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Questions tagged [rsyslog]

Questions regarding rsyslog, a multi-threaded system and kernel logging daemon.

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44 votes
6 answers
27k views

Is there a way to keep UFW logging out of dmesg?

There are comments in the /etc/rsyslog.d/20-ufw.conf file that give you the option to keep UFW-events from being logged to the kernel and message logs, which i have done. I would really like to get ...
3dinfluence's user avatar
28 votes
2 answers
17k views

Relationship of rsyslog and journald on Ubuntu 16.04

I am running what is a vanilla Ubuntu 16.04 server, and I'm trying to wrap my head around how logging is set up by default. I can see that both journald and rsyslog are installed and running, but it's ...
motns's user avatar
  • 383
19 votes
2 answers
61k views

difference between rsyslogd and syslogd

I was trying to implement some changes to syslogd on Ubuntu 10.04.02 LTS (Server edition). I found /etc/syslog.conf is not present on system, instead I have /etc/rsyslogd.d/*.conf. syslogd can be ...
Jamess's user avatar
  • 3,123
18 votes
2 answers
148k views

How do I configure rsyslog to send logs from a specific program to a remote syslog server?

I have a program which outputs to syslog with a given tag/program name. I'd like to be able to filter syslog traffic from that program and send it to a remote syslog server, leaving all other syslog ...
Simmo's user avatar
  • 283
17 votes
1 answer
26k views

syslog not showing log levels in messages

Here is sample output of my syslog messages in /var/log/syslog: Nov 15 20:20:48 ubuntu winbindd[915]: [2011/11/15 20:20:48.940063, 0] winbindd/idmap_tdb.c:287(idmap_tdb_open_db) Nov 15 20:20:48 ...
user837208's user avatar
14 votes
2 answers
12k views

Accidentally deleted /var/log/syslog

I accidentally deleted /var/log/syslog and now I can't get rsyslog working. I was googling, I tried everything I found. To be precise: I created syslog with touch. Then I set chmod and chown ...
balping's user avatar
  • 443
13 votes
7 answers
24k views

UFW is not logging how do I troubleshoot?

I have set logging to high. I am not seeing any log messages. I do see the empty ufw.log file. No messages in dmesg
sureshvv's user avatar
  • 586
12 votes
1 answer
14k views

Missing /dev/xconsole causes rsyslog to stop as well as all other services

I'm running Ubuntu-10.04.04LTS in Hyper-V environments. I found that SSH, HTTP or any other service else stopped because the rsyslog daemon had died with the message unable to find the /dev/xconsole ...
George Van Tuyl's user avatar
11 votes
3 answers
27k views

could not load module rsyslog lmnsd_gtls.so

The rsyslog module is showing up in system log /var/log/syslog as message repeated. rsyslog was also showing 99% cpu use in top at one point, possibly unrelated. tail /var/log/syslog Dec 1 22:18:...
here's user avatar
  • 1,252
11 votes
1 answer
4k views

What does the minus sign at the beginning of a log file directory mean?

I just started to learn linux with Ubuntu 18.04. When I was reading the config file for rsyslog: /etc/rsyslog.d/50-default.conf , I found that some of the log file directories are having minus signs ...
Chaozy's user avatar
  • 121
11 votes
2 answers
10k views

Where do log messages go with journald and rsyslog

On Ubuntu 18.04 both journald and rsyslog are installed. Both serve the same purpose of collecting log messages and storing them. So we have two programs doing the same work here. What I could find ...
ygoe's user avatar
  • 998
10 votes
1 answer
21k views

rsyslogd using 100% cpu on ubuntu 14.04

On my ubuntu 14.04 rsyslogd is using 100% of my CPU (both cores). Even after some google searching I were not able to figure out why rsyslogd is using all of the cpu capacity all the time. The ...
daniel451's user avatar
  • 7,453
9 votes
2 answers
24k views

Every few minutes rsyslog outputs - rsyslogd: action 'action 3' resumed (module 'builtin:omfile') [v8.32.0 try http://www.rsyslog.com/e/2359 ]

Since my update to 18.04.1 last week from 16.04.5 I've been seeing this in my syslog every few minutes: Aug 19 19:22:02 localhost rsyslogd: action 'action 3' resumed (module 'builtin:omfile') [v8.32....
Chris Pollock's user avatar
9 votes
2 answers
2k views

asynchronous logging via rsyslogd(8) and write buffer increase

On a pretty high traffic web site running in virtual containers (VMware) and lacking local storage, we've managed to increase throughput (requests per second) significantly by switching from logging ...
arielf's user avatar
  • 2,833
8 votes
2 answers
17k views

Purpose of "postrotate invoke-rc.d rsyslog rotate" when logrotating, and is this command outdated?

When using logrotate to keep log files rotating, I have seen postrotate invoke-rc.d rsyslog rotate > /dev/null endscript I know postrotate makes bash execute the following command ...
fpghost's user avatar
  • 1,659
6 votes
1 answer
21k views

Package rsyslog is not configured yet

Since upgrading to 12.04 from 8.04->10.04 I can no longer upgrade or install new packages. I do get a large number of errors, but the first is the resyslog: root@sub:~# apt-get -f install Reading ...
Jamie Hutber's user avatar
6 votes
2 answers
3k views

Rewriting logs received via syslog from another machine

I have Machine A, which is a pfsense installation, that sends logs via syslog to a Ubuntu box. The Ubuntu Box will have to rewrite the logs, to replace for instance host names and change format a bit. ...
vidarlo's user avatar
  • 22.8k
6 votes
2 answers
8k views

No /var/log/syslog file after moving /var/log to tmpfs

To avoid useless write to my SSD I've moved /var/log (and /tmp) to RAM via /etc/fstab: cat >> /etc/fstab <<'EOT' tmpfs /tmp tmpfs defaults,size=1g ...
CDuv's user avatar
  • 161
6 votes
1 answer
17k views

how to configure rsyslog to send file from specific program to specific location on remote server

I want to configure rsyslog on a centralised server so that all the logs of clients are stored at one place now the problem I'm having is I dont know how to implement rsyslog so that it creates logs ...
Tarun's user avatar
  • 4,255
5 votes
2 answers
20k views

How to include millisecond in syslogs?

I have configured rsyslog.conf file in /etc to include my own logs as syslogs in a file at /var/logs. But after opening the file I got this: Jun 5 10:09:09 lab-Altos-G330-Mk2 slog[19689]: Hello1 Jun ...
RaulGupta's user avatar
  • 151
5 votes
1 answer
11k views

How to set size for system log

My server dumps because of huge system log files. I've heard that we could limit the size of system log by adding such a line size 100m into the file /etc/logrotate.d/rsyslog to do so. Now my /etc/...
Yves's user avatar
  • 1,308
5 votes
1 answer
14k views

rsyslog not rotating at fixed file size

I am trying to create a separate log file for a application in Linux. So far I have created a .conf script to separate log in custom log file based on program name and it's working correctly. But, I ...
JD1910's user avatar
  • 51
4 votes
2 answers
22k views

How do I setup OpenVPN to rotate logs?

I would like to rotate my openvpn logs. How can I accomplish this?
flickerfly's user avatar
  • 7,309
4 votes
3 answers
646 views

Why doesn't chkrootkit test syslogd?

When I scan my machine with chkrootkit I notice that it always says for one of them: Checking `syslogd'... not tested Why is this not tested for? Should this be ...
user avatar
4 votes
1 answer
1k views

Both journald and rsyslog are running

Since the migration to Ubuntu 15.04 both journald and rsyslog are installed and running. I'm wondering if this is by design or if rsyslog might not have been uninstalled by accident? Can I uninstall ...
Mausy5043's user avatar
  • 740
4 votes
3 answers
16k views

rsyslog template date/time format with seconds

My current template configuration of rsyslog looks like this: /etc/rsyslog.d/00-samba-audit.conf template(name="sambalog" type="string" string="%$year%-%$month%-%$day% %$hour%:%$minute% %HOSTNAME% %...
tenjohn's user avatar
  • 361
4 votes
1 answer
22k views

rsyslog filter by tag

I would like to create a rsyslogd config file that filter the syslog for specific tag and outputs this tag to a specific file. I create a rule file under /etc/rsyslog.d # Log kernel generated UFW ...
Mellowcandle's user avatar
4 votes
2 answers
22k views

Rsyslog filter for logging router events (syslog server)

I am trying to configure rsyslog (Ubuntu 12.04 Server) to log events from a router. I found this old ubuntu forum post which got me most of the way there. So far I am able to get the events logged ...
jpetersen's user avatar
  • 5,409
4 votes
1 answer
5k views

How to use rsyslog?

I've been scouring forums for a few hours and cannot find a concrete explanation on how to use rsyslog. I really just need the basics. I have a log file logFile.log and I want to forward the logs to ...
Roboman1723's user avatar
  • 2,915
4 votes
1 answer
2k views

Rsyslog doesn't log TCP after upgrade from 10.04 to 12.04

I was using Ubuntu 10.04 until last week for storing the log informations of a external device with rsyslog. After upgrading to Ubuntu 12.4 the logging of TCP doesn't works any more. There are just ...
Oxymoron's user avatar
4 votes
1 answer
1k views

Default to adm group for upstart logs

This bug suggests that on 12.04, the default permissions for upstart logs do not allow rsyslogd to read them: https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/1074564 That is the logs need to ...
brooks94's user avatar
  • 383
4 votes
0 answers
439 views

Syslog full of spam, slowing down PC

I recently upgraded my Desktop and Laptop to Ubuntu 21.04 and my logs are completely filled with message from gnome-shell, kernel and other programs. I have appropriate filers in /etc/rsyslog.d/30-...
Gothicawakening's user avatar
3 votes
4 answers
6k views

rsyslogd using 197% CPU for the past few days

I'm running Natty server on the rackspace cloud and rsyslogd as been churning away usin 197% CPU (quad core machine I believe) for the past few days. Is there anything I can do to figure out what is ...
Jesse's user avatar
  • 133
3 votes
1 answer
4k views

Moving log location for Tomcat 9 on Ubuntu 18.04

On a fresh instance in AWS of Ubuntu 18.04, I have installed tomcat9 through apt. I'm replacing a 14.04 Ubuntu install where i was running tomcat7. Due to the nature of my application, I have a very ...
eric's user avatar
  • 171
3 votes
1 answer
12k views

How can I configure logrotate without having `/etc/logrotate.d/rsyslog`?

I am trying to configure log rotation on my Ubuntu machine so that logs are rotated every day and kept for 14 days. Most tutorials I find, such as this one, mention that I should modify /etc/logrotate....
Aras's user avatar
  • 819
3 votes
1 answer
5k views

Redirect iptables logging to another logfile

I have followed the recipe by @Gilles in this answer. I succeeded, but the problem is that the iptables logging now goes into 3 log files, syslog, kern.log and iptables.log. Ideally, I want the ...
bearcat's user avatar
  • 203
3 votes
1 answer
6k views

How to start up rsyslog automatically?

Check current status of rsyslog $ chkconfig --list rsyslog rsyslog 0:off 1:off 2:off 3:off 4:off 5:off 6:off Start up rsyslog at some levels $ sudo chkconfig --level 35 ...
Enrique Videni's user avatar
3 votes
1 answer
24k views

Rsyslog not forwarding specific log file to remote server

I am going insane trying to get rsyslog to send a specific logfile to a remote server over UDP. This is the rsyslog.conf file for the sending server: # /etc/rsyslog.conf Configuration file for ...
user2284355's user avatar
2 votes
1 answer
6k views

How to specific "alert" or "info" with logger command in Ubuntu 16.04?

I am using a software F, installed on PC named A (192.168.6.5) (running Windows) for receiving log (rsyslog) from a remote Ubuntu 14.04 server B (192.168.6.6). In F, I can see logs from B with types ...
Andiana's user avatar
  • 297
2 votes
1 answer
704 views

Could rsyslog be purging log files?

Today I found a lot of log files empty, these were: /var/log/auth.log /var/log/syslog /var/log/daemon.log /var/log/kern.log /var/log/mail.log /var/log/user.log /var/log/mail.info /var/log/mail.warn /...
ringe's user avatar
  • 261
2 votes
1 answer
3k views

Replacing rsyslog with syslog-ng depends sylog-ng-core

I am trying to replace the default syslog by syslog-ng. syslog-ng is our standard and we want to use that syslog agent. root@VirtualBox:~# apt-get install syslog-ng Reading package lists... Done ...
user avatar
2 votes
1 answer
4k views

vsftpd cant log in with syslog_enable=YES

Hi guys I want to send my ftp logs to a syslog server, so I tried to enable syslog. But when I set syslog_enable to YES I cant use my FTP Server at all. I am getting this error message: 500 OOPS: ...
RaverTiny's user avatar
  • 403
2 votes
1 answer
457 views

How do I find a package that contains a given module?

How do I find which package contains a given module ? I had a missing module in /usr/lib/ , and was trying to figure out which package would fix the problem using apt-get The error was in /var/log/...
here's user avatar
  • 1,252
2 votes
3 answers
3k views

How to stop Dovecot from logging to syslog

I'm running Ubuntu 16.04 with the packaged Dovecot for imap and Roundcube for its web interface. Everything's working dandy except I can't get Dovecot to stop logging imap logins and imap logouts to ...
Forkbeard's user avatar
  • 2,453
2 votes
1 answer
1k views

Setup an extra, non-root syslog server as a systemd service

I want to create a systemd service, which would start an extra instance of syslog (I assume rsyslogd, as this seems to be what's installed on my Xenial?). I want it to listen on specified socket (...
akavel's user avatar
  • 351
2 votes
1 answer
81 views

Sporadic messages output to console after logging in

Coming right from a fresh install of Ubuntu 14.04 Minimal/Netboot (plus some small utilities like acpid, wicd-curses, etc.), after logging in, I occasionally get floating messages (the kind typically ...
silvernightstar's user avatar
2 votes
2 answers
3k views

Setting a size limit for current syslog

Based on other threads, the only way to set a size limit on current syslog (/var/log/syslog) seems to be via rsyslog which is a bit tricky. I ended up replacing the line below in /etc/rsyslog.d/50-...
Nerssi's user avatar
  • 21
2 votes
0 answers
3k views

How to enable /var/log/debug in Ubuntu 20.04?

How to enable debug logging that will be written to in /var/log/debug? There is a piece of configuration related to debug in /etc/rsyslog.d/50-default.conf: # # Some "catch-all" log files. # ...
metal4people's user avatar
2 votes
0 answers
670 views

Logrotate not doing his job, hdd full because of logs

I have a small microSD ( 3GB ) on a ARM Samsung Artik, with Ubuntu installed. I have installed syslog-ng and Logrotate to manage my logs, because otherwise my memory get filled quickly. My problem ...
Juliatzin del Toro's user avatar
2 votes
1 answer
2k views

Systemd service script not logging during shutdown

Background NetworkManager doesn't run dispatcher.d/pre-down.d scripts, so I have created a systemd-service script. It is working well during startup and shutdown, but during shutdown it doesn't write ...
user avatar