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[apt.git] / debian / apt.cron.daily

diff --git a/debian/apt.cron.daily b/debian/apt.cron.daily
index ee0761bfbd7e1d9ecd3bbd1fdb5fd1553e22abc2..d3c9e04c140c603bf35de73ddf8c9ea61f9dd90c 100644 (file)
--- a/debian/apt.cron.daily
+++ b/debian/apt.cron.daily
@@ -3,7 +3,7 @@
 #
 # This file understands the following apt configuration variables:
 # Values here are the default.
-# Create /etc/apt/apt.conf.d/02periodic file to set your preference.
+# Create /etc/apt/apt.conf.d/10periodic file to set your preference.
 #
 #  Dir "/";
 #  - RootDir for all configuration files
@@ -68,6 +68,19 @@
 #      1:  progress report       (actually any string)
 #      2:  + command outputs     (remove -qq, remove 2>/dev/null, add -d)
 #      3:  + trace on            
+#
+#  APT::Periodic::RandomSleep "1800";
+#  - The apt cron job will delay its execution by a random
+#    time span between zero and 'APT::Periodic::RandomSleep'
+#    seconds.
+#    This is done because otherwise everyone would access the
+#    mirror servers at the same time and put them collectively
+#    under very high strain.
+#    You can set this to '0' if you are using a local mirror and
+#    do not care about the load spikes.
+#    Note that sleeping in the apt job will be delaying the
+#    execution of all subsequent cron.daily jobs.
+#
 
 check_stamp()
 {
@@ -311,7 +324,7 @@ check_power(){
     #       1 (false)   System is not on main power
     #       255 (false) Power status could not be determined
     # Desktop systems always return 255 it seems
-    if which on_ac_power >/dev/null; then
+    if which on_ac_power >/dev/null 2>&1; then
         on_ac_power
         POWER=$?
         if [ $POWER -eq 1 ]; then
@@ -339,7 +352,7 @@ if test -r /var/lib/apt/extended_states; then
 fi
 
 # check apt-config existence
-if ! which apt-config >/dev/null ; then
+if ! which apt-config >/dev/null 2>&1; then
        exit 0
 fi
 
@@ -375,7 +388,7 @@ fi
 check_power || exit 0
 
 # check if we can lock the cache and if the cache is clean
-if which apt-get >/dev/null && ! eval apt-get check $XAPTOPT $XSTDERR ; then
+if which apt-get >/dev/null 2>&1 && ! eval apt-get check $XAPTOPT $XSTDERR ; then
     debug_echo "error encountered in cron job with \"apt-get check\"."
     exit 0
 fi
@@ -438,7 +451,7 @@ UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
 if check_stamp $UPDATE_STAMP $UpdateInterval; then
     if eval apt-get $XAPTOPT -y update $XSTDERR; then
        debug_echo "download updated metadata (success)."
-       if which dbus-send >/dev/null && pidof dbus-daemon >/dev/null; then
+       if which dbus-send >/dev/null 2>&1 && pidof dbus-daemon >/dev/null 2>&1; then
            if dbus-send --system / app.apt.dbus.updated boolean:true ; then
                debug_echo "send dbus signal (success)"
            else
@@ -474,7 +487,7 @@ fi
 
 # auto upgrade all upgradeable packages
 UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
-if which unattended-upgrade >/dev/null && check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
+if which unattended-upgrade >/dev/null 2>&1 && check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
     if unattended-upgrade $XUUPOPT; then
        update_stamp $UPGRADE_STAMP
        debug_echo "unattended-upgrade (success)"