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Troubleshooting
This chapter offers some pointers on how to get help when something goes wrong. It also discusses some common installation problems and their solutions.
Getting Help
There are many places on the internet which can help you when you encounter a problem not described in this chapter: discussion boards, blogs, IRC, and more. Some of the more popular places where you can find help include:
link:++https://ask.fedoraproject.org/en/questions/++[Ask Fedora] - Fedora's knowledge base, available in multiple languages
The #fedora IRC channel on link:++http://freenode.net/++[FreeNode] - one of the main IRC channels used by Fedora users, English only
link:++https://fedoraproject.org/wiki/++[Fedora Project Wiki] - the official wiki for Fedora Project
link:++http://unix.stackexchange.com/++[Stack Exchange] - an English language Q&A board, not specific to Fedora
The above list is by no means complete - you can find help in many other places as well. Additional information about available resources such as IRC channels and mailing lists is available at link:++https://fedoraproject.org/wiki/Communicating_and_getting_help++[].
Before you open a new discussion or ask anyone for help on IRC, you should always do some research on your own. If you are encountering an issue, there is usually a good chance that someone else ran into the same problem before you and published a solution somewhere. Opening a discussion about something already explained elsewhere, or asking a common question which has been answered many times before, is not likely to result in a friendly, constructive response.
When you ask for help troubleshooting problems related to the installation, you may be asked to provide log files generated by the installer. The sections below explain which files are generated, what their contents are, and how to transfer them from the installation system.
Log Files Generated During the Installation
For debugging purposes, [application]*Anaconda* logs installation actions into files in the `/tmp` directory. These files are listed in the following table.
Log Files and Their Contents
|Log file|Contents
|`/tmp/anaconda.log`|general [application]*Anaconda* messages
|`/tmp/program.log`|all external programs run during the installation
|`/tmp/storage.log`|extensive storage module information
|`/tmp/packaging.log`|[application]*dnf* and [application]*rpm* package installation messages
|`/tmp/syslog`|hardware-related system messages
If the installation fails, the messages from these files are consolidated into `/tmp/anaconda-tb-_identifier_pass:attributes[{blank}]`, where _identifier_ is a random string.
Transferring Log Files from the Installation System
All of the files described in xref:Troubleshooting.adoc#sect-troubleshooting-log-files[Log Files Generated During the Installation] reside in the installation program's RAM disk, which means they are not saved permamently and will be lost once the system is powered down. To store them permanently, copy those files to another system on the network using [command]#scp# on the system running the installation program, or copy them to a mounted storage device (such as an USB flash drive). Details on how to transfer the log files are below. Note that if you use an USB flash drive or other removable media, you should make sure to back up any data on it before starting the procedure.
====== Transferring Log Files Onto a USB Drive
On the system you are installing, press kbd:[Ctrl + Alt + F2] to access a shell prompt. You will be logged into a root account and you will have access to the installation program's temporary file system.
Connect a USB flash drive to the system and execute the [command]#dmesg# command. A log detailing all recent events will be displayed. At the bottom of this log, you will see a set of messages caused by the USB flash drive you just connected. It will look like a set of lines similar to the following:

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  2. f27/pages/install/Troubleshooting
  3. English
The #fedora IRC channel on link:++http://freenode.net/++[FreeNode] - one of the main IRC channels used by Fedora users, English only
The #fedora IRC channel on link:++http://freenode.net/++[FreeNode] - one of the main IRC channels used by Fedora users, English only
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./pages/install/Troubleshooting.adoc:18
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pot/f27/pages/install/Troubleshooting.pot, string 6