General :: Determine Which Programs Are Using Swap / How Much
Apr 20, 2011
I'm interested in figuring out which programs on my machine are using swap, and how much each is using. I realize this can probably be done with top, but I am having trouble figuring how how.
What I've tried:
Start top
Press f (add column)
Press p (SWAP colum)
This adds a SWAP column, but the data doesn't seem to be correct. Top lists Firefox as using 582m of swap, but the header simultaneously reports that 0k of swap is being used.
Is there a better way to monitor swap usage?
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Jun 10, 2010
How can I figure out which programs are using up swap space? My current memory usage is 2.9GiB out of 3.0GiB used(and I though I had 4GB, I need to check into that) and 1.3Gib of swap used.
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Jan 10, 2011
On one of my servers the "free" command tells me that a lot of swap space are in use. What I'd like to do is to determine which processes have been swapped out. I tried issuing "top" and sort by the "swap" column, but this doesn't seem to provide correct values - when performing the same excersize on another server with close to no pages swapped out, the sum when adding the swap value for each process greatly exceeds the swap usage reported by "free". So how do I go about determining the swap space used for individual processes?
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Jan 5, 2011
I've tried to compile certain things and after seeing dependency hell, I just aborted and would like to make sure that I have removed all non-Squeeze programs. Is there a terminal program that checks if every program that I have belongs to the Squeeze repository?
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Mar 16, 2009
I see from the netspeed applet that my computer is downloading stuff almost constantly. Not a whole lot, 8b - 700b per second while apparently doing nothing. Some of this is just responding to broadcasts from the router, but surely not all. I would like to be able to determine which programs are accessing the internet over that wireless card, with a view to cutting down on my bandwidth usage. Is there a program that can tell me which ones are doing what at a given time?
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Feb 19, 2010
I know it's possible, but does anyone have a URL or tutorial on how to do this?
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Mar 20, 2011
Does one need to Check the Swap filesystem, from time to time
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Dec 7, 2010
Lucid on an Acer Travelmate800.Can anyone tell me why I have 0k for swap space? I allocated swap which I can see in my Disk Utility's 'volumes' display.
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Aug 16, 2010
RAM for older machines like I use is fairly cheap these days. But flash memory is just as cheap or cheaper. So I'd like to ask about the feasibility of expanding my system's memory using flash memory. And about whether creating a partition for swap on the flash memory, or whether a swap file on the flash device, is the better way to go.
By flash memory I have in mind mainly USB sticks or what are sometimes called "pen drives." But I do also have CF and SD cards that, with the proper cheap adapter (one of which I already own for adapting CF) could be used to create extra swap space. So, what is the current consensus on the feasibility/advisability of using flash memory for swap? I've read about the limited write cycles of flash being an argument against using it for swap. But recent reading indicates to me that the limited write cycles problem applies mostly to older, smaller-capacity flash memory. Some will come out and say that, for larger-capacity flash memory, the life of the device is likely to exceed the amount of time your current computer will be useful (I think I've seen estimates in the range of 3-4 years life--minimum--for newer, higher-capacity flash memory).
A more persuasive argument I've heard against using flash memory for swap is that access times for these devices can be much slower than SATA, and maybe even IDE, hard drives. That would certainly dictate against using flash memory for swap.
So, how about some input on this issue? Anyone using flash memory for swap? If so, what kind (e.g., usb stick or SD/CF)? Are you using a swap file or a swap partition? How's system performance? Likewise, has anyone had flash-memory-used-as-swap die on them? The consequences would undoubtedly be dire. Also, has anyone measured flash memory access times to confirm or refute claims about slow access times? Are some types of flash memory better/worse than others in terms of access times?
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Apr 13, 2010
Just wondering if there is a way to determine if the user has logged in is via ssh or if they are sitting directly in front of the PC and have logged in that way.I was going to do it via the .bash_profile so once they have logged in the bash_profile is run and it will have a test to see if the user is logged in via ssh or 'direct' log in. but not sure how or if this can be done.
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Jan 20, 2010
I have cloned my linux OS onto a new hdd. Now even tho the system will boot, it directs me to the login screen and asks me to fix the location of the root dir because it is looking for /dev/disk/by-id with a very long serial #. I presume this is the old hdd serial #. How can I determine the serial # of the new hdd and change it in fstab? Is this the correct idea? Is it just......ls /dev/disk/by-id???
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Jul 2, 2011
How do I determine what sound card I have? How do I find out for sure what version of Linux I am running? I think it is 10.04 Lucid.My computer is a Dell desktop, pentium 4.
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Apr 20, 2011
Firstly I would like to say that Linux is very cool, especially the CLI. I have been trying to learn how to do some things in Fedora after being told Fedora was a good distro to get my feet wet. I have run into some issues and cant seem to find any answers. What Linux utility can be configured to automatically save the current logs?
How does your Fedora get an IP number? What IP numbers has your Fedora been assigned since it was installed (based on the logs you have)? What command did you run to determine the IP numbers? What command would you run to determine the number of times a user successfully used "su"? What command would you run to determine the number of times a user unsuccessfully used "su"? Having some issues with the file system as your Fedora boots up.
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Jun 25, 2010
server has stopped responding 2x the past week. can't authenticate locally, web servers are not responding, etc. reboot seems to resolve the issue temporarily, but it looks like a disk or controller failure.
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Nov 13, 2009
We have quota system in home directory and there is binary aquota.user file.
How do i determine how much quota is assigned to a user?
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Mar 14, 2010
How do I, in Ubuntu, determine what the formatting (e.g FAT etc.) of an SD card is?
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Mar 23, 2010
How would I find out all the files a particular process accesses?
I am using Ubuntu 9.04.
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May 18, 2010
Finding the process that is using a certain port in linux
I have an Ubuntu Server setup, where I'm trying to set up a daemon that wants to have access to port 8080. When I run the command, the error message says it's being used by another process. But which one, it doesn't say. How can I go about finding which program uses this port?
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Sep 20, 2010
When CentOS boots up, it tries to determine the IP for a network device (eth0) and fails.
'Determining IP information for eth0... failed; no link present.'
I'm curious to know how, after booting up, I could set the IP information for a wireless device, wlan0, manually. Another way of putting this questions is: if CentOS is able to determine IP information for a network device on bootup, what settings is it configuring exactly?
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Nov 16, 2010
We have two directories:
$ ls -l
total 8
drwxr-x--- 2 nimmy nimmy 4096 Nov 15 19:42 jeter
drwxr-x--- 2 nimmy nimmy 4096 Nov 15 19:42 mariano
I create one file in the first folder:
$ dd if=/dev/zero of=jeter/zero_file.1 bs=512000 count=1
1+0 records in
1+0 records out
512000 bytes (512 kB) copied, 0.268523 s, 1.9 MB/s
This is the output of du:
$ du -sh *
504K jeter
4.0K mariano
As expected, if I place a hard link of the zero_file. in the other folder du output does not change:
$ ln jeter/zero_file.1 mariano/zero_file.2
$ du -sh *
504K jeter
4.0K mariano
there is nothing in the filesystem that points to zero_file.1 as the original file. So how does du know to count zero_file.1 but not zero_file.2?It cannot be a timestamp comparison because all hard links share one inode; they'll have the same timestamp data correct?
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Feb 11, 2011
Let's say I have a bash script called log.sh. In this script, I want to read in input from a pipe, but I also want to know the command used to pipe input into me. Example:
tail -f /var/log/httpd/error | log.sh
In the shell script, I want to know the command tail -f /var/log/httpd/error.
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Jan 13, 2010
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processor : 0
vendor_id : GenuineIntel
cpu family : 15
[Code]...
I've looked on the Intel processor finder web site with appropriate filters, but the stepping values do not appear to match anything.
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Jan 19, 2010
I'd like to determine what process has ownership of a lock-file. The lock-files are simply a file with a specific name that has been created.So, how can I determine what process has a particular file open in Linux? Preferably a one-liner type or a particular Linux tool solution would be optimal.
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Feb 27, 2011
As per these instructions, I got up to the end of the "Acquiring an Ubuntu filesystem" step (where it asks you to mount the newly created Ubuntu partition) and ran into a problem: The partition won't mount, as the file system type cannot be determined because I cannot remember the file system used during installation. Is there any command that prints the file system type of GPT partitions?
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Nov 16, 2010
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Apr 5, 2011
I m using SUN Server .
How would i determine the number of RAM slots using dmidecode.
I m running following command to get RAM information. code....
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Jun 13, 2010
Is there a linux/unix command that will return where a domain is hosted at? Basically, the command that is used for [URL]?
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Nov 30, 2010
i have a folder with 10 files and i would like to determine the size of each file. i was trying the command
Code:
du -sh foldername
but i receive the total size .
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Feb 8, 2010
I am writing, well actually enhancing, a script to do a daily backup of important data on my PC to a second hard drive.I wish to tar my home directory to a single file - and will probably use gzip as well.So I decided to work out the correct tar syntax in a terminal first - here is what happened.I opened a terminal window.I cd to a directory not part of my home directory.I issued the command..Quote: tar -cvf mytar.tar /home/ken tar processed a bunch of files, the last being .netrc.I examined the tar file and it contains .netrc.The contents of .netrc are correct.I scrolled back through the list of files in the terminal window and do not see any error messages.I guess the question is... how do I determine what file tripped up the tar process?
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Nov 8, 2010
i can i determine my distribujtion type, i use a redhat linux 9, i need to knw for download benefits, cause its seems am alwyas downloadin the wrong software for my package.
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