Limiting the usage of a resource (memory, disk space, CPU time, open files, network bandwidth, …) by a process or a group of processes.

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6
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1answer
250 views

Limit the inode cache used by a command

I want to run a task with limits on the kernel objects that they will indirectly trigger. Note that this is not about the memory, threads, etc. used by the application, but about memory used by the ...
0
votes
1answer
36 views

How “Max open files” soft and hard limit are set for specific process?

I used the cat /proc/<pid>/limits command to check the Max open file hard and soft limit, but I want to know how this value will be set and can it be increased or decreased? Is this value is ...
0
votes
1answer
12 views

Proftpd classes don't work

If setup my proftpd server and all is working fine on 'full' speed. but I want to limit a certain IP range to a speed limit. So I've added the following lines to the proftpd.conf file: <Class ...
0
votes
2answers
28 views

File Size Limit

What is the maximum file size limit in rhel 32 bit OS, is there any OS limitation for the file size , if there is any limitation set then please tell me what will be for root & oaa.
23
votes
6answers
25k views

How do I limit the number of files printed by ls?

Is there a way to limit the quantity of listed files on a ls command? I've seen: ls | head -4 but to get head or tail to be executed I need to wait for ls to finish execution, and with directories ...
5
votes
3answers
12k views

Number of SSH connection(s) on a single linux machine

I landed up in a situation wherein I had to access a Linux machine via puTTY.I made various attempts to SSH but failed to connect to the machine. I then realised my colleague was accessing the same ...
1
vote
1answer
2k views

What are the effects of increasing hard and soft limits for ldap user

I've been having some instability issues with my LDAP server. I have ~2000 machines connecting to it. Using netstat -pant | grep slapd, I can typically see 1500+ connections from the clients to the ...
0
votes
0answers
44 views

How does WonderShaper Work?

I'm trying to limit bandwidth download/upload for my server (Centos 6.7). I had read some documents and these are suggest that I should use WonderShaper. So i had installed and tried but it has a ...
0
votes
0answers
19 views

CUPS limit pages per job

I am searching for a way to use Linux as a printer-server and i need to be able to limit the pages per printjob. So i for example want a maximum of 5 pages per job. No quota for a user or a timespan. ...
0
votes
1answer
30 views

`cpulimit` and `nice` not effective in limiting the cpu usage of a python program that contains heavvy computations using theano

I am running a program written in python that makes heavy computations using theano. As it is a very CPU-intensive program, it is disrupting all my other activies on my laptop. For this reason I ...
1
vote
1answer
32 views

How to handle broken link after file deletion.in /proc/<pid>/fd directory?

A process is creating huge number of log files and also deleting it. Many of those deleted files are having broken links in the /proc/pid/fd directory. Do these file handles need to be closed by ...
3
votes
2answers
962 views

Control Dropbox upload rate on the command line

I'm using Dropbox without the GUI in Linux. I would like to limit the upload rate, sometimes large files eats my internet bandwidth. Anyone knows how I do that?
1
vote
1answer
96 views

Chrome/Chromium crashes (“Aw, snap!”, segfault): “Resource temporarily unavailable”

Chrome/Chromium won't load any websites and just shows the "Aw, Snap! Something went wrong..." page. Some sub-processes segfault. When started in a Terminal, it will shows lots of these: ...
20
votes
3answers
896 views

Limiting a specific shell's internet bandwidth usage

I want update my linux in one shell but by default wget or axel in updater use all the bandwidth. How can I limit the speed in this shell? I want other shells to have a fair share, and to limit ...
1
vote
2answers
41 views

What is the default memory allocation for shell process by linux

What is the default memory allocation for shell process by Linux , i mean is there any upper limit for shell process or any process.
1
vote
0answers
40 views

getpriority returning different value on different hosts with same kernel version

I am running centos 6.6 on same type of hardware with kernel version "2.6.32-504.30.3.el6.x86_64" Has anybody seen this why the below code when compiled and executed gives a different value on two ...
45
votes
3answers
65k views

Why is number of open files limited in Linux?

Right now, I know that: Find open files limit per process: ulimit -n Count all opened files by all process: lsof | wc -l Get maximum open files count allowd: cat /proc/sys/fs/file-max My ...
2
votes
1answer
591 views

File descriptor limits in /etc/system vs /etc/sysctl.conf vs /etc/security/limits.conf on Solaris

Let me explain first what I understood. In Solaris 10, rlim_fd_max and rlim_fd_cur in /etc/system set the hard and soft limits at the system level. And /etc/security/limits.conf sets the limits for ...
5
votes
1answer
53 views

Can I set a resource limit for the current process tree?

Let's say I'm running on a resource-constrained system, and I want to ensure that the applications I run open no more than 10 files total. If I try to do it using setrlimit, something like: if ...
0
votes
0answers
77 views

IPTables if more than 30 connection in 1 minute ban IP for 1 hour?

I am trying to setup a firewall that limits to 3 connections per IP and also ban the IP for an hour if > 30 connection attempts in one minute. Is this all possible with iptables? So far I have only ...
16
votes
3answers
14k views

How to Throttle per process I/O to a max limit?

I'm looking for a way to limit a processes disk io to a set speed limit. Ideally the program would work similar to this: $ limitio --pid 32423 --write-limit 1M Limiting process 32423 to 1 megabyte ...
1
vote
1answer
109 views

How can I use arptables to limit the number of outgoing ARP requests a second?

End goal: Make a script that will limit the number of outgoing ARP requests in a second using arptables. This is to have the ability to not trip the ARP-limiting feature on Cisco devices. I want to ...
0
votes
0answers
13 views

Is it possible to have an IPA user/group in both security limits and nproc limits

I am planning to deploy cassandra to a set of Red Hat 6.7 machines but there was an additional requirement to use IPA user for the cassandra user. For the cassandra user we usually do some ...
8
votes
3answers
7k views

ulimit PICKLE: “Operation not permitted” and “Command not found”

I'm trying to increase the maximum number of open files for the current user > ulimit -n 1024 I attempt to increase and fail as follows > ulimit -n 4096 bash: ulimit: open files: cannot ...
8
votes
2answers
10k views

sudo: ulimit: command not found [duplicate]

I was using ubuntu 12.04 ,on which I run ulimit -n ,it is showing 1024, I want to increase my open file limit from 1024 to 65535,so I tried the following command: sudo ulimit -n 65535 but i get the ...
13
votes
7answers
4k views

Make disk/disk copy slower

Is there a method of slowing down the copy process on Linux? I have a big file, say 10GB, and I'd like to copy it to another directory, but I don't want to copy it with full speed. Let's say I'd like ...
4
votes
1answer
1k views

How do you increase MAXSYMLINKS

In a python script, I am creating a bunch of symbolic links chained together. example: link1->link2->link3->.......->somefile.txt I was wondering how you can change the max number of symlinks to be ...
1
vote
1answer
158 views

Why lsof reports a higher number of open files of user than what ulimit says should be allowed?

I have checked the result for user kpiserv [kpiserv@***** ~]$ lsof -u kpiserv |wc -l 5358 [kpiserv@***** ~]$ ulimit -a open files (-n) 1024 Why lsof reports a ...
5
votes
1answer
2k views

Httpd : no space left on device

I am using Fedora 17 and over the last few days I am having an issue with my system. Whenever I try to start httpd it shows me: Error: No space left on device When I execute systemctl status ...
6
votes
3answers
426 views

Externaly limiting number of CPU cores used

I need to externally limit a process/session to a certain number of cores. Are there any other possibilities than CPU affinity (I don't like the need to specify the actual cores) and cgroups (hard to ...
3
votes
1answer
131 views

How to limit speed of file copy?

I am copying huge file from NFS mount using dd: dd if=/mnt/nfs/image.img of=/dev/sda I need to limit the speed of reading from NFS. How can I achieve it? The only precondition is to use some easy ...
1
vote
1answer
236 views

cpulimit on a bash script which runs other commands

I have a bash script which runs other cpu-intensive commands . When I apply cpulimit on the bash script, the output of top shows processes for the commands inside the script still run without ...
0
votes
1answer
53 views

Relationship between limits.conf and LDAP?

This seems like a straight forward question: Is there a relationship between the groups defined in ldap ldif files and /etc/security/limits.conf ? I.e., does defining an LDAP user with ...
3
votes
1answer
436 views

Linux cgroups: limit CPU usage in absolute values which do not depend on CPU speed

I have a server with a 2.4GHz processor. And there are several cgroups, each one allowed to use 25% of CPU. That's equal to 600MHz. Then I replace the CPU with a faster one, let's say 3.0GHz. If I ...
4
votes
1answer
4k views

Difference between ulimit -n and /proc/$PID/limits

In Linux, there is open file limit. I can use ulimit -n to see open file limit, which is 1024 default. Then I also can see per process open file soft/hard limit by looking at /proc/$PID/limits. I see ...
1
vote
1answer
29 views

Does loginuid have any impact on process limits?

On CentOS/RHEL 6, when I start my daemon as root user, I see /proc/<pid>/loginuid of the process as 0 and when I start it through sudo, I see loginuid of the sudo user. Even if I do sudo su - ...
1
vote
1answer
41 views

Restricting CPU time of processes by executable path

Is there a way to restrict CPU time (duration) for all processes which are invoked by executables that are located in a certain directory? I would like to be able to auto-kill all applications which ...
7
votes
1answer
1k views

/dev/mmcblk0 partitions limit

I've just mounted a microSD card which has 17 partitions in my laptop and I'm getting the following error in the YaST partitioner: Your disk /dev/mmcblk0 contains 17 partitions. The maximum number of ...
1
vote
0answers
52 views

How can I define time limit to a user's group per session

I have the group ABC and I need to configure a time-limit to 2min per session for its members. Like a TMOUT is only for a user, but I need for a group). How can I define time limit to a user's group ...
0
votes
2answers
79 views

Is there a way to rate-limit an rsync user?

I have a user with a Shell account(with jailkit) that insists on rsyncing 500gb of data on a daily basis. Is there a way to limit that rsync to say just 2mbits per sec? If I have to do it by IP, how ...
4
votes
1answer
171 views

218TB XFS LVM filesystem. 144TB Free. Error message “No Free Space Left on Device”

I have a giant 218 TB RAID6, across LVM. It is actually 2 separate RAID6s joined together through LVM to form one giant RAID6. df -h shows all space was available, and I mounted to /share. I wanted ...
0
votes
0answers
161 views

threads limit on linux

My box is: x86_64 x86_64 x86_64 GNU/Linux Red Hat Enterprise Linux Server release 6.3 whan I run sample java app (does not matter how much java heap I provide!), it creates 2016 threads and dies with ...
1
vote
0answers
21 views

Limit cpu usage to one core [duplicate]

I want to run a server with user-written scripts. But these scripts should only use one core (which should be the one with the lowest usage because there will be many concurrent scripts). Also I need ...
2
votes
0answers
168 views

Process exceeding max open files limit

I am counting current open files by a process pid by :- cmd1:- ls /proc/$pid/fd/* | wc -l and then I am calculating percentage by fetching Max open Files limits. cmd2:- $ cat /proc/$pid/limits ...
-1
votes
1answer
33 views

How can I limit a log file to a certain number of most recent logs?

I know that you can limit the size of a file in respect to bytes, but I was wondering if there was a way to limit the number of logs within the file to, for example, the most recent 200 logs.
16
votes
3answers
30k views

Limit max connections per IP address and new connections per second with iptables

We have an Ubuntu 12.04 server with httpd on port 80 and we want to limit: the maximum connections per IP address to httpd to 10 the maximum new connections per second to httpd to 150 How can we ...
8
votes
2answers
9k views

How to circumvent “Too many open files” in debian

If I want to see all relevant log files of my apache2 server at once, I use tail -f /var/kunden/logs/*log /var/kunden/logs/*log /var/log/apache2/*log |grep -v robots|grep -v favicon But since those ...
15
votes
3answers
2k views

Is there an upper limit to the number of zombie processes you can have?

I used to work with an HP-UX system and the old admin told me there is an upper limit on the number of zombie processes you can have on the system, I believe 1024. Is this a hard fact ceiling? I ...
0
votes
0answers
185 views

Kill the process and restart server when memory is exceeded - bash and cron

I have a site on webfaction, using django and python. However, I have problem with memory. The problem arises, because I use external library, that can run forever (consuming much time and memory). ...
6
votes
1answer
525 views

Terminal does not accept pasted or typed lines of more than 1024 characters [duplicate]

When I enter text on stdin in an OS X Terminal, a single line is limited to 1024 characters. For example, cat > /dev/null beeps after I type (or paste) a line longer than this, and refuses to ...