Ubuntu Servers :: JFS - XFS Processes - None Of File Systems Use XFS Nor JFS
Jun 22, 2011
After an update recently I noticed that my process count jumped up quite a bit. Somehow it doesn't seem related (it was an apt update I believe), but I'll just throw it out there. All of the extra processes seem to be related to XFS and JFS file system kernel processes, but none of my file systems use XFS nor JFS, just EXT3 & EXT4. Is there any safe/easy way to kill off these processes and prevent them from re-spawning? I don't find having irrelevant idle processes to be beneficial nor efficient. It's using Ubuntu 10.04 64-bit. Only active file systems are EXT4 and EXT3.
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Dec 16, 2009
I am still puzzled by IT guru who still install a server version of Linux using the default partition system. I am curious about what the IT guys in this forum think about this, even when the server is part of a cluster.
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Sep 22, 2010
I have an issue on one of my servers whereby the [normally very helpful] du and tar programs are somehow using up too much or my system resources (du 40% mem, tar 20% mem) and causing problems. I am after a command which is able to kill a process without knowledge of a PID but by process name e.g. "du" and memory usage e.g. >= 10%.
Something along the lines of:
kill $(pgrep du) grep %MEM > 10
Although I know that is invalid syntax I cannot fathom the correct/best way to achieve this end!
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Jul 11, 2011
I am trying to check what all processes are accessing a particular file (a UDP socket in my case) on a filesystem.I am using 'fuser' for that.But, it seems, it only gives the processes accessing the file at that particular moment.Is there any way to continuously run 'fuser' (or some other command) which will give all processes accessing the file during its run?OR is it possible to generate a filesystem alert when a particular process accesses the file?
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Feb 16, 2011
I have two systems in both systems there I installed ubuntu 10.10. I need to know how to share an internet connection over the two systems at a time?
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Jun 3, 2011
I've been trying last days a script to reboot periodically my servers. My idea is to execute the script from one machine, and remotelly, restart the other servers. Now, I've configured ssh to access remote machine without password, using key-pair access, but I am not able to run "shutdown" command without password, so the script doesn't finish cause it waits for password to run shutdown with su priviledges
I've been reading about sudoers file, and applied this configuration on remote machine sudoers file.
Code:
# Cmnd alias specification
Cmnd_Alias SHUTDOWN_CMDS = /sbin/shutdown
...
# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL
myremoteuser myremotemachine= NOPASSWD: SHUTDOWN_CMDS
I've been testing this configuration on remote machine, logged as myremoteuser, executing /sbin/shutdown -r now, but "shutdown: Need to be root" message is returned, so something seems to be wrong in my configuration but I don't know what.
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Feb 22, 2010
I'm looking for a command that will give me a list of users (unique, dont name my user account 60 times) that are running processes on a system.
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Apr 1, 2010
When I open top and look at the running processes, there a bunch that are -5 in the nice and 0 with everything else.
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Apr 19, 2010
I have several web servers running Ubuntu 8.04 64-bit server and occasionally Apache sends my load to 13 and higher.
Is there a log that actually tracks the system load levels and possibly the processes running at the time and their percentage of the load?
At the basic level what I am looking for would be a log of top but not exactly that.
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Jul 28, 2010
What is the name of two servers that allow you to share directories between systems?
what is NetworkManager? What does it do when you install a new NIC?
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Aug 19, 2010
I was under the impression that /etc/environment was the place to put variables if you wanted them to be available to all users at all times. But I just realized root which is running my service processes doesn't seem to load it.My /etc/environment:
Code:
RAILS_ENV="production"
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games"
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Dec 5, 2010
I have written this script to monitor Apache2:
Code:
#!/bin/bash
#count lines that show apache2 but not the fgrep itself
let i=`ps aux | fgrep apache2 | fgrep -v grep | wc -l`
if [ "$i" -gt 0 ]
then
#log something
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It has all been working fine until recently when Apache is becoming unresponsive. I manually ran ps to check and there were 3 processes. However when I ran apache2ctl graceful I got the message 'httpd not running, trying to start' Is there a better way to check if a daemon is up?
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Feb 2, 2011
I'd like to share files between two Fedora 14 systems, but I'm having difficulty with making a share accessible via NFS.
Here's what I've tried so far:
Tried following mount commands:
Password:
Unable to find suitable address.
Used both the user and root password with this second mount command.
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Apr 12, 2010
how I could save all of the mail sendmail processes to a named pipe?
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Apr 7, 2011
Using Ubuntu server 10.04.2 64-bit all up to date.
I am running multi-threaded processes. These use OpenMP in my own code and the multi-threaded ACML maths library. When run in the foreground, everything is fine i.e. if I have set
export OMP_NUM_THREADS=8
then when I start all 8 cores are in use and things whizz along. However, when running overnight and logged out using e.g. 'at now + 1 minute' then the command, I am only getting about 130% CPU and it slows down accordingly. I have tried renice'ing and calling from within a bash script in case sh is doing something odd but nothing seems to solve it. I am sure that in the recent past this wasn't the case.
The libraries being used are shared versions in case that might have any bearing.
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Jan 29, 2011
How to get the permissions of any file systems
---------------------------------------------------
what does it mean?
"permission denied while opening filesystem"
through commands can we give/get permissions of file systems
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Nov 22, 2010
and also I need to find answers for following two questions.How to find mountable devices and their device files in Linux?How can I allow a regular user to mount a device in Linux?
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Jan 1, 2010
This post is not to ask for help, but rather to document my recent effort to downgrade my ext4 file systems to ext3 file systems. I don't know if it'll help anyone, but here it is anyway, fwiw.I am running ubuntu 9.10 on an older Dell GX-270, and had formatted my partitions with ext4 file systems. I began to notice partimage wasn't backing up my ext4 file systems and I decided to downgrade to ext3 file systems.My system has one 160GB drive and one 500GB drive. I also have an external usb2 500GB drive./home is on the internal 500GB drive. To convert it, I mounted an ntfs file system on the external drive, created a container file, put a file system on it, and mounted the container as a linux file system.
The backup was done done via rsync. rsync makes things really easy. It understands uids, gids, file permissions, and all kinds of links. That's one reason I created the container file on my external drive. NTFS doesn't understand uids gids, linux file permissions, or linux style links.
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Mar 23, 2011
I have more than 60 ubuntu systems in my network. I want to copy files from one system to other ubuntu systems. All IP addresses are listed in a text file. So what command can I use to complete the task?
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Oct 21, 2010
I have 2 different mounts. One points to a local windows share(NTFS ->Samba) and the other one points to a PPTP VPN connection sharing(I belive that is NTFS too). I use "cifs" scheme in my fstab to mount these. And I use my Debian box to copy between these 2 mounts. I have started using Rsync for that purpose, I think that it works fine for now. My main problem is that it looks like Rsync cannot figure out if the files are same or not in source and target folders when I use these mounts. Most of the time Rsync copies the same files and folders over and over again even though those files and folders are on the target.
I am wondering if there is a way to make this scheme work? Being on a Vpn connection(slow) a Windows box, Rsync could have save a lot of my time if it could have recognized the files and folders that are same on both ends
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Jan 21, 2010
Last year I was looking into fault-tolerant distributed file systems and I recall one kernel-based system that required a physical partition on each machine in the cluster, but would treat it as a single volume - ie. a write on one server would appear on the disk on all the servers.Unfortunately I didn't bookmark the specific system I was looking at, and now a year later I can't remember the details.What I don't want is NFS - a single file server with a file system mounted on various machines. What I do want is mirroring - one disk shared among multiple servers, so that if one server dies, it doesn't make any difference to the rest of them.
A bit of investigation turned up Red Hat's GFS, which kind of looks like what I want, but looks more and more like an NFS model to me. I was wondering what everyone's opinion of the various options out there were.
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Sep 29, 2009
I have 2 completely different processes A and B (they do not have any relationship) suppose A opens a file with file descriptor 4 and B opens another file with file descriptor 5
Can process A use the fd 5 (i.e using the file object of processs B) by any means..if suppose i let the fd 4 of process A to point to the file object of process B(fd 5) will it work? is it safe?
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Aug 1, 2010
so here's what i want to do. I have a harddrive with Ubuntu 10.04 on it, the biggest partition is a 242gb ext3 partition. I want to format a part of that to FAT, without loosing any data from the hard drive.Is this possible?
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Mar 12, 2011
I have noticed the (understandable) tendency of new Linux users to think about disk drives in the 'Windows way'; their first thought is to exchange a new drive for an existing one, rather than combine both drives for a larger 'file system'.
There are times when replacing one drive with another is indeed the correct action (aging drive, failing drive, slow drive, etc). But in other cases it may be preferable to use the inherent strength of the fstab (file system table) file to combine physical drives to become a larger 'file system'.
Lets first look at a user with an 8 gig netbook who is running out of space. Rather than replace the 8 gig flash drive with a 32 gig device, the old and new devices can be combined to yield a 40 gig 'file system':
This same principle can be applied to a user with a computer using an 80 gig hard drive, and who 'adds' a new 320 gig drive instead of replacing the 80 gig drive with the 320 gig drive:
This same principle can also be applied to building a massive 'file system' without the requirement of using RAID:
The above 12 terabyte system can be built using a basic motherboard with four open SATA ports and four 3tb hard drives. No server based equipment is needed; no raid hardware or software is required. This is just something that Linux does (and does very well).
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Jul 4, 2011
I'm trying to install the 32 bit ubmbuntu 11.04 on my pc, and the installation freezes at the 'Detecting file systems' message. i have tried installing on a pc that had windows xp, and i also tried a clean install on a formtted hard drive, and i still get the same problem.
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May 26, 2010
I have fedora12 on two pc's, i want to share some files between them which i was not able to do with nfs, so let me know the whole procedure to do that n also let me know where my shared files will be visible
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Jan 31, 2011
during the boot process mounting other file systems takes a while. Although it ends up resulting [OK] it was not like this before and it used to be was very fast. I took a look at /etc/fstab file which is posted below, and suspected that devpts is the problem. So I commented it out and reboot, but it wasn't helpful.
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Oct 5, 2010
I'm familiar with the software and hierarchy of the mount command but I can't find any info on why it is needed or preferred. What are the physical aspects of it? What is the burden of having files accessible all the time?
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Jul 23, 2009
I was wondering if it was possible to hide the File Systems from a user. So when then browse through folders or choose to save something the default folder is their "home" folder. I am using SAM Linux distribution and don't want my users to be able to screw anything up! I use thunar as my file manager and was just wondering if it is possible?
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Apr 29, 2011
I have to move files between two file systems /inst and /inst2.When I perform 'cp -a /inst /inst2' it copies everything even hidden files and preserves access permissions.But when I perform 'mv /inst /inst2' it also preserves access perms and moves everything besides hidden files.Questions :hy is so ?What tool to use when moving file systems from one fs to another (rsync) ?
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