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Questions tagged [monitoring]

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

4
votes
5answers
546 views

Unpredictable memory explosions

The main server at my company has recently been having a lot of downtime. For reasons that neither I nor the other admins can determine, it has random (VERY sudden) explosions in memory. It becomes ...
19
votes
4answers
67k views

Linux file access monitoring

Is there any way in unix to find out who accessed certain file in last 1 week? It may be user or some script ftp it to some other place. Can I get a list of user name who accessed certain file? How ...
11
votes
4answers
2k views

Forcing an 'added' alias to every command

Is it possible to forcibly add a timing alias (for lack of a better way to phrase it) to every command in bash? For example, I would like to have a specific user who whenever a command is run, it is ...
3
votes
2answers
967 views

Monitoring process activities using system calls only (without utilities like `top`)

I want to obtain information about memory used by different users and different processes which users are running and statistics about those processes like memory consumption, execution speed, etc., ...
1
vote
1answer
165 views

How can I test the system footprint of applications?

I am about to develop a piece of software and I want to ascertain the impact it has on my system. The main things I am look for are load times, memory and CPU usage and shutdown time, although I would ...
10
votes
4answers
15k views

USB performance/traffic monitor?

First of all, I found a similar question but it doesn't really solve my problem. I am trying to discover if the USB bus for a device I am using is the bottleneck in my program. How can I monitor a ...
5
votes
5answers
560 views

performance monitoring

Is there some performace monitoring tool which would run in background gathering info about all system activity? Somethimes my system (Arch linux, 32 bit) slows down terribly and the top utility doesn'...
32
votes
3answers
49k views

Where can I see a list of kernel killed processes?

Is there some way I can check which of my processes the kernel has killed? Sometimes I log onto my server and find that something that should've run all night just stopped 8 hours in and I'm unsure if ...
10
votes
3answers
10k views

How can I monitor disk I/O in a particular directory?

I've got a few processes with a known name that all write to files in a single directory. I'd like to log the number of disk block reads and writes over a period (not just file access) to test whether ...
28
votes
1answer
3k views

Why isn't a straightforward 1/5/15 minute moving average used in Linux load calculation?

Until recently I thought the load average (as shown for example in top) was a moving average on the n last values of the number of process in state "runnable" or "running". And n would have been ...
4
votes
2answers
559 views

Relaunch application once finished

Is there a command that relaunch the application once it finishes from the command line? Letting you do something like: > relaunch python myapp.py If not, then what's my best option? I know I ...
4
votes
2answers
2k views

How can I see dumps of wholе HTTP packets?

I need to see whole HTTP packets sent and recieved by an application for debugging purposes. How can this be done in command-line?
14
votes
5answers
7k views

What happens when I open and read from /proc? [duplicate]

Does the hard drive need to be accessed or is everything done in memory? Basically I would like to constantly get updated values from meminfo and cpuinfo. Do I need to reopen the file and then reread ...
14
votes
2answers
12k views

Linux: Writing a watchdog to monitor multiple processes

A few years ago, a coworker came up with an elegant solution for a watchdog program. The program ran on Windows and used Windows Event objects to monitor the process handles (PID’s) of several ...
14
votes
3answers
8k views

Is there a tool that can monitor bandwidth usage of a single process?

I've found a nice monitor which allows me to log a variety of runtime data of a single process. I'm looking for an equivalent that does the same for bandwidth usage. Ideally, the command should look ...
76
votes
6answers
105k 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 ...
31
votes
5answers
20k views

Is it possible to find out what program or script created a given file?

Three files have suddenly appeared in my home directory, called "client_state.xml", "lockfile", and "time_stats_log". The last two are empty. I'm wondering how they got there. It's not the first time ...
9
votes
3answers
3k views

How do you choose which monitoring application to use?

Having a system for collecting performance statistics can be extremely useful. In the past, I've used Munin for this, and it has been invaluable in analyzing bottlenecks and various other issues. I ...
17
votes
6answers
18k 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?
20
votes
1answer
20k views

What is [jbd2/dm-3-8] and [kdmflush]? And why are they constantly on iotop?

Using Fedora for a small Samba and development server.
16
votes
5answers
2k views

Monitoring activity on my computer.

So recently I found that someone has been using my computer without consent, browsing folders, etc.... I could change all my passwords straight away, but I'm curious as the what the intruding party ...
4
votes
5answers
587 views

Network monitoring tool

I'm basically looking for a utility that displays which processes are using how much bandwidth, similar to how top displays which processes use how much resources.
4
votes
2answers
3k views

How can I have activity in a Dropbox folder logged?

I have a folder shared with others through Dropbox. When a file is added to this folder, I get a system tray notification in KDE --- but of course if I'm not at my computer, I wouldn't see the ...
20
votes
3answers
200k 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 ...
3
votes
4answers
12k views

What is “System Memory ” displayed in nmon in AIX?

I have a host with AIX 6.1 (6100-04-02-1007) upgraded from AIX 5.1 with Veritas Storage Foundation 5.1. Since the upgrade from AIX 5.3 to 6.1, Run vx services means a lots of memory consumed that I ...
6
votes
4answers
314 views

Quantify unix responsiveness

I am one of the n users of a shared unix machine. For reasons unknown, the machine is not "responsive" enough. For example, it is slow on interactive commands, it takes few noticeable moments for any ...
6
votes
1answer
6k views

Monitoring USB traffic

Kernel version: 2.6.31-22 I wish to monitor the USB traffic to and from a device. I've searched, but different sites seem to give different information and I'm confused. Some sites suggest that I ...
4
votes
5answers
2k views

how to ensure a program is always running but without root access?

Currently I need to have a program running all the time, but when the server is rebooted I need to manually run the program. And sometimes I'm not available when that happens. I can't use a normal ...
22
votes
9answers
41k 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 ...
17
votes
8answers
14k views

What are some common tools for intrusion detection? [closed]

Please give a brief description for each tool.
152
votes
9answers
275k views

How to monitor CPU/memory usage of a single process?

I would like to monitor one process's memory / cpu usage in real time. Similar to top but targeted at only one process, preferably with a history graph of some sort.
8
votes
3answers
1k views

How to track down memory spikes?

I have an app running on rackspace cloud (ubuntu 10.04). For some reason, over the last 3 nights, the memory has been spiking and then leveling off for about 7 hours before eventually falling off. ...
7
votes
2answers
2k views

Desktop overlay program showing CPU, HDD, etc. stats

In different screenshots of people's Linux desktops, I've seen different apps that overlay the desktop with information about their computer. Often this gadget/app shows CPU and HDD information. ...