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Auteur: Owen
Datum:  
Aan: dng
Onderwerp: Re: [DNG] Clean install of ascii: / is huge ~ 40gb
Thanks to all who replied and especially to "Pontus Goffe via Dng"

One of the many things I didn't know of was "ncdu" (so I installed it via Synaptic").

Apologies for the simplistic ap[proach to writing this back, it's so other newbies like me might understand what to do and how :-)

So the answer is that both /var/log/syslog and /var/log/kern.log are both 18GB large - see details below.

This was an issue reported at the link below so I'm working through that answer:
https://askubuntu.com/questions/515146/very-large-log-files-what-should-i-do

. . . which refers to another answer:
https://stackoverflow.com/questions/35638219/ubuntu-large-syslog-and-kern-log-files

The above answer includes a script to identify by line count of what is filling up the logs. these are it's results on my system:

/var/log/syslog :
42432698  nucdevuan kernel:  ACPI Error: [I*4_] Namespace lookup failure, AE_NOT_FOUND (20160831/psargs-359)
42432692  nucdevuan kernel:  ACPI Exception: AE_NOT_FOUND, while evaluating GPE method [_L66] (20160831/evgpe-646)
42432691  nucdevuan kernel:  ACPI Error: Method parse/execution failed [\_GPE._L66] (Node ffff9be70e1e6988), AE_NOT_FOUND (20160831/psparse-543)
    127  nucdevuan kernel:  random: udevd: uninitialized urandom read (16 bytes read)
    110 .0
     89  nucdevuan CRON: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
     84  nucdevuan kernel:  ACPI: Executed 1 blocks of module-level executable AML code
     84  nucdevuan kernel:  ACPI: Dynamic OEM Table Load:
     68  nucdevuan rtkit-daemon: Supervising 2 threads of 1 processes of 1 users.
     68  nucdevuan dhclient: Sending on   Socket/fallback
/var/log/kern.log :
42432698  nucdevuan kernel:  ACPI Error: [I*4_] Namespace lookup failure, AE_NOT_FOUND (20160831/psargs-359)
42432693  nucdevuan kernel:  ACPI Exception: AE_NOT_FOUND, while evaluating GPE method [_L66] (20160831/evgpe-646)
42432692  nucdevuan kernel:  ACPI Error: Method parse/execution failed [\_GPE._L66] (Node ffff9be70e1e6988), AE_NOT_FOUND (20160831/psparse-543)
    127  nucdevuan kernel:  random: udevd: uninitialized urandom read (16 bytes read)
    110 .0
     84  nucdevuan kernel:  ACPI: Executed 1 blocks of module-level executable AML code
     84  nucdevuan kernel:  ACPI: Dynamic OEM Table Load:
     67  nucdevuan kernel:  IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
     66 .0: System wakeup disabled by ACPI
     63  nucdevuan kernel:  system 00:01: [io  0xffff] has been reserved


Since it's a new install and the log sizes haven't increased by much since I got the system up to date from the install media and wrote my plea for help, it MAY be something that is already fixed in recent updates.

As a quick and dirty hack I just zeroed out the above log files by sending nothing to them, replacing the existing contents:
:/var/log# > syslog
:/var/log# > kern.log

 and will monitor disk usage which is down to a healthy . . . 
$ df
Filesystem                1K-blocks       Used  Available Use% Mounted on
/dev/nvme0n1p4             62244612    4760504   54292512   9% /


The details for anyone interested . . .

The logging is set at the default levels (unchanged from install) and it would seem that they haven't been rolled over since the system was installed on 4/2/20 and today 15/2/20.

My guess is that the files were too big to roll over.

from /etc/logrotate.d# cat rsyslog       (below)


I see that syslog should be rotated every 7 days and kern.log every 4 weeks.


owen@nucdevuan:/$ ncdu -x /

--- / ------------------------------------------------------------------------------------------------------------------
.  34.1 GiB [##########] /var                                                                                           
    3.6 GiB [#         ] /usr



:/var# tree --du

. . .
├── [          9]  lock -> /run/lock
├── [36416792095]  log
│   ├── [      56285]  alternatives.log
│   ├── [     676842]  apt
│   │   ├── [      70524]  eipp.log.xz
│   │   ├── [      93573]  history.log
│   │   └── [     508649]  term.log
│   ├── [     140202]  auth.log
│   ├── [      47520]  bootstrap.log
│   ├── [          0]  btmp
│   ├── [      21456]  ConsoleKit
│   │   └── [      17360]  history
│   ├── [      18404]  cups
│   │   ├── [      11783]  access_log
│   │   ├── [       2525]  error_log
│   │   └── [          0]  page_log
│   ├── [     331812]  daemon.log
│   ├── [     363611]  debug
│   ├── [      52204]  dmesg
│   ├── [      52977]  dmesg.0
│   ├── [      14209]  dmesg.1.gz
│   ├── [    1299392]  dpkg.log
│   ├── [      22221]  exim4
│   │   ├── [      18125]  mainlog
│   │   └── [          0]  paniclog
│   ├── [      32032]  faillog
│   ├── [       3976]  fontconfig.log
│   ├── [       4591]  fsck
│   │   ├── [        297]  checkfs
│   │   └── [        198]  checkroot
│   ├── [       8192]  hp
│   │   └── [       4096]  tmp
│   ├── [18205380792]  kern.log
│   ├── [     292292]  lastlog
│   ├── [       4678]  live
│   │   ├── [        246]  boot.log
│   │   └── [        336]  config.log
│   ├── [       1056]  mail.err
│   ├── [       1056]  mail.info
│   ├── [       1056]  mail.log
│   ├── [       1056]  mail.warn
│   ├── [    1429884]  messages
│   ├── [       4096]  mopidy
│   ├── [      31098]  mpd-sima
│   │   └── [      27002]  mpd-sima.log
│   ├── [       4096]  ntpstats
│   ├── [      37532]  pm-powersave.log
│   ├── [      21075]  refractainstaller.log
│   ├── [       3972]  slim.log
│   ├── [       4096]  speech-dispatcher
│   ├── [18205751941]  syslog
│   ├── [      18341]  user.log
│   ├── [      83722]  wicd
│   │   └── [      79626]  wicd.log
│   ├── [     239232]  wtmp
│   ├── [     303659]  Xorg.0.log
│   └── [      27343]  Xorg.0.log.old
. . . 


:/var/log# ls -al *log
-rw-r--r-- 1 root root       56285 Feb 13 12:33 alternatives.log
-rw-r----- 1 root adm       140202 Feb 15 10:36 auth.log
-rw-r--r-- 1 root root       47520 Sep 20 13:21 bootstrap.log
-rw-r----- 1 root adm       331812 Feb 15 10:26 daemon.log
-rw-r--r-- 1 root root     1299392 Feb 15 10:31 dpkg.log
-rw-r--r-- 1 root root       32032 Feb  7 13:52 faillog
-rw-r--r-- 1 root root        3976 Feb  7 13:52 fontconfig.log
-rw-r----- 1 root adm  18205380792 Feb 14 16:38 kern.log
-rw-rw-r-- 1 root utmp      292292 Feb  7 13:52 lastlog
-rw-r----- 1 root adm         1056 Feb 13 10:07 mail.log
-rw-r--r-- 1 root root       37532 Feb 14 16:38 pm-powersave.log
-rw-r--r-- 1 root root       21075 Feb  5 11:00 refractainstaller.log
-rw-r--r-- 1 root root        3972 Feb 14 16:38 slim.log
-rw-r----- 1 root adm  18205751941 Feb 15 10:26 syslog
-rw-r----- 1 root adm        18341 Feb 13 21:30 user.log
-rw-r--r-- 1 root root      303659 Feb 15 10:15 Xorg.0.log



:/var/log# more syslog
Feb  4 23:50:03 devuan liblogging-stdlog:  [origin software="rsyslogd" swVersion="8.24.0" x-pid="2029" x-info="http://ww
w.rsyslog.com"] start
Feb  4 23:50:03 devuan kernel: [    0.000000] Linux version 4.9.0-11-amd64 (debian-kernel@???) (gcc version
 6.3.0 20170516 (Debian 6.3.0-18+deb9u1) ) #1 SMP Debian 4.9.189-3 (2019-09-02)
Feb  4 23:50:03 devuan kernel: [    0.000000] Command line: BOOT_IMAGE=/live/vmlinuz boot=live username=devuan
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registers'
. . .
:/var/log# tail syslog
Feb 15 06:17:01 nucdevuan CRON[20099]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Feb 15 06:25:01 nucdevuan CRON[20265]: (root) CMD (test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily ))
Feb 15 07:17:01 nucdevuan CRON[21283]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Feb 15 07:30:01 nucdevuan CRON[21534]: (root) CMD ([ -x /etc/init.d/anacron ] && if [ ! -d /run/systemd/system ]; then /usr/sbin/invoke-rc.d anacron start >/dev/null; fi)
Feb 15 08:17:01 nucdevuan CRON[22476]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Feb 15 09:17:01 nucdevuan CRON[23644]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Feb 15 10:17:01 nucdevuan CRON[24870]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Feb 15 10:26:06 nucdevuan dbus[1928]: [system] Activating service name='org.freedesktop.PackageKit' (using servicehelper)


:/var/log# more kern.log
Feb  4 23:50:03 devuan kernel: [    0.000000] Linux version 4.9.0-11-amd64 (debian-kernel@???) (gcc version
 6.3.0 20170516 (Debian 6.3.0-18+deb9u1) ) #1 SMP Debian 4.9.189-3 (2019-09-02)
Feb  4 23:50:03 devuan kernel: [    0.000000] Command line: BOOT_IMAGE=/live/vmlinuz boot=live username=devuan
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers'
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers'
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: Supporting XSAVE feature 0x004: 'AVX registers'
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: Supporting XSAVE feature 0x008: 'MPX bounds registers'
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: Supporting XSAVE feature 0x010: 'MPX CSR'
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: xstate_offset[2]:  576, xstate_sizes[2]:  256
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: xstate_offset[3]:  832, xstate_sizes[3]:   64
Feb  4 23:50:03 devuan kernel: [    0.000000] x86/fpu: xstate_offset[4]:  896, xstate_sizes[4]:   64
. . .


:/var/log# tail kern.log
Feb 14 16:38:36 nucdevuan kernel: [ 12.241603] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Feb 14 16:38:39 nucdevuan kernel: [ 15.104057] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
Feb 14 16:38:39 nucdevuan kernel: [ 15.104102] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
Feb 14 16:38:41 nucdevuan kernel: [ 17.310572] e1000e: eth0 NIC Link is Down
Feb 14 16:38:41 nucdevuan kernel: [ 17.408751] e1000e 0000:00:1f.6: Failed to restore TIMINCA clock rate delta: -22
Feb 14 16:38:41 nucdevuan kernel: [ 17.537606] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Feb 14 16:38:41 nucdevuan kernel: [ 17.664285] e1000e: eth0 NIC Link is Down
Feb 14 16:38:41 nucdevuan kernel: [ 17.933729] IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Feb 14 16:38:45 nucdevuan kernel: [ 21.056197] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx
Feb 14 16:38:45 nucdevuan kernel: [ 21.056256] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

:/etc/logrotate.d# cat rsyslog
/var/log/syslog
{
    rotate 7
    daily
    missingok
    notifempty
    delaycompress
    compress
    postrotate
        invoke-rc.d rsyslog rotate > /dev/null
    endscript
}


/var/log/mail.info
/var/log/mail.warn
/var/log/mail.err
/var/log/mail.log
/var/log/daemon.log
/var/log/kern.log
/var/log/auth.log
/var/log/user.log
/var/log/lpr.log
/var/log/cron.log
/var/log/debug
/var/log/messages
{
    rotate 4
    weekly
. . .


Thanks again to all who responded.

--
Owen

On Thu, 13 Feb 2020, at 07:41, Joril via Dng wrote:
> On 13/02/20 03:26, Owen wrote:
>
> > Any ideas how I can reclaim 30gb of my disk space please?
>
> You could try looking for huge directories with ncdu
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