Fedora :: User Memory Allocation - Set A Maximum Limit On The Amount Of Ram A User Can Utilize?
Jul 24, 2009
I have a few multi-user servers in an academic laboratory. I am having a problem with some users maxing out the available RAM, causing such sever slowdowns the machine essentially crashes. My servers are Dell Power Edge's running Ubuntu 8.10 Server Edition (Not my choice). I would like to set a maximum limit on the amount of ram a user can utilize. This morning I experimented with setting limits via /etc/security/limits.conf and using ulimit. Neither of them prevented my test program, a simple infinite loop of mallocs, from crashing the server.
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May 9, 2011
When I run ardour sound editing I get this message , but it starts ok Your system has a limit for maximum amount of locked memory! This might cause Ardour to run out of memory before your system runs out of memory. You can view the memory limit with 'ulimit -l', and it is normally controlled by /etc/security/limits.conf
bash-4.1$ ulimit -l
64
my limits.conf is like this
audio - rtprio 99
@audio - memlock 250000
[Code]...
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May 12, 2010
I have a VPS server with 512 MB memory. The php.ini is set so script memory limit = 16 MB. However, I have noticed in my top report, instances like the following:
Quote:
5484 coldclim 25 0 46476 32m 5920 R 0.0 6.4 0:00.93 php
The bold number of 6.4 is the % of sever memory this process is using. 6.4 % of 512 MB of memory is about 32 MB of memory, so it appears that this isn't being limited by php.ini. Am I correct? This leads to the next question: Is there some way to limit the amount of memory a single suphp process can use? (Basically, something like the setting in php.ini which limits suphp processes in the same way.)
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May 17, 2011
My problem is I installed Zone Minder for camera security and I'm testing it on my laptop with the built in webcam and everything seems to work perfectly except when I try to view the live feed from the camera, it's just a black box. No video.
I checked this website and it's exactly the problem I'm having with a fix for it but his fix doesn't work. He says to type:
Code:
user@ubuntu:~$ sudo echo "256000000" > /proc/sys/kernel/shmmax
user@ubuntu:~$ sudo service apache2 restart
user@ubuntu:~$ sudo service zoneminder restart
But when I do the first line, I get this:
Code:
deemar@Clementine:~$ sudo echo "256000000" > /proc/sys/kernel/shmmax
bash: /proc/sys/kernel/shmmax: Permission denied
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Oct 29, 2010
Im trying to limit the diskspace users on the system may consume, and i found quotas (im a total linux noob). But when i try to set it, no matter what i set it to the maximus is 2 GB. Now... i need quite a lot more than that. One user should be able to use 1900 GB and the other 600 GB. How can i fix this? Im using ubuntu server 10.04.
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Apr 15, 2009
I've been looking for this feature for months and couldn't find a solution for this. Does anyone know how to create users and limit the user to a specified directory?
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Feb 14, 2009
I will be upgrading my RAM soon. What is the maximum amount of ram a 32bit OS can see?
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Nov 24, 2010
I'm trying to determine how to limit a specific user so that they are confined within their home. I'm also trying to figure out how to prevent a specific user from walking up to the computer and allowing them to log in, but still allow SSH. Basically I'm trying to provide an account with very limited access to the machine.
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Jun 13, 2011
I have a transcend pendrive USB of 16 GB . I installed Linux ubuntu and i am able to allot only 4gb for working with linux ubuntu. I want to utilize my maximum space of 16gb USB.Can i alot more disk space for Linux in my USb ?
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Apr 20, 2010
I am using malloc and frees a lot in my program. It shows its allocated but when i remove it doesnt show as the memory is removed(I am using the top command to view VIRT memory usage). If this continously grows what would happen to my program (Will it go out of memory?)
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Jul 8, 2009
My computer has a 2.80Ghz Intel Celeron processor and 498MB of RAM and 3GB of swap space. When I use Fedora 11 the user memory increases over time and even if I quit all the applications the user memory still does not go down. It eventually gets so bad that have to restart my computer.
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Jan 26, 2010
I'm running Fedora 11 (2.6.30.10-105.2.4.fc11.i686.PAE) 8 GB memory on a AMD Phenom(tm) II X4 965 Processor, 4 core server I just built.The problem I have run into is any virtual machine that has >1024 MB memory assigned to it will not boot. As along as it has 1024 MB or less it boots fine.The symptom you see is a very quick message "Booting from hard disk" the screen then goes blank, you can't login through SSH, and can't ping the network address so I know it's not some crazy video problem hiding the boot process.The attachment are messages from a failed boot attempt.
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Jul 1, 2010
tell me the maximum limit of connections FTP server
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Oct 1, 2010
it is possible if i can have sub-users in my server and can i allocate a limited amount of space only. For example i am the root of server and now i can add another user with name john and he should be able to use only of 2GB out of my total hard-disk.
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Mar 11, 2010
I am connected to a network via SHH. Now, i know how i can see which users are logged on as well, but how can i see how many times each user has connected? this refering to users that have logged on at least once
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Jul 11, 2010
Is there any way to limit user name to characters so when I create an account and if the account name is more than 8 characters long, it will not allow.
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Feb 10, 2010
I have some domains on a VPS server. Typical account memory usage for all domains runs at 50% of available, but I have a problem. One domain is causing me trouble because intermittently traffic will spike on that domain, causing so many requests within 1 min that I exceed my memory allocation for my entire VPS package. Apache is then killed but the virtualization software and Apache must then be restarted.
A sample snippet from tops right before the sever went down would like like this:
All of that memory usage adds up. I would like to "throttle" the number of processes that user/domain can run. I think this would be a quick and easy way to keep the domain from taking down my entire VPS. My understanding is that I could do this with the /etc/security/limits.conf file.
Is that correct?
I have never done this before. Do I want to set a hard or soft limit? I think if I wanted to limit the number of processes for "coldclim" to 15 I would add a line to limits.conf like this:
Code:
Assuming that is correct, can anyone tell me how the website would respond once it reached its limit? Would visitor queries become sluggish, or would the website not come up for them at all?
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Jul 12, 2011
i have a linux server which users connect to with SSH. my users only upload and download content from their /home folder.
Basicly, I want them to be limited to see and use only their home folder.
I read that it might not be a good idea to do so, since they nead read premissions to run programs and scripts, but again: they are only downloadinguploading content to their home dir.
How can I do it?
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Sep 29, 2010
Im using squid proxy server..i want to limit bandwidth for single user using squid proxy.
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Aug 3, 2011
Im new to linux and would like help or to be taught. My question is how do i limit users to their own directory for an example User andrew /home/andrew cant acess root or usr
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May 3, 2011
I ran into a user today that indicated that their company only allows them to log in through a terminal session once (no multiple logins). On second try their login window terminates. They are using putty.Is this being accomplished through PAM or sshd ( or some other method)?
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Dec 3, 2009
Is it possible to limit each user so that only one can connect via each username for ssh/sftp? I work with a small company where there aren't really enough of us to justify using a revision control system, but we don't want to accidentally step on each other's toes, so we'd like to try simply preventing more than one person from accessing a given domain at once.
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Jul 15, 2011
Once turned on and turned off the desktop effects was a change in the settings windows, always open windows in the maximum amount for all programs. How to Recover the initial setting?
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Aug 29, 2011
Limit every user to his own home folder only.I have a web server running 10.04 LTS and as a newbie in the world of server administration, I'm in a bind.Right now, I have three users. Root, which obviously has access to everything, and two other users that each own a website.For these two users, their website is located in their respective home folder in an extra folder they each have Read, Write & Execute permissions on. This is the only folder they can write to. They cannot delete it, or change anything outside the folder.
So far so good, except that by default, they can also read any file in the system, meaning they can navigate to my other websites' folders and read, for instance, the database passwords from WordPress config files.This is obviously problematic.The users access their files and folders through SSH with FileZilla.
How can I prevent these users from reading sensitive data, i.e. how can I restrict their access to only their home folder?The users must continue to login through SSH with FileZilla (i.e. no FTP solutions)Apache must still be able to access the user's folders (i.e. cannot chmod to 750)Folder containing the command line tools (/bin/bash I think) will probably have to be symlinked in the user's home folder?
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Nov 22, 2008
I am newbie for Linux I want to script for bandwidth Limite per user MAC based also how can i add user MAC and where to add? I want per user 16Kbps each user.
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Jan 7, 2011
I have a webserver with a few users on and i wonder how i can limit the bandwith usage for each user on my server ?
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Jun 24, 2010
I am a user of a cluster. I don't want root to see/copy files from my user account(obviously). Is that possible to limit the access of root to users account?
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Sep 13, 2010
How can i limit user to their mailbox in specific size.
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Mar 9, 2010
I running Squid 2.7. I using NCSA veryfication so only registered users may use proxy server. I want to allow only 1 connection to proxy for 1 user. Why not per ip ? Alot of users have dynamic IP's and i want to avoid password sharing beetween users. Any idea how to do it in squid ? Mb other autentyfication system connected to squid granting access to proxy server ?
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Mar 24, 2011
for create an user I put:
useradd username
passwd username
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