如何实现自动更新?

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百草谷居士
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系统: ubuntu18.04/Win10
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如何实现自动更新?

#1

帖子 百草谷居士 » 2007-12-13 14:05

在ubuntu server版上不想定期的输入:apt-get update;apt-get upgrade来更新系统,能不能让系统自己自动检测更新,自动下载,自动安装呢?

就像windows的自动更新一样。
友帮拓,真难听。有没有接触官方的老大?给改了吧!
一直想找一个在linux下的Visual FoxPro/access桌面数据库。MUIBase还算是最相近的。
1987
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#2

帖子 1987 » 2007-12-14 12:23

看图
附件
Screenshot-软件源.png
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bones7456
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#3

帖子 bones7456 » 2007-12-14 12:27

很好
关注我的blog: ε==3
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百草谷居士
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#4

帖子 百草谷居士 » 2007-12-14 13:19

是server版,没有图形桌面的。
友帮拓,真难听。有没有接触官方的老大?给改了吧!
一直想找一个在linux下的Visual FoxPro/access桌面数据库。MUIBase还算是最相近的。
todaypuzzleme
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#5

帖子 todaypuzzleme » 2007-12-14 14:19

简单,先打开计划任务功能
默认情况下cron是打开的,查看你的/etc/crontab是不是和我的类似:
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

# m h dom mon dow user command
17 * * * * root run-parts --report /etc/cron.hourly
25 6 * * * root test -x /usr/sbin/anacron || run-parts --report /etc/cron.daily
47 6 * * 7 root test -x /usr/sbin/anacron || run-parts --report /etc/cron.weekly
52 6 1 * * root test -x /usr/sbin/anacron || run-parts --report /etc/cron.monthly

将某项任务加到计划来执行有两种方式,一种是直接编译/etc/crontab,按照格式书写命令,一行代表一个命令
或者直接将脚本放置到相应的目录,如每天执行就加到/etc/cron.daily里面;我这边有一个apt的脚本,LZ可以保存为apt后放到该目录下,修改权限为-rwxr-xr-x ,root,root

代码: 全选

#!/bin/sh
#

#set -e
#
# This file understands the following apt configuration variables:
#
#  "APT::Periodic::Update-Package-Lists=1"
#  - Do "apt-get update" automatically every n-days (0=disable)
#   
#  "APT::Periodic::Download-Upgradeable-Packages=0",
#  - Do "apt-get upgrade --download-only" every n-days (0=disable)
#
#  "APT::Periodic::AutocleanInterval"
#  - Do "apt-get autoclean" every n-days (0=disable)
#
#  "APT::Periodic::Unattended-Upgrade"
#  - Run the "unattended-upgrade" security upgrade script
#    every n-days (0=disabled)
#    Requires the package "unattended-upgrades" and will write
#    a log in /var/log/unattended-upgrades
#
#  "APT::Archives::MaxAge",
#  - Set maximum allowed age of a cache package file. If a cache
#    package file is older it is deleted (0=disable)
#
#  "APT::Archives::MaxSize",
#  - Set maximum size of the cache in MB (0=disable). If the cache
#    is bigger, cached package files are deleted until the size
#    requirement is met (the biggest packages will be deleted
#    first).
#
#  "APT::Archives::MinAge"
#  - Set minimum age of a package file. If a file is younger it
#    will not be deleted (0=disable). Usefull to prevent races
#    and to keep backups of the packages for emergency.
#

check_stamp()
{
    stamp="$1"
    interval="$2"

    if [ $interval -eq 0 ]; then
        return 1
    fi

    if [ ! -f $stamp ]; then
        return 0
    fi

    # compare midnight today to midnight the day the stamp was updated
    stamp=$(date --date=$(date -r $stamp --iso-8601) +%s)
    now=$(date --date=$(date --iso-8601) +%s)
    delta=$(($now-$stamp))

    # intervall is in days,
    interval=$(($interval*60*60*24))
    #echo "stampfile: $1"
    #echo "interval=$interval, now=$now, stamp=$stamp, delta=$delta"

    if [ $delta -ge $interval ]; then
        return 0
    fi

    return 1
}

update_stamp()
{
    stamp="$1"

    touch $stamp
}



# we check here if autoclean was enough sizewise
check_size_constraints()
{
    # min-age in days
    MaxAge=0
    MinAge=2
    MaxSize=0
    CacheDir="var/cache/apt"
    CacheArchive="archives/"
    eval $(apt-config shell MaxAge APT::Archives::MaxAge)
    eval $(apt-config shell MinAge APT::Archives::MinAge)
    eval $(apt-config shell MaxSize APT::Archives::MaxSize)
    eval $(apt-config shell Dir Dir)
    eval $(apt-config shell CacheDir Dir::Cache)
    eval $(apt-config shell CacheArchive Dir::Cache::archives)

    # sanity check
    if [ -z "$CacheDir" -o -z "$CacheArchive" ]; then
   echo "empty Dir::Cache or Dir::Cache::archives, exiting"
   exit
    fi
   
    Cache="${Dir%/}/${CacheDir%/}/${CacheArchive%/}/"

    # check age
    if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
   find $Cache -name "*.deb"  \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
    elif [ ! $MaxAge -eq 0 ]; then
   find $Cache -name "*.deb"  -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
    fi
   
    # check size
    if [ ! $MaxSize -eq 0 ]; then
   # maxSize is in MB
   MaxSize=$(($MaxSize*1024))

   #get current time
   now=$(date --date=$(date --iso-8601) +%s)
   MinAge=$(($MinAge*24*60*60))

   # reverse-sort by mtime
   for file in $(ls -rt $Cache/*.deb 2>/dev/null); do
       du=$(du -s $Cache)
       size=${du%%/*}
       # check if the cache is small enough
       if [ $size -lt $MaxSize ]; then
      break
       fi

       # check for MinAge of the file
       if [ ! $MinAge -eq 0 ]; then
      # check both ctime and mtime
      mtime=$(stat -c %Y $file)
      ctime=$(stat -c %Z $file)
      if [ $mtime -gt $ctime ]; then
          delta=$(($now-$mtime))
      else
          delta=$(($now-$ctime))
      fi
      #echo "$file ($delta), $MinAge"
      if [ $delta -le $MinAge ]; then
          #echo "Skiping $file (delta=$delta)"
          break
      fi
       fi

       # delete oldest file
       rm -f $file
   done
    fi
}


UpdateInterval=0
DownloadUpgradeableInterval=0
eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)
AutocleanInterval=$DownloadUpgradeableInterval
eval $(apt-config shell AutocleanInterval APT::Periodic::Autoclean)

UnattendedUpgradeInterval=0
eval $(apt-config shell UnattendedUpgradeInterval APT::Periodic::Unattended-Upgrade)


# laptop check, on_ac_power returns:
#       0 (true)    System is on mains power
#       1 (false)   System is not on mains power
#       255 (false) Power status could not be determined
# Desktop systems always return 255 it seems
if which on_ac_power >/dev/null; then
    on_ac_power
    if [ $? -eq 1 ]; then
   exit 0
    fi
fi

UPDATE_STAMP=/var/lib/apt/periodic/update-stamp
if check_stamp $UPDATE_STAMP $UpdateInterval; then
    if apt-get -qq update 2>/dev/null; then
   if which dbus-send >/dev/null; then
       dbus-send --system / app.apt.dbus.updated boolean:true
   fi
        update_stamp $UPDATE_STAMP
    fi
fi

DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
if check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
    apt-get -qq -d dist-upgrade 2>/dev/null
    update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
fi

AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
    apt-get -qq autoclean
    update_stamp $AUTOCLEAN_STAMP
fi

UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
if check_stamp $UPGRADE_STAMP $UnattendedUpgradeInterval; then
    unattended-upgrade
    update_stamp $UPGRADE_STAMP
fi

# check cache size
check_size_constraints
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