Obtaining real-time values of system parameters or events (processor load, server responsiveness, intrusion attempts, …), or getting alerted when certain events happen

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1answer
33 views

How to send a mail when someone remote connects to my server

I would like my server to send a mail to me when someone connects remotely over ssh to my server. who only gives me back the Username, TerminalID and Date. I cannot use only that, I need to check ...
4
votes
3answers
291 views

Open a directory and let it update itself using “tail -f”

Similar to my last question: Open a text file and let it update itself; is there a way I could do the same but for a folder instead? As I have a log folder, can I use tail -f with a folder? i.e. $ ...
0
votes
1answer
864 views

SMTP connectivity issue in Zenoss (“Connection unexpectedly closed”)

I am using Zenoss for monitoring purpose. I have been using its mail service for a long time. Suddenly my mail service in zenoss stopped and started showing <class ...
1
vote
1answer
31 views

Find service by network activity

I see a strange DNS request at tcpdump and I want to find service which is originated from. I've already tried to find it with different monitoring tools but still no luck. Is there any proven ...
6
votes
2answers
74 views

Operations only on complete files [duplicate]

I have machine on which the files are uploaded by ftp. From this machine I would like to run cronjob and scp/rsync (simply copy them) to different machine in the same network. The problem is I don't ...
9
votes
3answers
808 views

Open a text file and let it update itself

How can I open a text file and let it update itself? Similar to the way top works. I want to open a log file and watch it update itself on the fly. I have just tried: $ tail error.log But just ...
2
votes
2answers
418 views

Measuring CPU and Memory per user to distribute “cost” of a server

How should I implement approximately correct per-user monitoring on a server? I want a way to split the cost of a server between the users based on their usage. On newer machines (RHEL6) I would use ...
2
votes
1answer
706 views

What is the difference in CPU utilization between 'ps aux' and 'ps -ef'?

I use Ubuntu 12.04.1 Linux. I see a difference between %CPU and C output format of ps command for a process. It is not clearly noted in the ps man page. Man pages says: CODE HEADER ...
2
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0answers
8 views

API Monitoring and Hooking

I am currently reading the "Malware Analyst's Cookbook and DVD". There is a chapter "Dynamic Analysis" and there are also some recipes about hooking and monitoring API calls of process but it is for ...
11
votes
9answers
4k views

Ensure a process is always running

I started hosting sites a while back using Cherokee. For external sources (FastCGI, etc) it has an option to launch the process if it can't find one running on the designated socket or port. This is ...
2
votes
3answers
128 views

Monitor history of USB flash drives

I have to setup a monitoring system for our internet server, to monitor which USB Flash Drives (Pen Drives) are mounted and unmounted and when.(This is to avoid misuse, and to capture which ...
2
votes
1answer
455 views

Network bandwidth measurement on Solaris

I want to install pathtest or a program like it in a Sparc server running solaris 10. The purpose is to make a speedtest server to my remote sites. It is mentioned in pathtest FAQ that it only ...
5
votes
2answers
3k views

Monitor mode wifi only seeing broadcast packets

I have pretty much exhausted every link I have found on google regarding this topic, and I'd like some of the most experienced eyes on the problem, because something obscure must be going on. Systems ...
0
votes
1answer
402 views

Turning off mailing in psad

The psad monitoring tool keeps on sending lots of mail to my localhost admin account. I use my ubuntu server as a NAT router, and psad warned me to enable logging in iptables. After I did so, it ...
0
votes
0answers
21 views

Issues with net-SNMP . MRTG not generating graph to monitor network bandwidth

I am monitoring network bandwidth for my servers using MRTG . But suddenly can see graphs are not generated for one of the Linux servers running on CentOS 5.5 . SNMPD service is running on the server. ...
3
votes
1answer
558 views

Accounting for /proc/net/dev reported traffic

I noticed that according to /proc/net/dev I am constantly receiving around 6Kb/s on my wireless usb interface. But I can't account for anything even close to that with the individual connections that ...
0
votes
2answers
4k views

CPU usage monitoring in AIX servers

In order to monitor the CPU usage in an AIX server I'm using the following script that is executed every 10 mins. lparstat 2 10 > cpu usage=$(tail -10 cpu | awk 'BEGIN {sum=0;} {sum+=$4} END{print ...
0
votes
1answer
24 views

CPU and Memory Usage

I want to monitor the CPU and Memory usage for long hours and find the average of that on a Linux server. Can anybody help me to monitor it using a script. I want to know the readings for around ...
9
votes
6answers
3k views

Is there a tool that allows logging of memory usage?

I want to monitor memory usage of a process, and I want this data to be logged. Does such a tool exist?
0
votes
3answers
61 views

Recommendations for Free Linux monitoring tools [closed]

My Linux version is Linux 3.4.76-65.111.amzn1.x86_64 x86_64. It's AWS. These days I'm suffering from the absence of monitoring tools, processes sometimes die without knowing it. My need is simple. ...
2
votes
1answer
45 views

PBS equivalent of 'top' command: avoid running 'qstat' repeatedly

When I run several jobs on a head node, I like to monitor the progress using the command top. However, when I'm using PBS to run several jobs on a cluster, top will of course not show these jobs, and ...
2
votes
2answers
93 views

Is there a way to get “top” to run exactly once and exit?

I find the output of the shell command top to be a simple and familiar way to get a rough idea of the health of a machine. I'd like to serve top's output (or something very similar to it) from a tiny ...
1
vote
1answer
62 views

Real vs Actual memory in Xymon/Hobbit

What is the difference between real and actual memory usage in xymon ?
6
votes
4answers
14k views

How to monitor incoming http requests

How can I monitor incoming HTTP requests to port 80? I have set up web hosting on my local machine using DynDNS and Nginx. I wanted to know how many request are made on my server every day. Currently ...
14
votes
5answers
23k views

Script to monitor folder for new files?

How do I detect new files in a folder with a bash script? I would like to process the files as soon as they are created in the folder. Is this possible to do so or do I have to schedule a script with ...
2
votes
3answers
1k views

Can conky monitor other Linux computers on the network?

I know conky can monitor my personal computer, but can it monitor the other Linux servers I have on the network? I'd like to see data on CPU and memory usage and some critical processes each server ...
5
votes
2answers
33 views

How to monitor Memory utilization of the single process?

How to monitor Memory and CPU usage of the single process by program/executable name(not PID);
1
vote
1answer
103 views

How to monitor outgoing http requests per user?

I'd like to know how to monitor users' outgoing http requests. I've got a FreeBSD 8.1 server, and I would like to get an output like this for http requests: source MAC address or IP address → ...
4
votes
3answers
201 views

Lots of traffic between servers - where does it come from?

We have ten servers in two groups servers, and there is a lot of traffic between those groups - too much we think. We know this because of stats of our provider, but don't know how this traffic is ...
22
votes
5answers
13k views

Determine which process is creating a file

Given file path, how can I determine which process creates it (and/or reads/writes to it)?
1
vote
2answers
40 views

How to see what processes WERE running?

Is there a chance to get the processes that RAN before my system crash? EDIT What I really want is to see the past processes. My system crashed & I want to know if a specific process was the ...
16
votes
4answers
12k views

On-the-fly monitoring HTTP requests on a network interface?

For debugging purposes I want to monitor the http requests on a network interface. Using a naive tcpdump command line I get too much low-level information and the information I need is not very ...
2
votes
0answers
27 views

monitor running services and ports

What is the best way to monitor running services and ports on a system with systemd? My intent is to alert me, when a service stops running or if a new service is listening on a new port (possibly a ...
3
votes
1answer
47 views

Monitor outgoing web requests as they’re happening

I want to see a list of all outgoing HTTP requests from my desktop. I think it should be possible to monitor HTTPS hostnames as well for local clients using Server Name Indication (SNI). OS X has a ...
1
vote
2answers
48 views

Monitor Disk Usage per directory/file

I have a huge java app that drives my disk crazy. As I think that this issue is only due to 3-5 small things I would like to monitor what is written to/read from disk within an hour sorted by size and ...
5
votes
1answer
2k views

How to I install zabbix-agent over apt-get

Why is it that on my Ubuntu 13.04 system I can easilly install zabbix-agent by doing apt-get install zabbix-agent. When I do it in Debian 7.1, it says that the package zabbix-agent can not be found. ...
5
votes
3answers
31k views

How can I see what processes are running?

I use Ubuntu Server 10.10 and I would like to see what processes are running. I know that PostgreSQL is running on my machine but I can not see it with the top or ps commands, so I assume that they ...
2
votes
1answer
23 views

Track HDD access?

How can I track HDD access? Not in a monitoring sense of MB/s like iotop. My internal mass storage HDD gets permanently woken up and I want to find the evil process with an absolute list of accesses.
1
vote
0answers
75 views

tcpdump not capturing http or tcp/ssl traffic

I have been trying to learn tcpdump and I am using this command to attempt to monitor my network: sudo tcpdump -I -i en1 But this gives me a bunch of stuff I don't want, so I used this version to ...
3
votes
1answer
65 views

Monitoring filesystem activity

Say, I have a program, and I want to monitor its filesystem activity (what files/directories are created/modified/deleted etc.) This program may be capable of spawning further processes, and thus, I ...
0
votes
1answer
39 views

get cpu by user

Working with monit I need create an alert that get cpu usage of system users, so: top -b -n 1 -u user1 | awk 'NR>7 { sum += $9; } END { print sum; }' seems a good solution but I'm not sure about ...
4
votes
3answers
121 views

how to determine how many times pid_max wrapped?

Is it even possible to know that? may be some kind of tests are required to be performed in order to find that information? My system, just after I login, seem to have already wrapped the max_pid, so ...
9
votes
2answers
267 views

Internet connection drop alert

What software is there that will play an alert (PC speaker) when there isn't any internet connectivity for 5 minutes? My switch/router seems to disconnect every few days, and I want to reset it when ...
1
vote
2answers
35 views

List of files accessed by application

I want to install propertiary AMD driver but I would also like to know which files were created/changed by installer. Is there some application which can observe (probably by inotify) which files were ...
4
votes
1answer
860 views

Monit daemon interval setting…global or service-level?

I'm configuring monit on Ubuntu 11.04. In monitrc, the following setting controls the interval at which the monit daemon monitors services... set daemon 120 Is this a global setting? If I want to ...
2
votes
1answer
59 views

how to know the use of my applications?

I want to know how long my programs have been used. For example if I use my web browser I want to know the start and the close time to obtain a total of use time. Basically I want to know when an ...
1
vote
0answers
50 views

SystemTap simple demo fails

Started learning SystemTap using RedHat's manual. Here is the example I'm trying to run. While executing stap open.stp I got the error: [root@ror6ax ~]# stap open.stp semantic error: while resolving ...
15
votes
3answers
6k views

List the files accessed by a program

time is a brilliant command if you want to figure out how much CPU time a given command takes. I am looking for something similar that can list the files being accessed by a program and its children. ...
1
vote
1answer
93 views

xentop gives static info about memory usage

I am using CentOS 6.5 and Xen 4.2.4-30 xentop does not change MEM(%) at all. NAME STATE CPU(sec) CPU(%) MEM(k) MEM(%) MAXMEM(k) MAXMEM(%) VCPUS NETS NETTX(k) NETRX(k) VBDS VBD_OO ...
2
votes
2answers
55 views

Is there an auto refreshing graphical text file reader?

So, is there a graphical text reader or editor that automatically refreshes its text if the file is completely changed outside of it? I found that gedit detects file changes but refresh is not ...