General :: Safety - Impose Restrictions To A Process On Linux?
Mar 25, 2011
Can I limit the system resources that a process can use on Linux? I want to configure the system to avoid that some specified processes use some system resources:
choose if a process is allowed to use network and Internet.
choose which files and folders that a process can read, write or execute.
choose if a process is allowed to use sound and graphics output, and printer.
I've used to check process list in windows to make sure that there's no process running which I don't know, or seems suspicious to me, so I was trying to do the same in Ubuntu 10.4 but actually I don't know what process should be running, and what process shouldn't be and I don't understand the process status if it's running or what as the processes have sleeping status. I don't download softwares from websites only Ubuntu software center "which is safe right?" but I search a lot and visit lot of websites, so I'm completely worried to get infected as I use my credit card, PayPal etc.. by the way I'm using "Google Chrome"
Is there's any software or something like in windows(Antiviruses) to read the content of the website before it loads?
I want to kill parent process after "fork()" method. but if I kill parent process with "exit(0)" method, main() thread is terminated as well so child prosess doesn't work anymore. Is there any way to kill only parent process without affecting to child process?
If a process becomes unresponsive in WINDOWS then we press "alt+ctrl+del" to invoke the task manager & then terminate the process.Is there any similar way to invoke the Linux Terminal so that we can end a process by the 'kill' command when it becomes unresponsive?
i have jsut setup a kvm virtual machine on my server. to connect to the VM from outside of the network i use ssh tunneling. what i would liek to know is if there is any way to create a new user with jsut ssh access. i dont want people to be able to edit files in ~/ or such. jsut need the user to estabilish the connection to the server
I am using internet web control through squid... All is working fine only some little bit issues.
(1) Sometime when i tried to open google.com or any site I got message (The requested URL could not be retrieved) Screen Shot Attached.) but again after sometimes same websites will open.
url
(2) I would like to block word 'sex'.. So I have edit squid.conf with the following acl
acl Blockword url_regex sex http_access deny Blockword
but problem occur in some websites where 'sensex' word found in url. Then squid block 'sensex' url content website also..
if anyone of you have shifted using Paid Red Hat Linux with CentOS, and what are your experiences of moving from Paid Linux to Unpaid Linux CenOS. When do you suggest a person use Paid Linux and when to use Unpaid Linux?
I am new and recently almost one month back installed debian linux stable 8.2 came from windows. Today I upgrade my debian stable 8.2 to testing and everything works fine. Just one thing is that I checked kernel and find :
uname -r
4.2.0-1-amd64
dpkg --list | grep linux-image
ii linux-image-3.16.0-4-amd64 3.16.7-ckt11-1+deb8u5 amd64 Linux 3.16 for 64-bit PCs ii linux-image-4.2.0-1-amd64 4.2.3-2 amd64 Linux 4.2 for 64-bit PCs ii linux-image-amd64 4.2+68 amd64 Linux for 64-bit PCs (meta-package)
I am first time removing old kernel so cant take risk from searching the solution from google so come here, what and how to remove that includes everything like kernel image and other old kernel files not needed.
One more thing I just realised and saw on details in settings gnome that
Base : Debian GNU/Linux stretch/sid 64-bit
Is this right as it says sid in the line but i just changed my sources.list to testing only and then aptitude upgrade and full-upgrade then just.
I've been dual-booting win7 and ubuntu on my comp for a while, but didn't bother updating grub. I just updated to grub 2, but it wouldn't let me boot and said my hard drive was missing, also giving me a grub safety command line.
I have a high priority service that I start with sudo nice -n -10 process. This process does not need superuser rights though, except for the priority elevation. But nice requires superuser privileges to elevate priority.
Description of what the code does or what i intended to do:
1. Created a child process from parent process using 'fork()'
2. Sent a signal 'SIGALRM' from child process to parent process using 'sigqueue' function.
(The Third parameter of 'siqueue' function contains the message (message msg) which the child process wants to send to the parent process.'msg' is a stucture instance containing a) pid of child and b) string) 5. Print the 'msg' sent by child process inside the signal handler function 'sig_action_function' of the parent process I am getting some junk value when this line is executed
Code:
printf("%d ",msg->cpid);
I expected to get the pid of child process, which the child process sent to parent process through the signal.
as we all know Process Scheduler does Process scheduling and its a process as well. I was just wondering that if this happens then the Process "Process Scheduler" should be a part of Process queue as well.
So if there are 5 process are there in Process queue & process scheduler is administrating them then since its also a process, once it puts a process under RUN state it should itself go inside queue because at one instant only one process can get executed on a processor. This is quite confusing for me. Please help me out. I tried to search on this but could not find any relevant topics.
I have a process running on Linux.When i do ps -eaf | grep <myProcess>, it show muliple entries for <myProcess> with different pids for each entry.Kindly tell me what could be the reason for a process having multiple pids?
I've been running my shellscript for about half an hour now. It's taking longer than I thought to process all the data. I have the process ID of it. Is it possible to save the process and log out then log in and continue the process? I know how to pause a process using kill -pause pID and continue it using kill -cont pID. But that only work if you don't log out after pausing it.
I try to understand the reasons for restricting DVD and MP3. My conclusion so far is that DVD is restricted due to software patents (and the DMCA). The software decoding DVD is open software, though. What is the situation regarding MP3? It is also restricted. Is it due to the same kind of software patents? As I understand, the MP3 codecs are not free software (like DVD)?
How can I get rid of all policykit restrictions that fedora 13 has? I just upgraded from fedora 10 and of course my freenx sessions are again unable to do anything useful like mounting a drive. Difference is no GUI now to help fix this. So I would like to get rid of all restrictions.
I usually use .htaccess to restrict access to directories. But what if I just wanted to secure a single php file? Is there some sort of code that would allow me to say ONLY THIS IP can access this PHP file?
