Questions tagged [logs]

Logs are lists of events or information generated by a program or system. They are used for diagnosis as they can contain various useful information to pinpoint the cause of a problem.

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How do we diagnose delays After large number of files are deleted?

A runaway program generated a large number (at least a million?) of files into /var/log. Even after deleting all (?) rogue files, any query on the folder/tree now takes about 5 minutes, and can cause ...
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53 views

How to trouble shoot arbitrary Linux programs

Currently I am trying to become better at using Linux and therefore I would like to know how Linux experts troubleshoot arbitrary programs. On my new laptop I could not burn a cd via k3b. It just got ...
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My Ubuntu box restarted without warning, what log files do I need to examine?

My Ubuntu box restarted without warning, what log files do I need to examine? Specifically,, (1) which log files will tell me what forced a sudden restart? And (2) where do I find them? Update: ...
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Trying to isolate random freezes in Ubuntu 20.04

I'm new to Ubuntu/Linux but an experienced if not expert Windows user. I've set up Ubuntu 20.04 on an older PC with an Asus a8N32-SLI Deluxe (nvidia nforce4 chipset) motherboard and a Radeon HD 7850 ...
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How can I find the MAC address of a host I've connected to in the past?

I need to find the MAC address of a machine that is now offline but cannot be turned on again. (I am trying to wake it up using Wake-on-LAN, but I need its MAC address to do that.) I've connected to ...
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271 views

Search for file by the name it had before being renamed

I have some hundreds of thousands of files, personal stuff like photos, videos and documents gathered and stored during the years. Most of them are organized by type, dates and topics... But some (...
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1answer
282 views

How to fix `Unexpected input report number 128` spam in logs?

My logs are absolutely spammed with this message: logitech-djreceiver 0003:046D:C537.0002: Unexpected input report number 128 I do a Logitech G602 mouse that I use. Is this spam fixable?
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234 views

Ubuntu 20.04 freezes whilst using Teams through Google Chrome browser

I've only just installed Ubuntu 20.04 (around 5 days ago, so pretty clean install) and when I used MS Teams through the browser it was working ok to start with, then about 20 or 30 minutes into the ...
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138 views

Mysql logrotation doesn't work

I'm having trouble making Mysql log rotation working. I don't know why this is so complicated , even though I followed documentation and internet advice, still cannot make it work. I have enabled all ...
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153 views

Random system crash without logs

I built myself a headless Ubuntu server based on Ubuntu 20.04.2 LTS. The system specs are: ryzen 5 1600 (not OC), 16 gb DDR4 3200 Mhz (2x8), msi B450i gaming plus AC (with the lastest BIOS version), ...
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74 views

Why do the following netstat, ps, and auth.log have such output?

I seem to be getting a lot of different connections (ssh) on this Ubuntu server I am sshed into. Are these just brute force attempts? When running netstat -tnpa | grep 'ESTABLISHED.*sshd' why do I get ...
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understanding log messages after installing 20.04 on 2015 vintage macbookair

After installing and updating 20.04 on a late 2015 mac book air I took a look at the log. I just looked at the Important log, and this is what I got: 13:21:20 gdm-session-wor: gkr-pam: unable to ...
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56 views

Are boot log messages anything to be worried about?

Before I log into my system (Ubuntu 20.04 LTS), messages appear on my screen. On further investigation, I find them to be error messages. Here are the messages that appear on my screen before I log in ...
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/var/log/kern.log full of "kernel: [259030.323390] failed hdr12 10 00 00 00 00 00 00 00 00 00 00 01 00 00 00"

I checked my logs today, with journalctl, and lo and behold, my journal is full to the brim with the repeated line below: kernel: [259030.323390] failed hdr12 10 00 00 00 00 00 00 00 00 00 00 01 00 00 ...
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Why does my Ubuntu 20.04 logs show this whenever I boot?

Whenever I switch on my Ubuntu PC, the logs show power: shutdown scheduled for (T - 20.0) seconds
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75 views

how do i enable boot logging on ubuntu?

perhaps its server envy, but I am looking around on a linux server hard drive and saw a file called "bootlog" which holds entries like: boot Sat May 5 02:50:51 2018 shutdown Thu ...
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659 views

How to stop logs filling with "multipath: sdc: can't store path info"

Tried multipath -v2 -d so I can find laptop's integrated card reader wwid and blacklist it (it's /dev/sdc), but nothing returned, just a new line Any ideas how to stop sdc: can't store path info to ...
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Recently installed Ubuntu 20.04 on my machine and I am having some freezing issues

I am new to Ubuntu. The machine seems very unstable and freezes often. It keeps showing up on my logs (see the picture). What does it mean and are there any possible fixes for it? Logs picture:
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Logcheck sent email getting rejected because address is not verified

I am unable to send emails using logcheck as they are getting rejected because email address is not verified. I am using AWS SES and postfix. I see below in the mail log Sep 22 11:30:53 ip-172-112 ...
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164 views

Kernel log file flooded with chromium audit logs

Running Ubuntu 20.04. Today my system suddenly restarted and taking a look at the /var/log/kern.log file I found the following right before the reset: Jul 12 11:59:50 Emperor-Class kernel: [ 1406....
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Gnome-logs important warnings (20.04)

I am rumming 20.04 having upgraded from 19.10. On boot up my Gnome-Log list the following four important warnings: Hardware: pcieport 0000:00:1d.6: AER: [12] Timeout Other: gkr-pam: unable to ...
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66 views

Why dont dpkg logs record software removed as part of the installtion process?

The manifest for the Desktop image of Ubuntu 20.04 is available here. Some of the packages listed in the manifest are removed during the installation process. For example, ubiquity, ubiquity-casper, ...
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Cannot login to my main user. Maybe stuck in some kind of a loop or hit some error

I have ubuntu 18.04. The problem is that i cannot login to my main user account, when i enter my password, it shows a blank black screen with only the mouse cursor and the processor starts making ...
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223 views

what process normally reduces the size of ~./cache/lxsession/Lubuntu/run.log

I ran into a login loop problem caused by the root directory being full, as described in this post. It was caused by the run.log file growing huge, as described in this answer. I found the file ...
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In a log like this: 21-03-2020 07:09 [LOG] ralex /home/ralei/secret ACCESS_WRITE_OK How can i see if the user is the same in both path and log?

So I have a fie of logs like this: 20-03-2020 10:01 [LOG] davis /home/davis/fis1 ACCESS_WRITE_OK 20-03-2020 11:11 [LOG] davis /home/davis/Pictures/cat.png ACCESS_READ_OK 20-03-2020 12:22 [LOG] root /...
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1k views

Ubuntu Laravel storage/logs/cron.log permission denied

I have Ubuntu 18.04, Laravel and PHP7.4. When I do for example command ls I have the list of folders and: user1@bpl:/var/www/html/storage$ ls app framework logs You have new mail in /var/mail/user1 ...
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1answer
133 views

/var/log showing 1TB of 2TB hard Disk

Im relatively new to Ubuntu, please be gentle. System has just crashed while trying to learn Blender. Rebooted machine many times and now it is booting up OK, but I have noticed I have very little ...
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Ubuntu Logs meaning Disconnected, Invalid user and etc. Server attack

Recently installed new server, my first one and almost immediately started to receiving following log, it seems that someone is trying to access my server. Could not find a detailed description about ...
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295 views

what does Ubuntu store under system logs?

what does Ubuntu store under system logs? i found this link https://help.ubuntu.com/community/LinuxLogFiles but is the information on the website accurate?
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Ubuntu makes my computer clear and blank

Today I got the second time a similar problem with my Ubuntu. The first time it was in September, the second one is today. For the first time, it was updated by itself to the new Ubuntu version and ...
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1answer
96 views

How do I found out which process creates a tilde "~" directory in my home folder

Some process keeps creating a directory named ~ in my home folder. How do I find out which process is doing this? I couldn't find anything useful in the syslog. I can use ls -l to find the time it ...
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126 views

Enabling ssh logs on ubuntu system

I want to enable ssh logs on my ubuntu system to monitor actions performed by any ssh connection. My first question is whether i can see these actions in ssh logs and if so then how can i start ssh ...
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172 views

How to see activities performed from WinSCP on ubuntu system

I frequently connect to ubuntu machines from WinSCP to perform some file actions like copying or deleting files. But these actions do not get recorded in any of the logs(Not that i know of) of Ubuntu ...
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2answers
226 views

Terminal command for getting information about the time and user of all the commands executed in all sessions of terminal

I want to know which user executed which command on terminal and when i.e. if any of the user does "rmdir abc" and removes a specific directory , i should know which command he executed and at what ...
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1answer
644 views

How to determine meaning of ras-mc-ctl error messages?

ras-mc-ctl --errors is reporting results like: 661 2019-08-20 08:42:29 -0400 error: corrected filtering (some unreported errors in same region) Generic CACHE Level-3 Generic Error, mcg mcgstatus=0, ...
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1k views

Multiple Processes getting stopped with error "Resource temporarily unavailable" and "can't fork" resulting in crash

We are running a script on Dell Edge gateway 3002 to send data to cloud, but after running for 4-5 days the gateway becomes unresponsive(hanged state) and can't be pinged. The gateway has Ubuntu 18....
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228 views

How to change /var/log/lightdm/lightdm.log timestamp

Is there a way to change the timestamp format for /var/log/lightdm/lightdm.log ? I have lines like this [+391362.52s] DEBUG: Greeter closed communication channel [+391362.52s] DEBUG: Session pid=...
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369 views

Aptana won't launch - error after choosing Workspace folder

I am on Ubuntu Disco 19.04 and have installed Aptana via the .zip file. I've also installed Java via instructions here. When I launch the .exe from my Aptana folder, I get the Splash Screen, then ...
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31 views

Logs not appear

My server today crash and I need know the reason. I look inside dmsg log and verify that has a period of time that I do not have log. Why is is happened? logs
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3answers
5k views

How to add custom fields / tags when I use modules in filebeat to distinguish the origins of log records?

I am using the latest version of ELK Stack and I have Filebeat installed on different servers. I am using different filebeat modules to send the logs. Considering that each module handles a path ...
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1answer
752 views

APCUPSD and "do_IRQ: 3.33 No irq handler for vector"

Logs are filled with error: Jul 21 17:56:36 servername kernel: [ 2883.646823] do_IRQ: 3.33 No irq handler for vector Help! What is this? Its a brand new 18.04 server install on new hardware. I ...
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Ubuntu 19.04 restarts for no apparent reason

My Ubuntu machine restarted while in sleep mode. This has happened once before under similar circumstances, and I'm trying to narrow the cause down. Checking the logs for an hour prior to the reboot ...
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202 views

USB Ports not working in linux

we have multiple systems which are installed on the same way. Now we have a bad situation, ANY USB-Port will not work on two PCs while using ubuntu 18.04.02 server version. The usb ports working fine ...
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257 views

I was hacked? (am I a slave?)

I'm a newbie to Ubuntu Few days back, I noticed a text file named pwn3d.txt on my home folder. The following text was in it: You are (fully) pwn3d due to a homobraphic error on your software ...
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117 views

where commands are logged apart from .bash_history?

I wish I could restrict access to all files where commands are logged. I found these only in .bash_history file located in the home folder. Is there another place?
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1answer
42 views

Massive amount of data being generated somewhere, filling up disk space

Preface: I am running Ubuntu 18.04. I can provide additional information if requested. Somehow, some way my disk is filling up hundreds of gigabytes of empty space in just a few hours entirely on its ...
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1answer
185 views

How to check when system went on battery power

Ubuntu 18.04. Does anybody know if there is a way to check when the system went on battery power? It seems my laptop lost power at some point, went to battery power and died (disabled sleep/suspend ...
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2answers
145 views

How to diagnose the process causing catastrophic failure using digital forensics

Ubuntu 18.04 lsb, I'm trying to figure out the best way to diagnose whats happening when the Amazon Ec2 instance (free tier) hangs. There are experimental services running and there may be / is a ...
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417 views

Getting full logs of sshd failed connections

When I've queried status of my ssh server which has public ip, it states following: user@mypc:~$ sudo systemctl status ssh ● ssh.service - OpenBSD Secure Shell server Loaded: loaded (/lib/systemd/...
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2answers
5k views

How to check when a process stopped running? [duplicate]

I'm trying to figure out when a command I entered stopped executing, for example sudo apt-get update I want information like: started execution at : 12:00 finished execution at : 12:15