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author | Pierre Labastie <pieere@linuxfromscratch.org> | 2019-03-08 13:52:17 +0000 |
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committer | Pierre Labastie <pieere@linuxfromscratch.org> | 2019-03-08 13:52:17 +0000 |
commit | 39fecacfaf2cc18abd0045f40c5da19bb040c3cd (patch) | |
tree | 27b5f66808461763666e475aaa62ce25a07fc087 /chapter07/setclock.xml | |
parent | f0db4f6c3de41fb29b45d9538565f4f043cf7372 (diff) |
Remove obsolete pages from the chapter07 directory:
Those have been included into "usage.xml" or obsoleted for a long time now,
and just clobber the sources.
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@11551 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689
Diffstat (limited to 'chapter07/setclock.xml')
-rw-r--r-- | chapter07/setclock.xml | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/chapter07/setclock.xml b/chapter07/setclock.xml deleted file mode 100644 index 729c447f6..000000000 --- a/chapter07/setclock.xml +++ /dev/null @@ -1,132 +0,0 @@ -<?xml version="1.0" encoding="ISO-8859-1"?> -<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" - "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [ - <!ENTITY % general-entities SYSTEM "../general.ent"> - %general-entities; -]> - -<sect1 id="ch-scripts-clock"> - <?dbhtml filename="clock.html"?> - - <title>Configuring the System Clock</title> - - <para>Procedures for setting the system clock differ between systemd and - System V, however the separate procedures do not conflict so both - procedures should be accomplished to allow switching between systems.</para> - - <sect2 id="ch-scripts-setclock"> - <title>System V Clock Configuration</title> - - <indexterm zone="ch-scripts-setclock"> - <primary sortas="d-setclock">setclock</primary> - <secondary>configuring</secondary></indexterm> - - <para>The <command>setclock</command> script reads the time from the hardware - clock, also known as the BIOS or the Complementary Metal Oxide Semiconductor - (CMOS) clock. If the hardware clock is set to UTC, this script will convert the - hardware clock's time to the local time using the - <filename>/etc/localtime</filename> file (which tells the - <command>hwclock</command> program which timezone the user is in). There is no - way to detect whether or not the hardware clock is set to UTC, so this - needs to be configured manually.</para> - - <para>The <command>setclock</command> is run via - <application>udev</application> when the kernel detects the hardware - capability upon boot. It can also be run manually with the stop parameter to - store the system time to the CMOS clock.</para> - - <para>If you cannot remember whether or not the hardware clock is set to UTC, - find out by running the <userinput>hwclock --localtime --show</userinput> - command. This will display what the current time is according to the hardware - clock. If this time matches whatever your watch says, then the hardware clock is - set to local time. If the output from <command>hwclock</command> is not local - time, chances are it is set to UTC time. Verify this by adding or subtracting - the proper amount of hours for the timezone to the time shown by - <command>hwclock</command>. For example, if you are currently in the MST - timezone, which is also known as GMT -0700, add seven hours to the local - time.</para> - - <para>Change the value of the <envar>UTC</envar> variable below - to a value of <parameter>0</parameter> (zero) if the hardware clock - is <emphasis>not</emphasis> set to UTC time.</para> - - <para>Create a new file <filename>/etc/sysconfig/clock</filename> by running - the following:</para> - -<screen><userinput>cat > /etc/sysconfig/clock << "EOF" -<literal># Begin /etc/sysconfig/clock - -UTC=1 - -# Set this to any options you might need to give to hwclock, -# such as machine hardware clock type for Alphas. -CLOCKPARAMS= - -# End /etc/sysconfig/clock</literal> -EOF</userinput></screen> - - <para>A good hint explaining how to deal with time on LFS is available - at <ulink url="&hints-root;time.txt"/>. It explains issues such as - time zones, UTC, and the <envar>TZ</envar> environment variable.</para> - - <note><para>The CLOCKPARAMS and UTC paramaters may be alternatively set - in the <filename>/etc/sysconfig/rc.site</filename> file.</para></note> - - </sect2> - - <sect2 id="ch-scripts-systemd-clock"> - <title>Systemd Clock Configuration</title> - - <indexterm zone="ch-scripts-clock"> - <primary sortas="d-clock">clock</primary> - <secondary>configuring</secondary></indexterm> - - <para>This section discusses how to configure the - <command>systemd-timedated</command> system service, which configures - system clock and timezone.</para> - - <para><command>systemd-timedated</command> reads - <filename>/etc/adjtime</filename>, and depending on the contents of the file, - it sets the clock to either UTC or local time. Create the - <filename>/etc/adjtime</filename> file with the following contents <emphasis>if your - hardware clock is set to local time</emphasis>:</para> - -<screen role="nodump"><userinput>cat > /etc/adjtime << "EOF" -<literal>0.0 0 0.0 -0 -LOCAL</literal> -EOF</userinput></screen> - - <para>If <filename>/etc/adjtime</filename> isn't present at first boot, - <command>systemd-timedated</command> will assume that hardware clock is - set to UTC and create the file using that setting.</para> - - <para>You can also use the <command>timedatectl</command> utility to tell - <command>systemd-timedated</command> if your hardware clock is set to - UTC or local time:</para> - -<screen role="nodump"><userinput>timedatectl set-local-rtc 1</userinput></screen> - - <para><command>timedatectl</command> can also be used to change system time and - time zone.</para> - - <para>To change your current system time, issue:</para> - -<screen role="nodump"><userinput>timedatectl set-time YYYY:MM:DD HH:MM:SS</userinput></screen> - - <para>Hardware clock will also be updated accordingly.</para> - - <para>To change your current time zone, issue:</para> - -<screen role="nodump"><userinput>timedatectl set-timezone TIMEZONE</userinput></screen> - - <para>You can get list of available time zones by running:</para> - -<screen role="nodump"><userinput>timedatectl list-timezones</userinput></screen> - - <note><para>Please note that <command>timedatectl</command> command can - be used only on a system booted with Systemd.</para></note> - - </sect2> - -</sect1> |