options
Diffstat (limited to 'doc/apt.conf.5.xml')
| -rw-r--r-- | doc/apt.conf.5.xml | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/doc/apt.conf.5.xml b/doc/apt.conf.5.xml index e752f9d27..36b65b073 100644 --- a/doc/apt.conf.5.xml +++ b/doc/apt.conf.5.xml @@ -151,11 +151,22 @@ DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt";}; </varlistentry> <varlistentry><term>Immediate-Configure</term> - <listitem><para>Disable Immediate Configuration; This dangerous option disables some - of APT's ordering code to cause it to make fewer dpkg calls. Doing - so may be necessary on some extremely slow single user systems but - is very dangerous and may cause package install scripts to fail or worse. - Use at your own risk.</para></listitem> + <listitem><para>Defaults to on which will cause APT to install essential and important packages + as fast as possible in the install/upgrade operation. This is done to limit the effect of a failing + &dpkg; call: If this option is disabled APT doesn't treat an important package in the same way as + an extra package: Between the unpacking of the important package A and his configuration can then + be many other unpack or configuration calls, e.g. for package B which has no relation to A, but + causes the dpkg call to fail (e.g. because maintainer script of package B generates an error) which results + in a system state in which package A is unpacked but unconfigured - each package depending on A is now no + longer guaranteed to work as their dependency on A is not longer satisfied. The immediate configuration marker + is also applied to all dependencies which can generate a problem if the dependencies e.g. form a circle + as a dependency with the immediate flag is comparable with a Pre-Dependency. So in theory it is possible + that APT encounters a situation in which it is unable to perform immediate configuration, error out and + refers to this option so the user can deactivate the immediate configuration temporary to be able to perform + an install/upgrade again. Note the use of the word "theory" here as this problem was only encountered by now + in real world a few times in non-stable distribution versions and caused by wrong dependencies of the package + in question, so you should not blindly disable this option as the mentioned scenario above is not the only + problem immediate configuration can help to prevent in the first place.</para></listitem> </varlistentry> <varlistentry><term>Force-LoopBreak</term> |