General :: Directly Access RAM Not Under Control Of System?

Feb 18, 2011

We have a system with 1 GB memory. Out of this, i would like to restrict only 512MB for linux and would like to access the rest 512MB directly from an application that runs on linux.

What is the suggested means to achieve this on 2.6.x?

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General :: How To Directly Control My Touchpad

Sep 5, 2010

I had a post about how my "e" key turns my touchpad on/off as well as typing the letter "e". For some reason it generates two keystrokes. So, I was wondering how the operating system (I'm using openSUSE distro) controls the state of the keyboard. I assume somewhere there's a way to say "keep touchpad on at all times", or even better "when toggling touchpad if touchpad is off, turn it on"... Somewhere I think deep within the OS. Does anyone know where I can go to change that?

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General :: Can I Uninstall Another System Distro Directly Over Mint On Dual Boot

Feb 18, 2010

I think the title says it all really - I've installed Mint onto a Acer aspire 5315 laptop. Its a dual boot system using Vista Basic. Grub works perfectly and to be honest Mint is great. really enjoying playing and learning. My problem is that the laptop overheats when using Mint - the cpu fan doesn't cut in and the laptop shuts down to protect the system. According to a swift google this seems to occur with mint (possibly particularly with Acer's) and maybe with other distro's too. However I'd like to keep trying to see if i can find one that works.

So my rather obvious newbie question is can I just get another distro dvd and install this onto the partition containing mint thus deleting the previous install? If I did this would Grub show the new distro ok or would it keep searching for Mint. I have a back up so if all else fails I can reinstall everything but that will have to wait till I get home

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General :: Access Control Through Squid?

May 28, 2010

I'm using squid for proxy server in FC6. I'm also using squidGuard for web-site access restriction. I want to do some exception now for website access. For example, squid user1 with ip shoud not access while all other squid users with ip, and so on... can access since is not listed in squidGuard .db files

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General :: LDAP Access Control For Users ?

Feb 16, 2010

I'm using Sun One LDAP server, (Soon to be moving to openldap). I have one Master server, no slaves, about 60 user accounts.

I'd like to add an attribute to each of the users DN's to restrict there ability to login to specific hostnames. I.e. I have hosts A, B and C. Dev staff can access A and B, but not C, and support staff need to access all of them.

I found a link at [url] which talked about using 'hostsallowedlogin' and 'hostsdeniedlogin' attributes but I'm presuming these are bespoke. If they are, how do you configure the ldap.conf to take note of these attributes when authorizing access?

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General :: Booting After Reinstallatig Debian / Cant Access Tty Job Control Turned Off?

Aug 2, 2010

due to low disk space there arose a problem. Now I re-installed Debian along with winXP as dual boot. XP works as it was before. but i can't open Linux. When i select Debian on boot-select page, Debian starts but stuck at a point as shown below:

check root= boot arg cat/proc/cmd line
or missing modules,devices:cat/proc/modules ls/dev
ALERT!/dev/sda3/doesnot exist. Dropping to shell;
Busy Box v1.1.3(Debian 1:1.1.3-4) built-in shell(ash)
Enter 'Help' for a list of built-in commands.
/bin/sh: Can�t access tty; job control turned off.

i hv searched a lot but couldn't come up with a correct solution.i tried editing the grub by pressing 'e' when grub is displayed and added the line acpi=off irqpoll and then start booting. but the result was same.

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Ubuntu :: Mikrotik - Control Access To Bind Mac Address With Ip Address And Control The Band Width For Individual Connection

Feb 14, 2011

i have a xeon machine with ubuntu os machine specification is 3gb RAM 3 scsi hard drives each 73gb it have two ethernet cards one ethernet card is connected with adsl modem and the second is connected with LAN. now what is mikrotik doing for me is control access to bind mac adress with ip adress and control the band width for induvisual conection.

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General :: Control The Cpu Usage For The Whole System?

Jul 12, 2010

I want to control the limit of cpu usage of the whole system to a certain percentage, similar to cap the VCPU usage of a virtual machine. Is it possible?

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General :: Can Keep The System Load Under Control During The Deletion

Mar 27, 2010

I generate more than 50GB of cache files on my RHEL server (and typical file size is 200kb so no of files is huge). When I try to delete these files it takes 8-10 hours. However, the bigger issue is that the system load goes to critical for these 8-10 hours. Is there anyway where I can keep the system load under control during the deletion.I tried using

nice -n19 rm -rf *

but that doesn't help in system load.

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Networking :: Directly Access Received Packets In Buffer?

Mar 29, 2011

where packets are stored when they're received. After some googling, I think perhaps libpcap with mmap would be the solution. Does libpcap 1.0 and above support mmap?From my understanding, mmap would allow me to directly access the buffer without having to explicitly copy the packet to another buffer for me to do processing. I would also appreciate it if someone can let me know where I can find examples of such applications, as many examples of mmap I've found involves mapping a buffer for file operations, rather than integrating it with pcap functions like pcap_loop, pcap_next_ex etc.

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Server :: Setup VSFTPD On Centos 5 To Access /var/www/ Directly

Sep 26, 2010

Trying to set up VSFTPD on the CentOS 5 box at work, which is an internal web development server. I'm leaving soon, and all knowledge of or desire to learn SSH is going with me so the other employees will need to be able to access the web root using FTP clients.

Essentially there is no need for special user accounts or privileges, it's an internal server in a tiny company. I've got the LocalRoot set to /var/www/ which I can log in to and read all files via FTP, however despite setting everything to 777 in /var/www/ and below, I still can't get any write privileges on the FTP server.

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General :: Get Back The Control Of The Screen/keyboard On System?

Aug 24, 2011

I have a Linux system running (Debian). It is working perfectly from a remote point of view. I can ssh in it, it has the imap running correctly, and a couple of kvm systems running (I can also ssh to them). Well, it works!

But when I go in front of the keyboard/mouse/screen there's nothing. No way to switch between the consoles with Ctrl+Alt+F# (X is not running on this system). The screen is desperately black. But the screen does not go to sleep mode, it still has its green led on! I guess it means that the graphics card still sends the H and V syncs correctly (VGA connection).

Is there a process that is blocking the display and prevents me from getting the control?

Note: Last time I used the console, it was in console 1. Ctrl+Alt+F1.

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General :: Does Versions Control System Work On Server Or Per Website

May 26, 2011

I tried hard so that I can stay away from version control but in almost good job specifications, I find version control as requirement. So I thought I had to start from somewhere. I always tried to read it but haven't got much luck with it. So I have few problems to ask. I am confused and I really want to know how can I use version control in my context and how will my working environment change with it.

I have Linux VPS Server. I use capnel/whm to create sites in php/joomla. So is version control a software or script which I can install on my linux box like ./configure. Or I have to install it on every site like any framework I use Dreamweaver to edit files via FTP. Now if I install version control then do I still use same method to edit files or then method gets chnaged What about the database like MySQL will it stays same or its also version controlled Will version control make my system slow and how much space it uses on my server.

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General :: System Monitor - 170+ Processes - Large Ammounts Of Ram - Cpu Out Of Control

Jul 9, 2010

Title sums up my problem. Im running so many processes in Slackware, running KDE. I dont even run that many programs, and already its more than XP has (by a **** load). What is wrong here, and how do i kill a lot of the processes to cut down on my cpu usage by tons and cut down memory usage while still keeping everything the same?

Heres a picture of my system monitor - img651 DOT imageshack DOT us/img651/5994/systemmonitorz.png

I didnt put image tags because its a fullscreen.

The memory rises over time, when I restarted my computer it was up to 500 - 600 mbps. At the minute after its at 360.

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General :: Keyboard - Swap Fn (function) And Control Keys In System On A Macbook Pro?

Jan 24, 2011

I don't care if this is done in the bios or a kernel module or software. Is there any way at all to do make the 'fn' key act as 'control' and the 'control' key act as 'fn' in linux running on a macbook pro?

PS. You can do this with software in OSX with the application KeyRemap4MacBook.

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Fedora :: System Is Not Booting Directly From DVD

Sep 2, 2010

I have windows XP with my system, I downloaded Fedora 13 X86.iso image from bit torrent.also GPG keys in this image are 0 byte size. I burned it drectly to DVD. but sytem is not booting directly from DVD even though i changed bootup setup priority to DVD.

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Ubuntu :: System Directly Boots In Win 7

Aug 14, 2011

I installed ubuntu inside windows, thing were going good, till windows got affected with virus, so had to reinstall it, now boots directly in windows 7. I have a 500 GB HDD with two equal partitions,
C: drive has windows
D: drive has ubuntu
I tried the boot-repair, didn't work, instead it corrupted windows boot, which got fixed using startup recovery but I want ubuntu back...

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OpenSUSE Install :: Reboot Directly To Another System?

Jul 7, 2010

in a previous version of openSUSE (I think it was v10.3), there was a possibility to directly/automatically start another OS after exiting (rebooting) openSUSE. This could be done through "right-clicking" on the Reboot (Restart) button from the KDE's log-off dialog and choosing the OS you wanted to be started after the restart. Please, does anybody know if this is possible in openSUSE 11.2 (KDE 4.4)? PS: I know that GRUB enables that, but I prefer a "GUI way" rather than using command line and editing configuration files

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Ubuntu :: Like The System To Boot Directly Into Xbmc?

Apr 30, 2010

I've bought myself an Acer Revo and have 10.04 running nicely on it. After some basic tweaks I have 1080p content playing flawlessly.However, I'd like the system to boot directly into xbmc (no gdm etc). Can anyone suggest how this might be achieved?Under 9.10 I used a minimal install and edited /etc/event.d/tty1 to login a user. .bash_profile was then edited to start xbmc.

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Software :: Enable X11 Forwarding If SSH Directly Into The System?

Mar 15, 2011

how to enable X11 forwarding if I SSH directly into the system, for example:

ssh -X server1

However, I'm trying to get X11 forwarding on a system I don't have direct access to. I need to first SSH into a server I do have access to, server2, then from there I can SSH into server1. I know about port forwarding but I'm not sure how it works with regards to forwarding X11 windows. For port forwarding server1's web page, I'd do this: ssh -L 9999:server1:80 mylogin@server2

Then opening [URL] on my computer would bring up server1's webpage. What is the equivalent SSH command for X11 forwarding so if I typed it and executed gedit for example, that program from server1 would pop up on my Desktop?

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Ubuntu :: Can't Choose Between Xp And System When I Restarted Pc Login Directly / What To Do?

Jul 2, 2010

I reinstall ubuntu but when i restarted my pc is login directly into ubuntu i can't choose between xp and ubuntu ....what can i do?

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Server :: How To Control Windows System Under System Like Active Directory Authentication

Jul 18, 2010

How to control a windows system by using linux server i know linux is a cross flatfarm. But how to Authenticate windows system like in windows we use AD for user authentication.

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Networking :: Control Bandwidth Access With Squid - Allow Certain IPs To Have Higher Bandwidth Access?

May 27, 2009

We have a sipmle office network set up that we also use use to connect to the internet, however of late the number of users has increased thus slowing internet access. Bandwidth upgrade is not an option thus i have to do bandwidth shaping on our linux router. The question is how do set the squid configs to allow certain IP's range a certain percentage bandwidtheg 60% and furthe divide the rest. Alternatively how can allow certain IPs to have higher bandwidth access.

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Ubuntu :: Cant Access Tty Job Control Turned Off?

Jul 22, 2010

I am getting the following error after booting my Ubuntu machine. Worked fine recently and after I upgraded some stuff when I rebooted the machine I got a green screen then hit an arrow key and got the following error message:Gave up waiting for root device. Common problems:

- Boot args (cat /proc/cmdline)
- Check rootdelay= (did the system wait long enough?)
- Check root= (did the system wait for the right device?)


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Debian :: /bin/sh: Can't Access Tty; Job Control Turned Off (initramfs)

Jul 19, 2010

I'm trying to "repair" two Debian Lenny servers a friend of mine had installed and working fine, all of a sudden he calls and tells me the servers don't boot. He's getting this error messege on both, weird:

/bin/sh: can't access tty; job control turned off (initramfs)

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Debian Configuration :: How To Control Access To Different Services

Dec 25, 2010

I'm trying to control access to different services on an Debian server using /etc/group. So that a user I create for FTP usage doesn't fill up my server with IMAP folders or samba garbage.

Services like proftpd have:

AllowGroup ftpgroup

sshd have

AllowGroups sshgroup

And samba have

valid users = @smbgroup

But I can't find the correct option in Dovecot (/etc/dovecot/dovecot.conf) Do anyone have the magic option or a workaround thats doesn't envolve maintaining seperate user databases and password?

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Hardware :: Users Have No Access To Volume Control?

Sep 21, 2010

I am using Debian Lenny on a cluster. If I log in as a regular user and try to adjust the volume on the top right panel (Using Gnome), I get the following message"The volume control did not find any elements and/or devices to control. This means either that you don't have the right GStreamer plugins installed, or that you don't have a sound card configured.You can remove the volume control from the panel by right-clicking the speaker icon on the panel and selecting "Remove From Panel" from the menu."or ifenter "gstreamer-properties" in the terminal and do a test I get the following message"Autodetect: Could not open resource for writing."

if I become the root user and enter "gstreamer-properties" in the terminal and do a test, the test works. Alsamixer works as root, but not as a user.My user error for alsamixer i"alsamixer: function snd_ctl_open failed for default: No such file or directory"I am not sure what setting I need to change to which all users can adjust the volume. Problem 2:When I put in a usb stick I get the following error as a user.Cannot mount volume

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Security :: IP Blacklist(s) For SSHD Access Control

Nov 4, 2010

Quick explanation about what this thread is: by way of an article featured on linuxtoday, I learned about what appears to be an actively managed IP blacklist: [URL]

# This is a compiled list of dirty hosts associated with
# bruteforcing attempts, spam, botnets, RBN and the list
# continues to grow. The data is comprised of information
# compiled from Arbor Networks, Project Honeypot, FIRE
# (, Host Exploit, Shadowserver and
# a variety of other similarly based sites.

Quick explanation about what this thread is not: this is not intended to be a discussion about default deny vs. default allow (i.e. whitelists vs. blacklists), nor is this a call for enumerations of your own sshd hardening strategy. Please try to keep on point. That said, can anyone speak to the quality of the blacklist information noted above? And/or are there any suggestions for a readily available blacklist of "known better" quality? I plan to try including an actively maintained blacklist like this into a multi-layered approach for hardening an sshd bastion host.

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Server :: User Access Control To Internet

Sep 29, 2010

Am using Suse 10.2 for internet and e-mail server. currently all my users have access to the internet if they know how to setup their web browsers. how do i deny some users internet access so that a user can only access his/her e-mail but not internet.

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Ubuntu Installation :: /bin/sh: Can't Access Tty: Job Control Turned Off Error?

Aug 14, 2010

i have been using windows xp and ubuntu simultaneously for more than one year and everything was working fine.Recently, i have just installed windows 7 and this has wipe out the ubuntu os selection screen (GRUB) and windows 7 boots in automatically.Moreover, while trying to install ubuntu again, i get the following error while booting the ubuntu cd:/bin/sh: can't access tty: job control turned off

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