All Questions
235
questions
0
votes
0
answers
626
views
How to get new generated file name on logrotate?
I want to get new file name generated by Logrotate and run a script on it.
Logrotate has an event called Postrotate() with a parameter called '$1' but it returns the original path file name for ...
- 101
2
votes
1
answer
2k
views
Is there any way to delete logs of a specific systemd service in linux?
After searching a bit, all I got is journalctl --vacuum-time.... However, this command doesn't delete service logs. So, how can I safely delete logs of a specific service from linux?
- 601
0
votes
0
answers
67
views
Linux log grows large, resets, does it again
Am running Ubuntu 18 and don't have a ton on their for apps. The hardware is setup with one 120gb SSD as root/boot and the rest of the drives as 2 pair of raid drives where media files, etc... reside.
...
- 113
1
vote
1
answer
2k
views
Redirecting the output of service in Ubuntu to Log files
I am on Ubuntu 16.04 and deployed a service in /etc/systemd/system.
The service file booster.service contains
[Unit]
Description = booster
After = network.target
[Service]
ExecStart =/opt/tech/...
- 11
0
votes
1
answer
273
views
Is it safe to remove read rights from all /var/log files for others?
Am I supposed to be able to revoke read access recursively to /var/log/ for others or will it break some applications which rely on being able to read from /var/log/ with other rights?
- 612
0
votes
3
answers
2k
views
How to record stdout and stderr with different tags in syslog?
I can redirect both stdout and stderr to logger this way:
./myprog 2>&1 | tee /dev/tty | logger
but I would like to be able to tag each log entry with "myprog-out" and "myprog-err" based on ...
- 233
2
votes
1
answer
4k
views
Log rotation with compression?
I'm running a process on Linux (CentOS 7) which produces a lot of output on stdout. Sending it all to a file will result in a file size greater than 1 TB. But happily the output is quite compressible -...
- 123
1
vote
1
answer
3k
views
The log files are empty
I found out that my /var/log/messages is empty!
Also my /var/log/auth.log is also empty!
Also it is not logging any messages.
My /etc/rsyslog.conf file is as follows:
# /etc/rsyslog.conf ...
- 181
3
votes
1
answer
3k
views
System logs written to an NFS mount
Today we had an issue with a Linux server that filled (100%) it's entire root (/) partition due to a misconfiguration in postfix that led to a huge /var/log/syslog file and yesterday we started using ...
- 145
1
vote
1
answer
360
views
Using "tee" to selectively log Ubuntu terminal output?
I need to log terminal output. But I only need some outputs which starts with a keyword (say starts with "error"). I use something similar to:
ls | tee "log.txt"
In this example command I do not ...
- 559
0
votes
0
answers
40
views
How do I log the execution of programs within a directory regardless of shell?
I'm curious when exactly a particular directory is being used and when it is loaded into memory. Is there a way to place a low level hook in the linux file system that says when a file with execution ...
- 101
-2
votes
1
answer
5k
views
Rsync returns “such file or directory” when running command
I am new to Linux and I am using rsync in order copy logs from one server to another but the command I am running says directory not found. What is going wrong?
001 rsync -u -avze ssh /apps/container-...
0
votes
1
answer
4k
views
Log messages containing a specific string to another file in rsyslogd
I want to save my log messages generated by iptables to another file via rsyslogd.
Currently I use this code from /etc/rsyslog.d/20-custom.conf:
# Log cron to cron.log and not to syslog
*.*;cron,...
- 153
0
votes
1
answer
90
views
Strip off previous lines in tail or less
I'm using tail -f or less +F to observe a changing log-file. I know from a certain point the lines I'm looking for are going to appear.
So all that garbage before that point I don't require and would ...
- 155
16
votes
1
answer
22k
views
How to follow systemd unit log?
I have a running systemd unit and I want to follow it's log.
I know I can show unit's log by using:
journalctl -u my_unit.service
But that only prints current logs without following them.
I know I ...
- 573
0
votes
1
answer
66
views
Is ftp connections and actions are logged in REDHAT 7?
I am using a REDHAT 7 server through a VPN connection (with some other users). I want to know if FTP connections and operations are logged somewhere. I tried to look around /var/log but nothing seemed ...
- 1
2
votes
0
answers
563
views
MacOS - How to change syslogd's log level for a specific process/program?
I am new to MacOS and I would like to get a better of view of what's going on with a system process when my computer is starting up. I can see in the log that a process is changing settings, but the ...
1
vote
0
answers
914
views
'su root' succeeded for root on /dev/??? - SunOS logging
I have a log like this in /var/log/authlog :
<date> <server> su: [ID 366847 auth.notice] 'su root' succeeded for root on /dev/???
and in /var/adm/sulog
SU 12/12 11:13 + ??? root-root
...
- 11
0
votes
3
answers
4k
views
search in log from last hour
I need bash script to search in the log words Failed and failure. But only from last hour
cut -c 5- /var/log/mail.log | awk '($0 >= from)' from="$(LC_TIME=C date +'%_d %H:%M:%S' -d -1hour)" |grep -...
- 1
2
votes
1
answer
12k
views
How to disable syslog messaging to /var/log/syslog
I'm working on a centralized logging solution using the ELK stack and Kafka.
I'm running Ubuntu Xenial on all the machines, and I'm using Rsyslog with omkafka to write all log messages to a kafka ...
- 171
1
vote
1
answer
1k
views
Is there a way to send logs to a remote host in real time?
I've been experimenting with high-interaction honeypots lately. Unfortunately if an adversary achieves root access they could easily wipe the logfiles on a system, defeating one of the purposes of a ...
- 182
1
vote
2
answers
304
views
Filter lines if number of string occurrence found?
Need to filter and show log lines, if line contains exactly 2 commas, and does not contains a specific string. Which linux command need I use, awk, grep, what is the expression?
For second condition ...
- 271
3
votes
1
answer
2k
views
How to enable systemd's journal audit transport?
I have been studying logging on Linux but I have come to a road-block that's got me stuck for the past few days. My goal is to forward logs from two raspberry pi 3's running OpenSUSE Tumbleweed (...
- 53
5
votes
0
answers
6k
views
How do I get reasonable server-side NFS log output?
I was experiencing some problems with nfs-kernel-server on Debian stretch which I could solve by luck. Still, I learned that the log output was not of much help of me. I would like to change that to ...
- 268
1
vote
0
answers
152
views
centos7 what is the best value of audit.rules
I am now suffered with audit : backlog limit exceeded.
I found some articles with similar situation and they said adjust audit log count with audit.rules.
Here is my audit.rules
## This file is ...
- 687
4
votes
1
answer
2k
views
How to send log entries to a remote server running journald (systemd)
I have an iot module running a firmware that has the capability of sending the logs to a remote syslog host. I've already configured it to send the entries to an Ubuntu Server running rsyslog.
I'd ...
- 143
1
vote
0
answers
28
views
Identify event that stalled server with GPU-applications temporarily
I'm running 4 intensive applications (training of machine learning models on GPUs) that regularly prints information about how fast they're running on a Linux 14.04 machine. Strangely enough, the ...
- 301
0
votes
1
answer
7k
views
rsyslogd: how can you use $ModLoad imfile more than once?
I am testing out Loggly.com, which uses rsyslogd to collect log entries. Loggly provides scripts that generate config files. Each config file starts with $ModLoad imfile, however this seems to only ...
- 165
1
vote
0
answers
506
views
Check to see if server is up
Create dir logs (for outputted logs)
Create a script IsTheServerUp.bash
Write a script to check if the server is up
Log(echo) the outcome to the file
Use curl command to check the server
Use ...
- 21
2
votes
1
answer
415
views
Break and restart Linux command when specific text appears
To simplify the situation as much as possible, let's say I'm tailing a log file that gets rotated out when an application shutdown occurs. Since the file changes, the tail stops. In order to continue ...
- 405
0
votes
1
answer
148
views
Occassional massive firewall log files on SuSE
Occasionally, over a short period of seconds, my SuSE Enterprise 10 /var/log/firewall log file fills with identical entries except for the id. Here's an excerpt:
Jan 15 11:21:13 IKCSWeb kernel: SFW2-...
- 103
1
vote
1
answer
3k
views
How to make my Window system a Syslog server
I have my D-link router which can forward its logs to a syslog server. Now, I do not have any syslog server. Hence, I want to make my Windows machine a syslog server to get those logs from the D-link ...
- 69
1
vote
0
answers
345
views
How can I get exact same log file name in Rsyslog v-8
Previously I was using Rsyslog v-7.14 and having the template:
$template UDP-Logging, "/var/log/RemoteLogs/%HOSTNAME%/UDP-%PROGRAME%-%$now%.log"
if $fromhost-ip ! '127.0.0.1' then -?UDP-Logging
&...
7
votes
3
answers
15k
views
What does "Still Running" mean (Linux)?
$ last -x reboot
reboot system boot 4.4.0-46-generic Mon Nov 14 12:15 still running
What does the "still running" mean at the end of the log entry?
Did the server reboot?
Is it going try later?
Is ...
- 71
-1
votes
1
answer
561
views
how to find a particular log from a server for one particular time and zip logs for only that time
I have got a command for the above question. Could anyone please explain me the below command?
DATE=`date +%m%d%Y-%H%M%S` ; for i in `ls -lt *.log* | grep "Oct 11" | grep -E '12:|13:|14:' | awk '{...
- 1
6
votes
2
answers
10k
views
How to get a clue why my Linux computer is freezing
tl;dr
My laptop computer running Linux is freezing randomly. What system tools can help to figure out what the problem is?
DISCLAIMER: I hope my question is not considered as a duplicate since ...
- 191
0
votes
1
answer
627
views
Create CSV and Statistic Graphic from own Log File
i am just not that good, to get it work...
i wrote a little script that runs a speedtest every 15 minutes, and logs the output in daily log files:
#!/bin/bash
DATE=$(date +%d.%m.%Y_%H:%M)
DAY=$(...
- 13
-1
votes
1
answer
89
views
Linux RedHat - Logging await
How can I create an await log for the devices /dev/emcpower*1.
The log should be in the pattern of:
Aug 23 10:00:11 /dev/emcpowera1 2.96
Aug 23 10:00:11 /dev/emcpowerb1 2.91
Aug 23 10:00:13 /dev/...
- 186
1
vote
0
answers
534
views
Problems with the tomcat access-logs
I need your help.
I want to log the access on my Apache Tomcat webserver on SLES 12.
It is running and logging normally. But when I visit the site, tomcat is writing 8 lines into the ...
- 11
0
votes
1
answer
804
views
Extract text from journalctl logging facility
I have a system which I can access directly with the keyboard but not by ssh (which is my problem, and which arises the question; a RasPi 3 with OSMC 2016.05-1, which is Debian-based, version: 8.5). I ...
- 315
1
vote
3
answers
3k
views
Rsyslogd Log entry about attack created by unknown application
I have a server running for testing purposes which lately caught some strange log entries in /var/log/syslog, /var/log/user.log and /var/log/messages.
auth.log does not show anything suspicious. No (...
- 11
1
vote
0
answers
47
views
New Trisquel installation always at 100% CPU, log files grow very fast, graphical glitches, etc
About a week ago, I installed Trisquel on a rather old (2010-ish) computer, and ever since then there has been an issue which I had never found a solution for, but hesitated from asking for support ...
- 11
0
votes
1
answer
63
views
Python logging output limited to ~65 lines
I am working on a simple python script on CentOS 7. There is an error, but I am trying to figure it out using the log.
I have a logging class that has the following logging levels:
Error
Warn
Degub
...
0
votes
1
answer
1k
views
how to see the output of a cron/at jobs while it is still running?
The output of a cron or atq job is automatically send by email to the user, when the job is finished.
However I am running a time consuming script, and I would like to check that it is running ...
- 151
62
votes
6
answers
10k
views
Alternative for "tail -f" that follows filename
I have some logs being generated using a timed rotating file logger. This logs to a file called tool.log, and at midnight, moves this to tool.log.<date> and starts a new tool.log.
I have a tail ...
- 1,211
2
votes
1
answer
2k
views
Recording a bash session
For auditing and documentation purposes, I'd like to find a command such that everything that happens in a given bash session, is written to a file.
I.e., I'd like to end up with a file that shows ...
- 163
1
vote
2
answers
1k
views
How to log all commands on a Linux machine?
Good morning,
My collegues have created a script that executes compilation commands on UNIX and Linux based machines. In order to execute that script, Eclipse needs to be installed on that machine.
...
- 2,283
0
votes
1
answer
903
views
Monitoring Linux writes to Compact Flash
I am working on a project that uses a SanDisk compact flash to host a linux operating system (ext2 file system and no swap). The system uses a separate IDE for logging and other file i/o functions. ...
- 1
1
vote
2
answers
320
views
Watching logs with less +F freezes after a while
less +F is a great command for watching logs, but it has very annoying issue. After a while it stops updating log file and requires restart. Is there any way to make it follow file forever?
- 193
1
vote
0
answers
132
views
how to get this layout with multitail
I have a silly one for you
I know how to do this with multitail (multitail -s 2 -sn 1,2 A.log B.log C.log):
+-----------------------+------------+
| | |
| ...
- 146