A log is a record of events during a particular time range. Questions about interpreting logs on Ubuntu or controlling logging.

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How to change DHCP Server log location

I have a running DHCP server and I would like to change the location of the log file to /var/etc/dhcpd.log I have found this in the dhcpd.conf file: #Use this to send dhcp log messages to a ...
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10 views

How to check crash log of qtcreator?

My qtcreator 3.0.1 randomly crashes.How can I view logs of it, to look for future solutions?
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44 views

files where break-in attempts are logged

Ubuntu Server with Apache, hosting multiple websites and mail-servers. Besides /var/log/auth.log, are there other places where break-in attempts are logged? Context: I used to have a lot of break-in ...
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Location of account-specific log files

Where do I store log files for stuff specific to a particular account, like say a backup of its home directory? /var/log/ seems to be for stuff common to the whole system or components that aren't ...
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Log Analysis…How To [duplicate]

How do I find out information about logs that are in a file on my desktop called "logs," such as what application from which they were created, the sizes of the exports logged, what the most common ...
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146 views

syslog doesn't exist!

I use 14.04 and I don't have syslog. I'm a fresh user of Linux, being Windows user for years. When I try tail syslog and that's what out: henrique@henrique:/var/log$ tail -f /var/log/syslog tail: ...
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2answers
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system log question- auth.log

I'm pretty new here. I was looking at my system logs and noticed this: Jul 21 00:57:47 htpc sshd[13001]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= ...
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32 views

Extracting strings from mail log

I'm trying to extract all lines of text from mail log file that contain specific string (mail address). I know using grep will allow me to search for the address mail.addres@example.org, but how do I ...
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1answer
25 views

CLI view of Software changes [duplicate]

I often install software, remove software, upgrade it etc, and sometimes I need to check on recent changes such as these that I have made. But to do this currently I am having to open the Ubuntu ...
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73 views

cupsd using 100% CPU, creating large (80GB+) error_log

Title says it pretty well. A few days ago I realized my Ubuntu machine wouldn't load after login. After some digging around on a liveCD I realized my HDD was at 100% capacity, so I deleted some large ...
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260 views

How can I log file access from users?

I have to give someone access to my computer, but I want to know afterwards which files he accessed... Can I create a log file for that? Is there an existing program for that? I know how to track ...
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Swap and Ram both maxed out and nearly froze my computer; what log files should I open, and who should I share them with?

Woah, linux just got gridlocked. Everything started screeching to a halt, not even mouse movement. Just opening tabs on chrome. Jumped to a terminal with ctrl+alt+f5 or something, took me minutes to ...
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33 views

Is it possible to see a log of all terminal output that occurred after running a command?

I know it's possible to see a history of all commands I've run, but is it possible to see a log of all terminal output that occurred after running a command? Context is that I want to see exactly ...
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Is it possible to log all items installed, modified, removed? (Ubuntu Server 14.04.2)

Is it possible to log automatically when things are installed, removed or modified at my Ubuntu server? It would be nice if I can view the log to see what I (as root) did modify, install, remove. ...
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50 views

What do these numbers mean in syslog?

I'm trying to determine why MySQL server process is being killed due to out of memory, so am looking at the sylog. Immediately before the 'out of memory' I see lots of lines with differing numbers but ...
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57 views

Where does Ubuntu 14.04 log SSH access attempts?

Trying to find out why fail2ban is not working. Where does Ubuntu 14.04 log SSH access attempts?
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1answer
37 views

how to customize logs?

As you know better than me any action in linux store in log files, like /var/log, I was wondering is there anyway to customize the log file in linux, for example in this case I'm the root of my ...
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885 views

How to install and setup graylog-server and graylog-web on Ubuntu from repositroy?

I am trying to setup graylog on Ubuntu 14.04. I tried to find out installation steps on internet I found few links. but their method of installation is manual I mean installation from the source. and ...
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2answers
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Is it possible to make ubuntu logless

Can I disable the logging features for any app running under Ubuntu? I want to make my system totally logless is it possible?
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Squid3: acl proxy_auth not working in log_access

I'm trying to configure a Squid3 proxy server so that it doesn't log the requests made by authentificated users. I've tried the following config (squid.conf): acl Users proxy_auth REQUIRED log_access ...
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55 views

How to figure out the reason for automatic log-outs on Ubuntu Unity and GNOME 3?

My installation of Ubuntu 15.04 logs-out automatically on both Unity and GNOME 3, it doesn't do it on GNOME Fallback. Is the Xorg 0 log file the place I should go to in order to figure out the reason ...
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62 views

Linux Crashes every time I word process [closed]

Linux crashes every time I word process. It doesn't matter if its a .doc, .docx or odt file. Doesn't matter if I'm using LibreOffice Writer, AbiWord, or IBM Symphony. It also does it when looking ...
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41 views

How to access user's activity log

How can I get the log that says programs which are opened by user with time stamp . I would like to develop a system to monitor and give suggestions using this user activity log.
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R/Shiny WebApp logs, running in shell (Ubuntu crontab)

I'm running, using crontab, an R/Shiny WebApp. The crontab expression looks like this: @reboot R -e 'shiny::runApp(...)' | tee /var/log/shiny-server.log I've also tried @reboot R -e ...
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60 views

Crontab - don't log? How can I do it right?

I've search for a answer of my problem but I can't find the right one. So I try it my self. I've got an Ubuntu Server and try to create a TeamSpeak3 Server - check file with loggin function. This ...
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57 views

org.freedesktop.DBus.Error.UnknownMethod on auth.log

My auth.log is full with error messages of freedesktop, most of them look more or less as follows: May 25 07:59:40 lati dbus[425]: message repeated 7 times: [ [system] Rejected send message, 3 ...
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86 views

LibreOffice 4.3 Error Logs - Where are they?

I cannot find out why LO Base cannot connect to mysql. Where are the log files located? I am running LO 4.3, mysql 5.6, on 14.04LTS.
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Cannot find log of application started through init.d script

I have created a .deb package of my scala application using sbt. I have successfully installed the application and am able to run it properly. Now, I want to start my application on system startup. ...
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96 views

Unable to start bootlogd

Since none of my boot messages are logged on Ubuntu Server 15.04, I tried: sudo service bootlogd start Failed to start bootlogd.service: Unit bootlogd.service is masked. This is related to systemd. ...
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2answers
176 views

Rotate nohup output

I'm working with weblogic 10.3.5 under ubuntu 12.04. Weblogic is started using nohup ./startWebLogic.sh ...
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1answer
28 views

Unable to log in Ubuntu 12.04 LTS

I am unable to log into my Ubuntu 12.04 machine, username and password prompts reapper again. I can only log in as a guest.
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1answer
170 views

Is it safe to delete btmp from log on ubuntu 14.04 rackapace server?

Basically I want to clear unwanted log files from ubuntu 14.04 rackspace cloud server. as files are using too much space. can I remove following log files from server ? /var/log btmp (35.4 MB) ...
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263 views

systemd on 15.04 won't log stdout of unit

I'm currently trying to make a systemd unit as a web server. Currently, my foo.service file looks as follows: [Unit] Description=The Foo Web Server [Service] Type=simple ...
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1answer
187 views

Change iptables log format

Is it possible to change the log format of iptables ? I want to add the ssh_client in the log. I have already made an iptables rule for outgoing ssh iptables -I OUTPUT -p tcp --dport 22 -j LOG ...
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59 views

Lastlog grows to 4.2G after SSH logout

Running a VPS with Ubuntu 12.04.5 LTS. Noticed a spike in disk usage. Turns out the culprit is lastlog. Overwrote it with >/var/log/lastlog. After logging out of the session and logging back in, ...
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340 views

How to view '/var/log/syslog' contents without crash

For various reasons it is necessary for me to check the log of my computer in /var/log/syslog, but this has become a bit of a problem because I am not actually able to view the logs in that file ...
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38 views

No logs are written to /var/log

I have a problem, that no logs are written to /var/log. -rw-r----- 1 syslog adm 6.4M May 21 2014 syslog -rw-r----- 1 syslog adm 5.7M May 21 2014 daemon.log -rw-r----- 1 syslog adm 494K May 21 ...
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Does the auth.log changes when I update?

As always, I have been using the Software Updater to search and install my updates. I know that the syslog and the dpkg.log changes when I update my system, but the auth.log also changes? Since it ...
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84 views

Redirecting iptables log works but logging continues in kern.log file too

Yes, I have gone through similar questions asked. My problem is that I am able to log the iptables log in another file. However, the log entries also get logged in kern.log file. I have the following ...
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Eclipse Juno crashes frequently, no logs

I downloaded Eclipse Juno CDT and am using it with Kubuntu 14.04 . Unfortunately, it keeps crashing on every other action I take... for example, if I try to load the Editor options - crash. I can't ...
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Stream has outstanding operation - error when opening Sytem Logs

Every time that I turn on the computer, I always start the System Log, where I can have easy access to auth.log, syslog, bash_history, etc. But, yesterday, every time that I open it, There is an ...
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1answer
16 views

Is it possible to find all the config file replacements done during apt-get?

When you perform a do-release-upgrade, or just a dist-upgrade, if a package contains a new config file for a program, you get prompted what to do. Now, you can pick whether you want to accept ...
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45 views

Massive log file and 100% CPU usage for 'upstart'

I have a fresh install of Ubuntu 14.10, and I installed some programs like MATLAB, Chromium, Evolution and other fairly harmless stuff. However, I have run into some trouble recently. The file ...
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80 views

log cron job in real time

I have a Python process which I run nightly via a crontab. It scrapes an API which I have limited access to so regularly has to stop and wait for an hour. By my estimates the job should take 5-6 ...
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1answer
886 views

How to create logfile for a bash script?

I've written a bash script that runs multiple instances of a program and would like to write the entire output of the script to a logfile. I tried #!/bin/bash touch <.../somewhere/logfile.log> ...
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55 views

Identifying syslog files, also does auth.log mirror what is in /vars/syslog?

I am writing a auth log parser as a means to contribute to a tool and to learn linux logging better. I have been reading up on syslog and log facilities and was wondering if what is in auth.log will ...
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How do you get those nifty transparent log displays?

So I've seen plenty of displays of transparent logs or running logs or htop instances on what appear to be fixed areas of a desktop. I think this is something like root-tail but I can't get root-tail ...
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49 views

How do I get a log of the start up error messages?

After encountering several "file is not writeable" errors out of the blue and rebooting, the system doesn't seem to be able to see the linux partition and it scrolls over the original error messages ...
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73 views

Computer automatically switches on in the morning

I have a small but annoying problem. For a while my computer has been switching on randomly in the morning around 3:45 AM or so. I have no idea how to fix this, i have checked a lot in the system ...
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111 views

How to check service logs

I would like to know when/who start/stop a service in linux? Is there any log to show those information?