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To get oriented and learn what makes our distribution distinctive, see the [http://alpinelinux.org/about About page] or [[Alpine Linux:Overview|our more detailed overview]].
 
 
 
[[Image:filetypes.svg|64px|left|link=]]
 
[[Image:filetypes.svg|64px|left|link=]]
 
This is a list of '''frequently asked questions''' about Alpine Linux.<br>
 
This is a list of '''frequently asked questions''' about Alpine Linux.<br>
Line 7: Line 5:
  
 
=General=
 
=General=
 +
 +
Alpine Linux is used heavily in containers (e.g. docker images) on servers, so many of its main packages are focused on server services.
 +
 +
== Where to start? ==
 +
 +
The [[Installation]] page provides a basic orientation, and links to further pages.
 +
 +
But some wider overview on what makes the distribution distinctive may be found on the official [http://alpinelinux.org/about About page], and the [[Alpine Linux:Overview|Overview]] wikipage.
 +
 +
Note that trials and experimenting may safely be done by installing Alpine Linux within a virtual machine on your current maching.
  
 
== I have found a bug, where can I report it? ==
 
== I have found a bug, where can I report it? ==
You can report it on the [http://bugs.alpinelinux.org/ bugtracker].
+
 
 +
You can report it on the '''https://gitlab.alpinelinux.org/groups/alpine/-/issues link of the bugtracker'''. But first search if was already reported.
  
 
== Are there any details about the releases available? ==
 
== Are there any details about the releases available? ==
 
Yes, please check the [[Alpine Linux:Releases|Releases]] page.
 
Yes, please check the [[Alpine Linux:Releases|Releases]] page.
 
== Alpine freezes during boot from Compact Flash, how can I fix? ==
 
Most Compact Flash card readers do not support proper DMA.<br>
 
You should append '''nodma''' to the ''append'' line in {{path|syslinux.cfg}}.
 
  
 
== How can I contribute? ==
 
== How can I contribute? ==
 
You can contribute by:
 
You can contribute by:
* using the software and giving feedback
+
* Using the software and giving feedback.
* by documenting your [http://www.alpinelinux.org Alpine Linux] experiences on this [[Main_Page|wiki]]
+
* Documenting your [http://www.alpinelinux.org Alpine Linux] experiences on this [[Main_Page|wiki]].
* in many other ways
+
* In many other ways.
 
Please visit [[Contribute|Contribute page]] to read more about this topic.
 
Please visit [[Contribute|Contribute page]] to read more about this topic.
  
Your contributions are highly appreciated.
+
== Why don't I have man pages or where is the 'man' command? ==
 +
The <code>man</code> command and man pages are not installed by default.
  
== How do I remove the CDROM? ==
+
* First, install the {{pkg|man-db}} package:
Since the modloop loopback device is on CDROM you cannot just run ''eject''. You need to unmount the modloop first.<br>
+
<code>apk add man-db</code>
Unmounting both the modloop and the cdrom in one step can be done by executing:
+
* Once that's done, install the documentation for the packages that you require man pages for:
{{cmd|/etc/init.d/modloop stop}}
+
<code>apk add ''package''-doc</code>
 +
 
 +
For example, say you installed {{Pkg|iptables}} and you now require its man pages:
 +
<code>apk add iptables-doc</code> and then: <code>man iptables</code>. Keep in mind, not all packages will have a corresponding documentation package In our example above, we installed the man pages (and other documentation) for <code>iptables</code>
 +
 
 +
== What is the difference between edge and stable releases? ==
 +
Stable releases are just what they sound like: initially a point-in-time snapshot of the package archives, but then maintained with bug-fixes only in order to keep a stable environment.
 +
 
 +
[[Edge]] is more of a rolling-release, with the latest and greatest packages available in the online repositories.<br>
 +
Occasionally, snapshot ISO images of the then-current state of [[edge]] are made and are available for download.<br>
 +
Typically these are made when there are major kernel upgrades or package upgrades that require initramfs rebuilds.
 +
 
 +
== What architectures does Alpine support? ==
 +
As Alpine uses the Linux kernel, it supports:
 +
* '''x86_64''': The popular AMD64 compatible 64-bit x86 based machines, i386 is not recommended for newer/latest hardware.
 +
* '''s390x''': For the Super powered IBM mainframes, especially IBM Z and IBM LinuxONE servers.
 +
* '''ppc64le''': For the PowerPC devices with pure little-endian mode, mostly for POWER8 and POWER9
 +
* '''x86''': (i386 pc 32bit) and x86_64 (i686 pc 64bit and amd64)
 +
* '''armhf''': The newer ARM hard-float for newer, more powerful 32-bit devices alongside 64-bit
 +
* '''armv7''': The 32-bit ARM only execution state of the ARMv7 devices machines.
 +
* '''aarch64''': The 64-bit ARM only execution state of the ARMv8 device machines.
 +
* '''ppc64le''': for 64-bit big-endian PowerPC and Power ISA processors like some MAC computers.
 +
* '''s390x''': for Server for IBM Z and LinuxONE mainframes.
 +
'''Please check [https://alpinelinux.org/downloads Download] page for media availability on each one''' and check [[Alpine_Linux:Releases|Releases]] pages for latest.
 +
 
 +
== What kind of release of Alpine Linux are available? ==
 +
Please check the [[Alpine_Linux:Releases|Releases]] page for more information.
 +
 
 +
=Setup=
 +
 
 +
== What is the difference between 'sys', 'data', and 'diskless' when running 'setup-alpine' or 'setup-disk'? ==
 +
'''sys:''' This mode is a traditional disk install. The following partitions will be created on the disk: <nowiki>/boot</nowiki>, <nowiki>/</nowiki> (filesystem root) and <nowiki>swap</nowiki>.<br>
 +
This mode may be used for development boxes, desktops, virtual servers, etc.
  
Then it's possible to eject the cdrom:
+
'''data:''' This mode uses your disk(s) for data storage, not for the operating system. Runs from the media and only <nowiki>/var</nowiki> is created on disk.  The system itself will run from tmpfs (RAM).  Use this mode if you only want to use the disk(s) for a mailspool, databases, logs, etc.
{{cmd|eject}}
 
  
== Why don't I have man pages or where is the 'man' command? ==
+
'''diskless:''' No disks are to be used.  [[Alpine local backup]] may still be used in this mode.
The {{pkg|man}} command and man pages are not installed by default.
 
  
* First, install the {{pkg|man}} package:
+
These modes are explained further [[Installation#Overview_of_run_modes_for_Alpine_system|on the '''Installation''' page]].
: {{Cmd|apk add man}}
 
* Once that's done, install the documentation for the packages that you require man pages for:<br />(Keep in mind, however, it's possible that not all packages will have a corresponding documentation package.)
 
: {{Cmd|apk add <pkg>-doc}}
 
: For example, say you installed {{pkg|iptables}} and you now require its {{pkg|man}} pages:
 
: {{Cmd|apk add iptables-doc}}
 
<br />
 
In our example above, we installed the man pages (and other documentation) for iptables. We can now read it:
 
{{Cmd|man iptables}}
 
  
==Booting Alpine on an HP ML350 G6==
+
== How do I upgrade Alpine? ==
{{Note|This 'Booting Alpine on an HP ML350 G6' section, only applies to [http://www.alpinelinux.org/ Alpine Linux] 1.9.3 and earlier.}}
 
[http://bugs.alpinelinux.org/issues/228 Ticket 228] on [http://bugs.alpinelinux.org/ bugs.alpinelinux.org] includes a patch that disables the kernel module hpwdt by default.
 
  
Details: Kernel module for HP Watchdog Timer causes issues during boot.  Solution is to create an overlay (ie {{path|hpwdt.apkovl.tar.gz}}) containing {{path|/etc/modprobe.d/hpwdt}} (which contains "blacklist hpwdt"), place that on some removable media (ie USB key) and insert that during boot process.  This will insure that the offending module doesn't load and that the server will boot properly.
+
To upgrade to a new stable release or edge:
 +
<code>apk upgrade --available</code>
  
 
==My cron jobs don't run?==
 
==My cron jobs don't run?==
The cron daemon is started automatically on system boot and executes the scripts placed in the folders under {{path|/etc/periodic}} - there's a {{path|15min}} folder, plus ones for {{path|hourly}}, {{path|daily}}, {{path|weekly}} and {{path|monthly}} scripts.
+
 
 +
Start service ''crond'' and add it to runlevel:
 +
 
 +
: {{cmd|rc-service crond start && rc-update add crond}}
 +
 
 +
After that the cron daemon is started automatically on system boot and executes the scripts placed in the folders under {{path|/etc/periodic}} - there's a {{path|15min}} folder, plus ones for {{path|hourly}}, {{path|daily}}, {{path|weekly}} and {{path|monthly}} scripts.
  
 
You can check whether your scripts are likely to run using the command:
 
You can check whether your scripts are likely to run using the command:
  
: {{cmd|run-parts -t /etc/periodic/[foldername]}} - for example: ''run-parts -t /etc/periodic/15min''
+
: {{cmd|run-parts --test /etc/periodic/[foldername]}} - for example: ''run-parts --test /etc/periodic/15min''
  
 
This command will tell you what should run but will not actually execute the scripts.
 
This command will tell you what should run but will not actually execute the scripts.
Line 69: Line 101:
 
* Do not put file extensions on your script names - this stops them from working; for example: {{path|myscript}}  will run, but {{path|myscript.sh}} won't
 
* Do not put file extensions on your script names - this stops them from working; for example: {{path|myscript}}  will run, but {{path|myscript.sh}} won't
  
== What is the difference between edge and stable releases? ==
+
= Time and timezones =
Stable releases are just what they sound like: initially a point-in-time snapshot of the package archives, but then maintained with bugfixes only in order to keep a stable environment.
+
 
 +
== How do I set the local timezone? ==
 +
 
 +
Starting in Alpine 2.2, setting the timezone can be done through the [[Setup-alpine|setup-alpine]] script, and no manual settings should be necessary.<br>
 +
If you wish to edit the timezone after installation, run the [[Alpine_setup_scripts|setup-timezone]] script.
 +
 
 +
= Packages =
 +
 
 +
== Can you build an apk package for ...? ==
 +
Yes, we probably can.<br>
 +
Please create an [https://gitlab.alpinelinux.org/alpine/aports/issues/new issue] in the [https://gitlab.alpinelinux.org bugtracker]. Prefix with "feat" in title and include a short description (one-line), an url for the home page, and an url for the source package.
 +
 
 +
== How can I build my own package? ==
 +
Please see the [[Creating an Alpine package]] page.
 +
 
 +
== What does "required by: world[$pkgname]" mean? ==
 +
 
 +
It means that the package you try to install does not exist in the repositories you have configured in <code>/etc/apk/repositories</code>. Maybe you forgot to add community, testing or unmaintained to /etc/apk/repositories?
 +
 
 +
== How can I find out if a certain package exists in Alpine? ==
 +
 
 +
If you want to only search repositories you have configured in /etc/apk/repositories, then <code>apk search $pkgname</code> should get you sorted. If you want to search all repositories have a look at the [https://pkgs.alpinelinux.org/ online pkg oracle]
 +
 
 +
== WARNING: Ignoring APKINDEX.xxxx.tar.gz ==
 +
If you get <code>WARNING: Ignoring APKINDEX.xxxx.tar.gz: No such file or directory</code> while running package related tools, check your {{path|/etc/apk/repositories}} file if an entry points to {{path|.../v2.4/testing/}}. This directory is gone.
 +
 
 +
To check the content of the repositories file
 +
{{Cmd|cat /etc/apk/repositories}}
 +
 
 +
or
 +
{{Cmd|setup-apkrepos}}
 +
 
 +
= Dynamic DNS =
 +
== How do I schedule a regular dynamic DNS update? ==
 +
You'll want to install the {{pkg|ez-ipupdate}} package:
 +
{{cmd|apk add ez-ipupdate}}
 +
 
 +
After that, create a new file at {{path|/etc/ez-ipupdate.conf}} with contents similar to:
 +
service-type=dyndns
 +
user=myusername:mypassword
 +
interface=eth1
 +
host=myhostname.dyndns.org
 +
 
 +
Make the new ip cache directory:
 +
{{cmd|mkdir /var/cache/ez-ipupdate
 +
lbu add /var/cache/ez-ipupdate}}
 +
 
 +
Then schedule a new cron job with this command:
 +
{{cmd|echo >> /var/log/ez-ipupdate && \<br>/bin/date >> /var/log/ez-ipupdate && \<br>ez-ipupdate --config-file /etc/ez-ipupdate.conf -f -F /var/run/ez-ipupdate.pid \<br>  --cache-file /var/cache/ez-ipupdate/ipcache --quiet >> /var/log/ez-ipupdate 2>&1}}
 +
 
 +
Don't forget to backup your settings!
 +
{{cmd|lbu ci}}
 +
 
 +
= Terminal =
 +
 
 +
== How to enable/fix colors for git? ==
  
[[Edge]] is more of a rolling-release, with the latest and greatest packages available in the online repositories.<br>
+
The problem is not in git itself or terminal, but in the <tt>less</tt> command.
Occasionally, snapshot ISO images of the then-current state of [[edge]] are made and are available for download.<br>
+
Busybox’s <tt>less</tt> doesn’t support <tt>-r</tt> (<tt>--raw-control-chars</tt>) and <tt>-R</tt> (<tt>--RAW-CONTROL-CHARS</tt>) options.
Typically these are made when there are major kernel upgrades or package upgrades that require initramfs rebuilds.
 
  
== What kind of release of Alpine Linux are available? ==
+
The simplest (yet not ideal) solution is to install GNU less:
Please check the [[Alpine_Linux:Releases|Releases]] page for more information.
 
  
=Setup=
+
{{cmd|apk add less}}
  
== What is the difference between 'sys', 'data', and 'diskless' installs when running setup-alpine (or setup-disk)? ==
+
= Old questions, no longer freqently asked =
'''sys:''' This mode is a traditional disk install. The following partitions will be created on the disk: /boot, / (filesystem root) and swap.<br>
 
This mode may be used for development boxes, desktops, virtual servers, etc.
 
  
'''data:''' This mode uses your disk(s) for data storage, not for the operating system. The system itself will run from tmpfs (RAM).
+
== Alpine freezes during boot from Compact Flash, how can I fix? ==
 +
Most Compact Flash card readers do not support proper DMA.<br>
 +
You should append '''nodma''' to the ''append'' line in {{path|syslinux.cfg}}.
  
Use this mode if you only want to use the disk(s) for a mailspool, databases, logs, etc.
+
== How do I remove the CDROM? ==
 +
Since the modloop loopback device is on CDROM you cannot just run <code>eject</code>. You need to unmount the modloop first.<br>
 +
Unmounting both the modloop and the CDROM in one step can be done by executing:
 +
{{Cmd|/etc/init.d/modloop stop}}
  
'''diskless:''' No disks are to be used.  [[Alpine local backup]] may still be used in this mode.
+
Then it's possible to eject the CDROM:
 +
{{Cmd|eject}}
  
 
== How can I install a custom firmware in a diskless system? ==
 
== How can I install a custom firmware in a diskless system? ==
Line 96: Line 185:
 
To fix this issue you can copy the firmware directory to your writeable media (cf/usb) and copy your custom firmware to it.<br>
 
To fix this issue you can copy the firmware directory to your writeable media (cf/usb) and copy your custom firmware to it.<br>
 
After reboot Alpine should automatically use the directory on your local storage instead of the loopback device.
 
After reboot Alpine should automatically use the directory on your local storage instead of the loopback device.
 
=Audio=
 
  
 
== How do I play my .ogg/.mp3 files? ==
 
== How do I play my .ogg/.mp3 files? ==
Line 110: Line 197:
 
aumix (set volume settings)
 
aumix (set volume settings)
 
play really_cool_song.mp3}}
 
play really_cool_song.mp3}}
 
= Time and timezones =
 
 
== How do I set the local timezone? ==
 
 
Starting in Alpine 2.2, setting the timezone can be done through the [[Setup-alpine|setup-alpine]] script, and no manual settings should be necessary.<br>
 
If you wish to edit the timezone after installation, run the [[Alpine_setup_scripts|setup-timezone]] script.
 
 
However, if you are using a previous version, please use the following steps:
 
 
/etc/timezone and the whole zoneinfo directory tree are not supported.
 
To set the timezone, set the TZ environment variable as specified in
 
http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html
 
or you may also create an /etc/TZ file of a single line, ending with a
 
newline, containing the TZ setting.  For example
 
echo CST6CDT > /etc/TZ
 
''Source: http://www.uclibc.org/downloads/Glibc_vs_uClibc_Differences.txt''
 
 
For more information, see how other uClibc-based distributions do this:
 
* http://leaf.sourceforge.net/doc/buci-tz3.html
 
* http://www.sonoracomm.com/index.php?option=com_content&task=view&id=107&Itemid=32
 
 
For a more complete list of timezones, please see: http://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 
  
 
== OpenNTPD reports an error with "adjtime" ==
 
== OpenNTPD reports an error with "adjtime" ==
Line 162: Line 226:
 
Only thing to do is wait, do something else for 15-20mins and then check.
 
Only thing to do is wait, do something else for 15-20mins and then check.
  
= Packages =
 
== Can you build an apk package for ...? ==
 
Yes, we probably can.<br>
 
Please create an [http://redmine.alpinelinux.org/projects/alpine/issues/new issue] in the [http://bugs.alpinelinux.org bugtracker]. Mark it as "feature" and include a short description (one-line), an url for the home page, and an url for the source package.
 
 
== How can I build my own package? ==
 
Please see the [[Creating an Alpine package]] page.
 
 
== WARNING: Ignoring APKINDEX.xxxx.tar.gz ==
 
If you get <code>WARNING: Ignoring APKINDEX.xxxx.tar.gz: No such file or directory</code> while running package related tools, check your {{path|/etc/apk/repositories}} file if an entry points to {{path|.../v2.4/testing/}}. This directory is gone.
 
 
To check the content of the repositories file
 
{{Cmd|cat /etc/apk/repositories}}
 
 
or
 
{{Cmd|setup-apkrepos}}
 
 
= Dynamic DNS =
 
== How do I schedule a regular dynamic DNS update? ==
 
You'll want to install the {{pkg|ez-ipupdate}} package:
 
{{cmd|apk add ez-ipupdate}}
 
  
After that, create a new file at {{path|/etc/ezipupdate.conf}} with the contents similar to:
+
[[Category:Newbie]]
service-type=dyndns
 
user=myusername:mypassword
 
interface=eth1
 
host=myhostname.dyndns.org
 
 
 
Make the new ip cache directory:
 
{{cmd|mkdir /var/cache/ez-ipupdate
 
lbu add /var/cache/ez-ipupdate}}
 
 
 
Then schedule a new cron job with this command:
 
{{cmd|echo >> /var/log/ez-ipupdate && /bin/date >> /var/log/ez-ipupdate && ez-ipupdate --config /etc/ez-ipupdate.conf -f -F /var/run/ez-ipupdate.pid --cache-file /var/cache/ez-ipupdate/ipcache --quiet >> /var/log/ez-ipupdate 2>&1}}
 
 
 
Don't forget to backup your settings!
 
{{cmd|lbu ci}}
 

Latest revision as of 03:17, 11 September 2020

Filetypes.svg

This is a list of frequently asked questions about Alpine Linux.
If your question is not answered on this page, use the search box above to find work in progress pages not linked here, or in case of no answer, edit this page and write down your question.

Tip: Prepare your question. Think it through. Make it simple and understandable.

General

Alpine Linux is used heavily in containers (e.g. docker images) on servers, so many of its main packages are focused on server services.

Where to start?

The Installation page provides a basic orientation, and links to further pages.

But some wider overview on what makes the distribution distinctive may be found on the official About page, and the Overview wikipage.

Note that trials and experimenting may safely be done by installing Alpine Linux within a virtual machine on your current maching.

I have found a bug, where can I report it?

You can report it on the https://gitlab.alpinelinux.org/groups/alpine/-/issues link of the bugtracker. But first search if was already reported.

Are there any details about the releases available?

Yes, please check the Releases page.

How can I contribute?

You can contribute by:

  • Using the software and giving feedback.
  • Documenting your Alpine Linux experiences on this wiki.
  • In many other ways.

Please visit Contribute page to read more about this topic.

Why don't I have man pages or where is the 'man' command?

The man command and man pages are not installed by default.

  • First, install the man-db package:

apk add man-db

  • Once that's done, install the documentation for the packages that you require man pages for:

apk add package-doc

For example, say you installed iptables and you now require its man pages: apk add iptables-doc and then: man iptables. Keep in mind, not all packages will have a corresponding documentation package In our example above, we installed the man pages (and other documentation) for iptables

What is the difference between edge and stable releases?

Stable releases are just what they sound like: initially a point-in-time snapshot of the package archives, but then maintained with bug-fixes only in order to keep a stable environment.

Edge is more of a rolling-release, with the latest and greatest packages available in the online repositories.
Occasionally, snapshot ISO images of the then-current state of edge are made and are available for download.
Typically these are made when there are major kernel upgrades or package upgrades that require initramfs rebuilds.

What architectures does Alpine support?

As Alpine uses the Linux kernel, it supports:

  • x86_64: The popular AMD64 compatible 64-bit x86 based machines, i386 is not recommended for newer/latest hardware.
  • s390x: For the Super powered IBM mainframes, especially IBM Z and IBM LinuxONE servers.
  • ppc64le: For the PowerPC devices with pure little-endian mode, mostly for POWER8 and POWER9
  • x86: (i386 pc 32bit) and x86_64 (i686 pc 64bit and amd64)
  • armhf: The newer ARM hard-float for newer, more powerful 32-bit devices alongside 64-bit
  • armv7: The 32-bit ARM only execution state of the ARMv7 devices machines.
  • aarch64: The 64-bit ARM only execution state of the ARMv8 device machines.
  • ppc64le: for 64-bit big-endian PowerPC and Power ISA processors like some MAC computers.
  • s390x: for Server for IBM Z and LinuxONE mainframes.

Please check Download page for media availability on each one and check Releases pages for latest.

What kind of release of Alpine Linux are available?

Please check the Releases page for more information.

Setup

What is the difference between 'sys', 'data', and 'diskless' when running 'setup-alpine' or 'setup-disk'?

sys: This mode is a traditional disk install. The following partitions will be created on the disk: /boot, / (filesystem root) and swap.
This mode may be used for development boxes, desktops, virtual servers, etc.

data: This mode uses your disk(s) for data storage, not for the operating system. Runs from the media and only /var is created on disk. The system itself will run from tmpfs (RAM). Use this mode if you only want to use the disk(s) for a mailspool, databases, logs, etc.

diskless: No disks are to be used. Alpine local backup may still be used in this mode.

These modes are explained further on the Installation page.

How do I upgrade Alpine?

To upgrade to a new stable release or edge: apk upgrade --available

My cron jobs don't run?

Start service crond and add it to runlevel:

rc-service crond start && rc-update add crond

After that the cron daemon is started automatically on system boot and executes the scripts placed in the folders under /etc/periodic - there's a 15min folder, plus ones for hourly, daily, weekly and monthly scripts.

You can check whether your scripts are likely to run using the command:

run-parts --test /etc/periodic/[foldername]

- for example: run-parts --test /etc/periodic/15min

This command will tell you what should run but will not actually execute the scripts.

If the results of the test are not as expected, check the following:

  • Make sure the script is executable - if unsure, issue the command :

    chmod a+x [scriptname]

  • Make sure the first line of your script is :
    #!/bin/sh
  • Do not put file extensions on your script names - this stops them from working; for example: myscript will run, but myscript.sh won't

Time and timezones

How do I set the local timezone?

Starting in Alpine 2.2, setting the timezone can be done through the setup-alpine script, and no manual settings should be necessary.
If you wish to edit the timezone after installation, run the setup-timezone script.

Packages

Can you build an apk package for ...?

Yes, we probably can.
Please create an issue in the bugtracker. Prefix with "feat" in title and include a short description (one-line), an url for the home page, and an url for the source package.

How can I build my own package?

Please see the Creating an Alpine package page.

What does "required by: world[$pkgname]" mean?

It means that the package you try to install does not exist in the repositories you have configured in /etc/apk/repositories. Maybe you forgot to add community, testing or unmaintained to /etc/apk/repositories?

How can I find out if a certain package exists in Alpine?

If you want to only search repositories you have configured in /etc/apk/repositories, then apk search $pkgname should get you sorted. If you want to search all repositories have a look at the online pkg oracle

WARNING: Ignoring APKINDEX.xxxx.tar.gz

If you get WARNING: Ignoring APKINDEX.xxxx.tar.gz: No such file or directory while running package related tools, check your /etc/apk/repositories file if an entry points to .../v2.4/testing/. This directory is gone.

To check the content of the repositories file

cat /etc/apk/repositories

or

setup-apkrepos

Dynamic DNS

How do I schedule a regular dynamic DNS update?

You'll want to install the ez-ipupdate package:

apk add ez-ipupdate

After that, create a new file at /etc/ez-ipupdate.conf with contents similar to:

service-type=dyndns
user=myusername:mypassword
interface=eth1
host=myhostname.dyndns.org

Make the new ip cache directory:

mkdir /var/cache/ez-ipupdate lbu add /var/cache/ez-ipupdate

Then schedule a new cron job with this command:

echo >> /var/log/ez-ipupdate && \
/bin/date >> /var/log/ez-ipupdate && \
ez-ipupdate --config-file /etc/ez-ipupdate.conf -f -F /var/run/ez-ipupdate.pid \
--cache-file /var/cache/ez-ipupdate/ipcache --quiet >> /var/log/ez-ipupdate 2>&1

Don't forget to backup your settings!

lbu ci

Terminal

How to enable/fix colors for git?

The problem is not in git itself or terminal, but in the less command. Busybox’s less doesn’t support -r (--raw-control-chars) and -R (--RAW-CONTROL-CHARS) options.

The simplest (yet not ideal) solution is to install GNU less:

apk add less

Old questions, no longer freqently asked

Alpine freezes during boot from Compact Flash, how can I fix?

Most Compact Flash card readers do not support proper DMA.
You should append nodma to the append line in syslinux.cfg.

How do I remove the CDROM?

Since the modloop loopback device is on CDROM you cannot just run eject. You need to unmount the modloop first.
Unmounting both the modloop and the CDROM in one step can be done by executing:

/etc/init.d/modloop stop

Then it's possible to eject the CDROM:

eject

How can I install a custom firmware in a diskless system?

The modules and firmware are both special images which are mounted as read-only.
To fix this issue you can copy the firmware directory to your writeable media (cf/usb) and copy your custom firmware to it.
After reboot Alpine should automatically use the directory on your local storage instead of the loopback device.

How do I play my .ogg/.mp3 files?

First, the sound card should be recognized (you must have /dev/snd/***** files)

sox, mpg123, etc all use the oss sound driver, while Alpine uses ALSA drivers.
So you need to load the snd-pcm-oss compatibility module.
While you're at it, you might need aumix to turn up the sound volume

echo snd-pcm-oss >> /etc/modules modprobe snd-pcm-oss apk_add aumix sox aumix (set volume settings) play really_cool_song.mp3

OpenNTPD reports an error with "adjtime"

Your log contains something like:

reply from 85.214.86.126: offset 865033148.784255 delay 0.055466, next query 32s
reply from 202.150.212.24: offset 865033148.779314 delay 0.400771, next query 3s
adjusting local clock by 865033148.779835s                                      
adjtime failed: Invalid argument    

openntpd is supposed to make small adjustments in the time without causing time jumps.
If the adjustment is too big then something is clearly wrong and ntpd gives up. (its actually adjtime(3) that has a limit on how big adjustments are allowed)

You can make ntpd set the time at startup by adding -s option to ntpd. This is done by setting NTPD_OPTS="-s" in /etc/conf.d/ntpd.

Using a cron job to keep the time in sync

Add the following to /etc/periodic/daily (or use another folder under the /etc/periodic heirarchy if you want to run the script more/less frequently)

Example: file called do-ntp

#!/bin/sh
ntpd -d -q -n -p uk.pool.ntp.org

This queries the uk time server pool - you can modify this to suit your localisation, or just use pool.ntp.org. More info here: http://www.pool.ntp.org/zone/@

Windows clients reports an error when trying to sync

openntpd needs to run for a while before it is satisfied it is in sync. Until then it will set a flag "clock not synchronized" and Windows will report an error while trying to sync with your openntpd server.

Only thing to do is wait, do something else for 15-20mins and then check.