apt-get clean automatically question

[LanceM]

Mint 19.3 Cinnamon
Is there a way to get

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apt-get clean

to run automatically after a certain size is reached or amount of time goes by? It sure would be handy for newbies that I have installed Mint on their machines.

[JerryF]

I think setting up a cron task may be what you need. I'm not familiar with this, but here's something about it:

https://www.tecmint.com/create-and-mana ... -on-linux/

[karlchen]

Hello, LanceM.

By default Linux Mint 19.3 purges all download files from the directory /var/cache/apt/archives/ 7 days, after they have been downloaded there by the software management system (apt, Software Manager, Update Manager).
Therefore I wonder a bit, why running an extra "(sudo) apt-get clean" regularly should be necessary.

Best regards,
Karl

[LanceM]

Hello, LanceM.

By default Linux Mint 19.3 purges all download files from the directory /var/cache/apt/archives/ 7 days, after they have been downloaded there by the software management system (apt, Software Manager, Update Manager).
Therefore I wonder a bit, why running an extra "apt clean" regularly should be necessary.

Best regards,
Karl

When I run

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sudo du -sh /var/cache/apt/

it gets bigger as time goes by. Easily reaches several hundred MB in a month. It goes to zero after running

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sudo apt-get clean

[karlchen]

Hi, LanceM.

I know what the commandline sudo apt-get clean does.
Yet, the space of /var/cache/apt/archives/ should not grow indefinitely, because Mint 19.3 has got a job which takes care of cleaning up /var/cache/apt/archives/ by deleting anything from /var/cache/apt/archives/, which was downloaded for installation more than 7 days ago. (7 days is the default grace period).
In case this cleanup does not happen on your system, maybe you have switched it of unknowingly?

Best regards,
Karl

[LanceM]

Hi, LanceM.

I know what the commandline sudo apt-get clean does.
Yet, the space of /var/cache/apt/archives/ should not grow indefinitely, because Mint 19.3 has got a job which takes care of cleaning up /var/cache/apt/archives/ by deleting anything from /var/cache/apt/archives/, which was downloaded for installation more than 7 days ago. (7 days is the default grace period).
In case this cleanup does not happen on your system, maybe you have switched it of unknowingly?

Best regards,
Karl

How can I verify? I certainly haven't done that intentionally.

[karlchen]

There is the configuration file /etc/apt/apt.conf.d/90mintsystem.
The content of the file here on my system is:

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APT::Archives::MaxAge "30";
APT::Archives::MinAge "2";
APT::Archives::MaxSize "500";

The Mint default would be

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APT::Archives::MaxAge "7";
APT::Archives::MinAge "2";
APT::Archives::MaxSize "500";

It is read by an automatic apt job, which runs once per day.
MaxAge: delete files, downloaded more than 7 days ago.
MinAge: never delete files, downloaded less than 2 days ago
MaxSize: space occupied by /var/cache/apt/archives/ should not exceed 500 MB.

The ap cleanup job tries to keep the occupied space below MaxSize by deleting files, downloaded 7 days ago or more. In case this is not sufficient, younger files may be deleted as well, but never files, downloaded less than MinAge days ago.

[LanceM]

Mine says that. So I'm good. I think I probably see it when I'm around 500M and assumed it kept growing. I called a fellow that has not run the clean command since I put 19.3 on his laptop months ago, and his was only 373M. Can it be made to be smaller by doing an edit to that file. Something like 200M?

[karlchen]

Hi, LanceM.

Yes. The file can be edited with root permissions.
Command to edit
+ either sudoedit /etc/apt/apt.conf.d/90mintsystem
+ or xed admin:///etc/apt/apt.conf.d/90mintsystem

Change the line APT::Archives::MaxSize "500"; to read APT::Archives::MaxSize "200"; because MaxSize is the maximum size in MB.

Karl

[LanceM]

I did the edit and set to "125". I restarted the PC and checked. It's still 197M
Is there another trigger to set, or will it run later today or tomorrow?

[karlchen]

I am not logged in on LM 19.3 at the moment, but on LM 18.1.
I am not quite sure that the service, which does the apt cache cleanup, has got the same name on LM 18.1 and on LM 19.3.
Therefore I would prefer checking on LM 19.3 first.

But I can confirm that sometimes I, too, had the impression as if the cleanup were not done in a timely fashion, just to find out some time later on the same day that /var/cache/apt/archives occupied much less space in the evening than it had done in the morning.

[LanceM]

Therefore I would prefer checking on LM 19.3 first.

Much appreciated!

[LanceM]

Therefore I would prefer checking on LM 19.3 first.

Have you had a chance to check on that? The size I set has not yet happened.
Thanks!

[smurphos]

I'm pretty sure it's the apt-daily.service that as part of it's routine will check if cache constraints have been exceeded.

What does the command this return run in a terminal

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systemctl status apt-daily.service

Looking at the actual script that's run by the service - /usr/lib/apt/apt.systemd.daily, it appears even if the cache exceeds the MaxSize it will only delete archived packages with a creation date older that the MinAge.

[LanceM]

What does the command this return run in a terminal

This is on a system that just has a fresh install (new AMD machine) and no apt settings have been done.

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lance@LM:~$ systemctl status apt-daily.service
● apt-daily.service - Daily apt download activities
   Loaded: loaded (/lib/systemd/system/apt-daily.service; static; vendor preset:
   Active: inactive (dead)
     Docs: man:apt(8)

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#!/bin/sh
#set -e
#
# This file understands the following apt configuration variables:
# Values here are the default.
# Create /etc/apt/apt.conf.d/10periodic file to set your preference.
#
#  Dir "/";
#  - RootDir for all configuration files
#
#  Dir::Cache "var/cache/apt/";
#  - Set apt package cache directory
#
#  Dir::Cache::Archives "archives/";
#  - Set package archive directory
#
#  APT::Periodic::Enable "1";
#  - Enable the update/upgrade script (0=disable)
#
#  APT::Periodic::BackupArchiveInterval "0";
#  - Backup after n-days if archive contents changed.(0=disable)
#
#  APT::Periodic::BackupLevel "3";
#  - Backup level.(0=disable), 1 is invalid.
#
#  Dir::Cache::Backup "backup/";
#  - Set periodic package backup directory
#
#  APT::Archives::MaxAge "0"; (old, deprecated)
#  APT::Periodic::MaxAge "0"; (new)
#  - Set maximum allowed age of a cache package file. If a cache 
#    package file is older it is deleted (0=disable)
#
#  APT::Archives::MinAge "2"; (old, deprecated)
#  APT::Periodic::MinAge "2"; (new)
#  - Set minimum age of a package file. If a file is younger it
#    will not be deleted (0=disable). Useful to prevent races
#    and to keep backups of the packages for emergency.
#
#  APT::Archives::MaxSize "0"; (old, deprecated)
#  APT::Periodic::MaxSize "0"; (new)
#  - 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 oldest packages will be deleted 
#    first).
#
#  APT::Periodic::Update-Package-Lists "0";
#  - 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::Download-Upgradeable-Packages-Debdelta "1";
#  - Use debdelta-upgrade to download updates if available (0=disable)
#
#  APT::Periodic::Unattended-Upgrade "0";
#  - 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::Periodic::AutocleanInterval "0";
#  - Do "apt-get autoclean" every n-days (0=disable)
#
#  APT::Periodic::CleanInterval "0";
#  - Do "apt-get clean" every n-days (0=disable)
#
#  APT::Periodic::Verbose "0";
#  - Send report mail to root
#      0:  no report             (or null string)
#      1:  progress report       (actually any string)
#      2:  + command outputs     (remove -qq, remove 2>/dev/null, add -d)
#      3:  + trace on            
#

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

    if [ "$interval" = always ]; then
	debug_echo "check_stamp: ignoring time stamp file, interval set to always"
	# treat as enough time has passed
        return 0
    fi

    if [ "$interval" -eq 0 ]; then
	debug_echo "check_stamp: interval=0"
	# treat as no time has passed
        return 1
    fi

    if [ ! -f "$stamp" ]; then
	debug_echo "check_stamp: missing time stamp file: $stamp."
	# treat as enough time has passed
        return 0
    fi

    # compare midnight today to midnight the day the stamp was updated
    stamp_file="$stamp"
    stamp=$(date --date="$(date -r "$stamp_file" --iso-8601)" +%s 2>/dev/null)
    if [ "$?" != "0" ]; then
        # Due to some timezones returning 'invalid date' for midnight on
        # certain dates (e.g. America/Sao_Paulo), if date returns with error
        # remove the stamp file and return 0. See coreutils bug:
        # http://lists.gnu.org/archive/html/bug-coreutils/2007-09/msg00176.html
        rm -f "$stamp_file"
        return 0
    fi

    now=$(date --date="$(date --iso-8601)" +%s 2>/dev/null)
    if [ "$?" != "0" ]; then
        # As above, due to some timezones returning 'invalid date' for midnight
        # on certain dates (e.g. America/Sao_Paulo), if date returns with error
        # return 0.
        return 0
    fi

    delta=$((now-stamp))

    # Calculate the interval in seconds depending on the unit specified
    if [ "${interval%s}" != "$interval" ] ; then
        interval="${interval%s}"
    elif [ "${interval%m}" != "$interval" ] ; then
        interval="${interval%m}"
        interval=$((interval*60))
    elif [ "${interval%h}" != "$interval" ] ; then
        interval="${interval%h}"
        interval=$((interval*60*60))
    else
        interval="${interval%d}"
        interval=$((interval*60*60*24))
    fi

    debug_echo "check_stamp: interval=$interval, now=$now, stamp=$stamp, delta=$delta (sec)"

    # remove timestamps a day (or more) in the future and force re-check
    if [ "$stamp" -gt $((now+86400)) ]; then
         echo "WARNING: file $stamp_file has a timestamp in the future: $stamp"
         rm -f "$stamp_file"
         return 0
    fi

    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()
{
    MaxAge=0
    eval $(apt-config shell MaxAge APT::Archives::MaxAge)
    eval $(apt-config shell MaxAge APT::Periodic::MaxAge)

    MinAge=2
    eval $(apt-config shell MinAge APT::Archives::MinAge)
    eval $(apt-config shell MinAge APT::Periodic::MinAge)

    MaxSize=0
    eval $(apt-config shell MaxSize APT::Archives::MaxSize)
    eval $(apt-config shell MaxSize APT::Periodic::MaxSize)

    Cache="/var/cache/apt/archives/"
    eval $(apt-config shell Cache Dir::Cache::archives/d)

    # sanity check
    if [ -z "$Cache" ]; then
	echo "empty Dir::Cache::archives, exiting"
	exit
    fi

    # check age
    if [ ! $MaxAge -eq 0 ] && [ ! $MinAge -eq 0 ]; then
	debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge and ctime>$MinAge and mtime>$MinAge"
	find $Cache -name "*.deb"  \( -mtime +$MaxAge -and -ctime +$MaxAge \) -and -not \( -mtime -$MinAge -or -ctime -$MinAge \) -print0 | xargs -r -0 rm -f
    elif [ ! $MaxAge -eq 0 ]; then
	debug_echo "aged: ctime <$MaxAge and mtime <$MaxAge only"
	find $Cache -name "*.deb"  -ctime +$MaxAge -and -mtime +$MaxAge -print0 | xargs -r -0 rm -f
    else
	debug_echo "skip aging since MaxAge is 0"
    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 $MaxSize ]; then
		debug_echo "end remove by archive size:  size=$size < $MaxSize"
		break
	    fi

	    # check for MinAge of the file
	    if [ $MinAge -ne 0 ]; then 
		# check both ctime and mtime 
		mtime=$(stat -c %Y "$file")
		ctime=$(stat -c %Z "$file")
		if [ "$mtime" -gt "$ctime" ]; then
		    delta=$((now-mtime))
		else
		    delta=$((now-ctime))
		fi
		if [ $delta -le $MinAge ]; then
		    debug_echo "skip remove by archive size:  $file, delta=$delta < $MinAge"
		    break
		else
		    # delete oldest file
		    debug_echo "remove by archive size: $file, delta=$delta >= $MinAge (sec), size=$size >= $MaxSize"
		    rm -f "$file"
		fi
	    fi
	done
    fi
}

# deal with the Apt::Periodic::BackupArchiveInterval
do_cache_backup()
{
    BackupArchiveInterval="$1"
    if [ "$BackupArchiveInterval" = always ]; then
        :
    elif [ "$BackupArchiveInterval" -eq 0 ]; then
        return
    fi

    # Set default values and normalize
    CacheDir="/var/cache/apt"
    eval $(apt-config shell CacheDir Dir::Cache/d)
    CacheDir=${CacheDir%/}
    if [ -z "$CacheDir" ]; then
	debug_echo "practically empty Dir::Cache, exiting"
	return 0
    fi

    Cache="${CacheDir}/archives/"
    eval $(apt-config shell Cache Dir::Cache::Archives/d)
    if [ -z "$Cache" ]; then
	debug_echo "practically empty Dir::Cache::archives, exiting"
	return 0
    fi

    BackupLevel=3
    eval $(apt-config shell BackupLevel APT::Periodic::BackupLevel)
    if [ $BackupLevel -le 1 ]; then 
	BackupLevel=2 ; 
    fi
    
    Back="${CacheDir}/backup/"
    eval $(apt-config shell Back Dir::Cache::Backup/d)
    if [ -z "$Back" ]; then
	echo "practically empty Dir::Cache::Backup, exiting" 1>&2
	return
    fi

    CacheArchive="$(basename "${Cache}")"
    test -n "${CacheArchive}" || CacheArchive="archives"
    BackX="${Back}${CacheArchive}/"
    for x in $(seq 0 1 $((BackupLevel-1))); do
	eval "Back${x}=${Back}${x}/"
    done
    
    # backup after n-days if archive contents changed.
    # (This uses hardlink to save disk space)
    BACKUP_ARCHIVE_STAMP=/var/lib/apt/periodic/backup-archive-stamp
    if check_stamp $BACKUP_ARCHIVE_STAMP "$BackupArchiveInterval"; then
	if [ $({ (cd $Cache 2>/dev/null; find . -name "*.deb"); (cd $Back0 2>/dev/null;find . -name "*.deb") ;}| sort|uniq -u|wc -l) -ne 0 ]; then
	    mkdir -p $Back
	    rm -rf $Back$((BackupLevel-1))
	    for y in $(seq $((BackupLevel-1)) -1 1); do
		eval BackY=${Back}$y
		eval BackZ=${Back}$((y-1))
		if [ -e $BackZ ]; then 
		    mv -f $BackZ $BackY ; 
		fi
	    done
	    cp -la $Cache $Back ; mv -f $BackX $Back0
	    update_stamp $BACKUP_ARCHIVE_STAMP
	    debug_echo "backup with hardlinks. (success)"
	else
	    debug_echo "skip backup since same content."
	fi
    else
	debug_echo "skip backup since too new."
    fi
}

debug_echo()
{
    # Display message if $VERBOSE >= 1
    if [ "$VERBOSE" -ge 1 ]; then
        echo "$1" 1>&2
    fi
}

# ------------------------ main ----------------------------
if [ "$1" = "lock_is_held" ]; then
    shift
else
    # Maintain a lock on fd 3, so we can't run the script twice at the same
    # time.
    eval $(apt-config shell StateDir Dir::State/d)
    exec 3>${StateDir}/daily_lock
    if ! flock -w 3600 3; then
        echo "E: Could not acquire lock" >&2
        exit 1
    fi

    # We hold the lock.  Rerun this script as a child process, which
    # can run without propagating an extra fd to all of its children.
    "$0" lock_is_held "$@" 3>&-
    exit $?
fi

if test -r /var/lib/apt/extended_states; then
    # Backup the 7 last versions of APT's extended_states file
    # shameless copy from dpkg cron
    if cd /var/backups ; then
	if ! cmp -s apt.extended_states.0 /var/lib/apt/extended_states; then
	    cp -p /var/lib/apt/extended_states apt.extended_states
	    savelog -c 7 apt.extended_states >/dev/null
	fi
    fi
fi

# check apt-config existence
if ! which apt-config >/dev/null 2>&1; then
	exit 0
fi

# check if the user really wants to do something
AutoAptEnable=1  # default is yes
eval $(apt-config shell AutoAptEnable APT::Periodic::Enable)

if [ $AutoAptEnable -eq 0 ]; then
    exit 0
fi

# Set VERBOSE mode from  apt-config (or inherit from environment)
VERBOSE=0
eval $(apt-config shell VERBOSE APT::Periodic::Verbose)
debug_echo "verbose level $VERBOSE"
if [ "$VERBOSE" -le 1 ]; then
    # quiet for 0/1
    XSTDOUT=">/dev/null"
    XSTDERR="2>/dev/null"
    XAPTOPT="-qq"
    XUUPOPT=""
else
    XSTDOUT=""
    XSTDERR=""
    XAPTOPT=""
    XUUPOPT="-d"
fi
if [ "$VERBOSE" -ge 3 ]; then
    # trace output
    set -x
fi

# check if we can lock the cache and if the cache is clean
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

# Global current time in seconds since 1970-01-01 00:00:00 UTC
now=$(date +%s)

# Support old Archive for compatibility.
# Document only Periodic for all controlling parameters of this script.

UpdateInterval=0
eval $(apt-config shell UpdateInterval APT::Periodic::Update-Package-Lists)

DownloadUpgradeableInterval=0
eval $(apt-config shell DownloadUpgradeableInterval APT::Periodic::Download-Upgradeable-Packages)

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

AutocleanInterval=0
eval $(apt-config shell AutocleanInterval APT::Periodic::AutocleanInterval)

CleanInterval=0
eval $(apt-config shell CleanInterval APT::Periodic::CleanInterval)

BackupArchiveInterval=0
eval $(apt-config shell BackupArchiveInterval APT::Periodic::BackupArchiveInterval)

Debdelta=1
eval $(apt-config shell Debdelta APT::Periodic::Download-Upgradeable-Packages-Debdelta)

# check if we actually have to do anything that requires locking the cache
if [ $UpdateInterval = always ] ||
   [ $DownloadUpgradeableInterval = always ] ||
   [ $UnattendedUpgradeInterval = always ] ||
   [ $BackupArchiveInterval = always ] ||
   [ $AutocleanInterval = always ] ||
   [ $CleanInterval = always ] ; then
    :
elif [ $UpdateInterval -eq 0 ] &&
     [ $DownloadUpgradeableInterval -eq 0 ] &&
     [ $UnattendedUpgradeInterval -eq 0 ] &&
     [ $BackupArchiveInterval -eq 0 ] &&
     [ $AutocleanInterval -eq 0 ] &&
     [ $CleanInterval -eq 0 ] ; then

    # check cache size
    check_size_constraints

    exit 0
fi

if [ "$1" = "update" ] || [ -z "$1" ] ; then
    # deal with BackupArchiveInterval
    do_cache_backup $BackupArchiveInterval

    # include default system language so that "apt-get update" will
    # fetch the right translated package descriptions
    if [ -r /etc/default/locale ]; then
	. /etc/default/locale
	export LANG LANGUAGE LC_MESSAGES LC_ALL
    fi

    # update package lists
    UPDATED=0
    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)."
	    update_stamp $UPDATE_STAMP
	    UPDATED=1
	else
	    debug_echo "download updated metadata (error)"
	fi
    else
	debug_echo "download updated metadata (not run)."
    fi
	    
    # download all upgradeable packages (if it is requested)
    DOWNLOAD_UPGRADEABLE_STAMP=/var/lib/apt/periodic/download-upgradeable-stamp
    if [ $UPDATED -eq 1 ] && check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $DownloadUpgradeableInterval; then
	if [ $Debdelta -eq 1 ]; then
	    debdelta-upgrade >/dev/null 2>&1 || true
	fi
	if  eval apt-get $XAPTOPT -y -d dist-upgrade $XSTDERR; then
	    update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
	    debug_echo "download upgradable (success)"
	else
	    debug_echo "download upgradable (error)"
	fi
    else
	debug_echo "download upgradable (not run)"
    fi

    if which unattended-upgrade >/dev/null 2>&1 && unattended-upgrade --help | grep -q download-only && check_stamp $DOWNLOAD_UPGRADEABLE_STAMP $UnattendedUpgradeInterval; then
	if unattended-upgrade --download-only $XUUPOPT; then
	    update_stamp $DOWNLOAD_UPGRADEABLE_STAMP
	    debug_echo "unattended-upgrade -d (success)"
	else
	    debug_echo "unattended-upgrade -d (error)"
	fi
    else
	debug_echo "unattended-upgrade -d (not run)"
    fi
fi

if [ "$1" = "install" ] || [ -z "$1" ] ; then
    # auto upgrade all upgradeable packages
    UPGRADE_STAMP=/var/lib/apt/periodic/upgrade-stamp
    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)"
	else
	    debug_echo "unattended-upgrade (error)"
	fi
    else
	debug_echo "unattended-upgrade (not run)"
    fi

    # clean package archive
    CLEAN_STAMP=/var/lib/apt/periodic/clean-stamp
    if check_stamp $CLEAN_STAMP $CleanInterval; then
	if  eval apt-get $XAPTOPT -y clean $XSTDERR; then
	    debug_echo "clean (success)."
	    update_stamp $CLEAN_STAMP
	else
	    debug_echo "clean (error)"
	fi
    else
	debug_echo "clean (not run)"
    fi

    # autoclean package archive
    AUTOCLEAN_STAMP=/var/lib/apt/periodic/autoclean-stamp
    if check_stamp $AUTOCLEAN_STAMP $AutocleanInterval; then
	if  eval apt-get $XAPTOPT -y autoclean $XSTDERR; then
	    debug_echo "autoclean (success)."
	    update_stamp $AUTOCLEAN_STAMP
	else
	    debug_echo "autoclean (error)"
	fi
    else
	debug_echo "autoclean (not run)"
    fi

    # check cache size 
    check_size_constraints
fi

#
#     vim: set sts=4 ai :
#

[smurphos]

Check again after 24 hours or run

Code: Select all

journalctl -u apt-daily

[LanceM]

Check again after 24 hours or run

This is today

Code: Select all

~$ journalctl -u apt-daily
-- Logs begin at Tue 2020-02-18 09:13:44 MST, end at Wed 2020-02-19 09:36:25 MST
Feb 18 21:50:06 LM systemd[1]: Starting Daily apt download activities...
Feb 18 21:50:17 LM systemd[1]: Started Daily apt download activities.

[smurphos]

So it has run week ago or so.

One thing I should mention - apt-daily will exit without taking any action if the device is running on battery.

[LanceM]

So it has run week ago or so.

One thing I should mention - apt-daily will exit without taking any action if the device is running on battery.

No batteries here, just Desktop PCs. I have a nice laptop with Mint Cinnamon 19.3, but rarely use it.