Without being paranoiac, it seems possible to keep the memory content for some minutes after shutdown and dump it accessing directly to the hardware.So how to fill the memory with constant or random pattern before halting? Is there a kernel option that I can give at boot time , or an other tool I can install from Debian/Ubuntu to achieve this ?
View 14 RepliesI search many hours on the web for wipe my ram in a secure way and i find nothing good/secure/work exept URL... and i think it's the best solution for wipe RAM at shutdown!Im a newbie user and i want to implement this solution on my debian system at shutdown, i think its very easy because TAILS is based on debian! Does someone can put the procedures for get that on a debian box please?
View 8 Replies View RelatedI have looked all over the place but I can't find if this is possible. I am running Debian 6 as a media server (SMB) and it is tied to a UPS, I used gnome power management to set up a low battery shutdown but this UPS also is powering another embedded computer. So, I was wondering if it was possible to have a script run (to log in and shut down the embedded system) before gnome power management shuts down the Debian server. I know I could probably get it to run on every shutdown, but I am looking for low power only.
View 1 Replies View RelatedI'm running a Debian based distro.
When I run ipcs this pops up:
This happens only while KDE3 is running. Regardless of the runlevel, if kdm is not started, this will not show.
By running ipcs -p the PID points to process
Is there anything wrong with that command?
I've been using linux for a few months. Recently I have installed debian jessie and I'm learning how to secure my laptop. I have installed
Code: Select allapt-get install sysv-rc-conf
to shutdown few services that I believe I don't need at boot which I found very useful. Among others I have deselected avahi-daemon, cups, cups-browsed, etc. The problem is that, after rebooting, when running:
Code: Select allnetstat -lntup
I still find 'avahi-daemon: r' and 'cupsd' running. I have tried
Code: Select allsystemctl stop cups
systemctl disable cups
systemctl stop avahi-daemon
systemctl disable avahi-daemon
But after rebooting these services are aklways running. I do not know whta to do.
Output of netstat -lntup
Code: Select all[*]Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address      Foreign Address     State    PID/Program name
tcp    0   0 127.0.0.1:631      0.0.0.0:*        LISTEN   250/cupsd   Â
tcp6    0   0 ::1:631         :::*          LISTEN   250/cupsd   Â
udp    0   0 0.0.0.0:16409      0.0.0.0:*              526/dhclient Â
udp    0   0 0.0.0.0:68       0.0.0.0:*              526/dhclient Â
[Code] ....
I'm aware that cups seems to work just for my printer but I do not understand why I can't just disable it.
I'm using Debian Sid xfce on my lenovo laptop. When i try to shutdown, the screen always stays on (the fans turn off). It says "reached target shutdown", then this happens: [URL] .... and then it hangs. I have to press the power button to shut it down. (I have the same problem with reboot). I had the same issues with Jessie.
Things i tried so far and didn't work:
Code: Select allshutdown -h now
shutdown -p now
halt
poweroff
systemctl poweroff
init 0
I edited /etc/default/grub and added the following options at "GRUB_CMDLINE_LINUX_DEFAULT":
acpi=force, acpi=off*, acpi=noirq
*acpi=off: shutdown (not reboot) worked a few times but i didn't have wifi and power manager didn't seem to work
none of them worked..
I have no energy or wake up options at my BIOS.
I found out that i can normally reboot with the Alt + sysrq + REISUB key combination.
I'm running a Debian on a laptop (actually a netbook: Asus EEE 1001PX) as a cheap homeserver. However I'd like it to automatically "shutdown -h NOW" when I remove the AC plug (switch it off at the wall). Otherwise I have to ssh to it and call it myself, and that just sucks Can I somehow detect the removal of AC power and upon that run a script ?
View 8 Replies View Relatedon my netbook I've tried to make possible for my user to shutdown without needing a password. battery could run low when I'm not in front of it. Editing sudoers has allowed my user to shutdown the system, but Gnome still prompts me for the root password whenever root is logged in too. That's usually the case, because to avoid entering the root password multiple times whenever I need elevated privileges and not wanting to cache the root password, I keep a Root Terminal always open.
View 6 Replies View RelatedI'm using Debian 8.2 from a very recent download of the latest NetInst (less than 2 weeks). I'm sort of new to Linux - More accurately, I've used Unix and Linux extensively in the past, so most of my knowledge is dated. In particular, the whole systemd / systemctl paradigm is completely new to me.
Problem: I've added an entry to /etc/fstab to mount a NAS drive as CIFS. When I do a system shutdown or reboot, the system hangs for 90 seconds trying to unmount the NAS. If I manually umount the NAS prior to shutdown / reboot everything works fine.
I've done a fair amount of investigation and web searches, but haven't found a fix yet. Apparently several people were encountering similar problems about a year back, and it seems pretty clear that the root cause what ordering of steps in the shutdown process, e.g., WLAN being turned off before unmounting filesystems. This seems to have been resolved for most users (no one is discussing it any more), but I'm now running into the same issue. Ugh.
I tried to add a shell script to /etc/rc0.d to umount the NAS first in the shutdown process. This had no effect. I assume this is because the new systemd / systemctl paradigm supplants the old /etc/rc model of runlevel control, though it is rather baffling (to me, at least) as to why /etc/rc* still exists if the system is no longer using it...?
Here's some things I'd like to try, but how to proceed:
1. In the new systemd / systemctl paradigm, how do I examine and change the ordering of steps in the shutdown process? I've seen a lot of documentation on systemd, but nothing tells me how to do what I used to be able to do with /etc/rc with a simple rename of a symlink. If I knew how to look at the order of shutdown and change that ordering, I'm fairly certain I could identify and resolve this issue.
2. Is there some other way to mount my CIFS NAS other than editing /etc/fstab? Is it possible that my manual edit to /etc/fstab is the cause of this issue? My research into systemd indicates that it IS supposed to be compatible with /etc/fstab. I have not yet found documentation describing how to mount a filesystem at boot WITHOUT editing /etc/fstab ...
in configuring a fresh install of Squeeze. I discovered that it is possible to power off the system under gnome simply by pressing the power button or by selecting the "Shut Down" entry on "System" menu.However I need to restrict this option only to root. How can I do that?
View 7 Replies View RelatedI am using Debian sid 4.1.3-1 and when i shutdown the system it takes 3 - 5 minutes before actually shutdown, there is only a black screen until the hdd led start flashing and after that the system finally shutdown. The weird part is that sometimes it happen in less than 30 seconds , how can i figure out where the problem is ?
View 8 Replies View RelatedCreating a separate /tmp partition manually during install prevents a clean shutdown.
Setup: Debian 8 minimal server configuration (SSH only) using net install as virtual machine on Windows Server 2012 R2 Hyper-V (Gen 2).
1024 MB RAM, 20 GB VHDX, and 1 Processor, EFI boot
Packages installed: openssh-server, sudo, unattended-upgrades, bsd-mailx postfix
Application: IPv6 gateway using 6in4 tunnel
Symptoms: When shutting down the operating system (poweroff or reboot), the message
A start job is running for Unattended-Upgrades ( xx seconds / no limit ).is displayed on the console and will persist for several minutes before eventually timing out and shutting down.I've tried several different configurations. Any configuration that creates /tmp automatically (whole disk with single partition, or disk with separate /home, /var, and /tmp partitions) works fine and shuts down promptly. When I partition the disk manually (512 MB EFI Boot, 17 GB /, 3 GB /var, 512 MB /tmp, and 512+ swap) the problem occurs. I've narrowed it down to just the /tmp partition by testing and comparing various configurations (including/excluding partitions, placing partitions on a separate disk, changing the partition sizes, matching against automatic configurations, etc.).
I have also compared the /etc/fstab and /etc/default/tmpfs configuration file between working and non-working systems and cannot see any meaningful difference.
I have a Debian Squeeze installed on my old iBook G4 mid 2005. The computer has been giving me hard time and I want to sell it for parts. Before that however I'd like to erase the hard drive securely. Is there a software that this forum recommends for erasing hard drives completely and securely? Is there Linux equivalent for something like DBAN which can be installed on a CD and then boot the computer from it?
View 14 Replies View RelatedI need to restart my harddrive and reinstall debian.
View 8 Replies View RelatedWhen there is a total of 2 GB of physical RAM, how much RAM would you give to openSUSE-11.2 (i586) with KDE as a VirtualBox guest in Vista? There is no intention of running a second VM at the same time.
View 6 Replies View RelatedI have one desktop PC I'd like to use as a jukebox. It's installed in the basement as a black box, with only SSH access, and it has got a minimal CentOS 5.3 install with MPD and NCMPC. It's connected to the hi-fi in the basement, so I can stream music to it when I'm downstairs. Since I didn't want to use cables everywhere, I bought a PCI wireless card, with a RT2561 chip.
Until recently this card worked OK with Linux. Recent kernel version even have out-of-the-box support for it, except of course you still have to download the firmware from the Ralinktech website.
I gave the thing a static IP configuration by editing /etc/sysconfig/network-scripts/ifcfg-wlan0, interface went up fine, I can ping the machine and SSH into it OK. Now the only problem is, when I do a shutdown -h now, the machine "hangs" while trying to bring wlan0 down. (In case you wonder: I temporarily attached a monitor to it, since wanting to know what goes on while shutting down in an SSH session is a chicken-and-egg situation :)). I actually have to hard-reboot it (by pressing RESET).
i have fresh installed debian wheezy xfce4, and using slim to start it but i can't get reboot, shutdown and thunar can't open flash and others volumes. i using .xinitrc (exec ck-launch-session startxfce4)
View 3 Replies View RelatedI have installed a cluster computer with 10 nodes . The manufacturer is HP . All nodes and the master node have redhat enterprise linux installed in them . When I shutdown the nodes from the master terminal using "shutdown -h now" they get shutdown . But they dont get completely turned off . This issue bothers me when the power supply is given , all nodes boot up simultaneously generating a huge heat .
Thing to note : When we shutdown our PC they get completely turned off . When the power supply is given , a press on the Power On button is required to boot the system. But , why does it not happpen in the case of cluster? Is there any other way of completely turning off the nodes from the master terminal ?
Fresh install of Debian 6.0 (squeeze) and the memory shows 3.8 GB. I have 6 sticks of 2 gb on the board.
Pertinent dmesg lines: AMI BIOS detected: BIOS may corrupt low RAM, working around it.
3083MB HIGHMEM available.
883MB LOWMEM available.
Bios tests 12 gb of ram fine.
i need some information about how Debian 5 manage the physical memory . such as the memory management algorithms. i have googled it a lot but i couldn't find it.
View 1 Replies View RelatedI am having no luck configuring ProFTPd on a Debian Lenny production server we use to host our MySQL databases and a few websites. I had originally set it up so I could login and manage our internal sites, but I have the need to allow a few clients in to access their sites that we host. I am trying to root the users in their site directory, which would be "/sites/www.whatever.com/".
It just hit me while typing this. Is it possible to create a user without a shell to prevent login via SSH and set the home folder to /sites/whatever instead of /home/username? That would allow me to continue operating with my current configuration and root them in their site while preventing SSH logins.
i have a HP MSA 2312fc SAN with 2 LUNs configured. The first LUN (LUN ID 1) is correctly connected to the system, but when i connect the second LUN (LUN ID 30), i find in the syslog this message: multipathd: 8:64: size 6835937472, expected 5267578112. Discard
Here is the multipath.conf
[Code]....
So I correctly see the two luns, but multipath doesn't create the relative devices. Under /dev/mapper I see: control mpath0 mpath0-part1 mpath0-part1 is the first lun, the one I mounted in a directory under filesystem. I can't find the device for the second lun
I am *finally* getting around to rebuilding my file-sharing computer. I'll be sharing files with both Linux and Windoze machines. It's a home network, so there's nothing fancy needed. I know I have to tweak my smb.conf file until I'm satisfied with the features and security. I'm using SWAT and I'm starting with a bare-bones conf file. It's not secure but I can see the server and selected files/directories from my other Linux box.
My really dumb question is, do I have to reboot both the server and the client machines every time I change the SAMBA configuration? I thought I just had to stop and restart the SAMBA service in the SWAT software - but then the server disappears from my client. It looks like I need to reboot both machines for the client to see the server.
I have some errors when run the mount -all command: mount: wrong fs type, bad option, bad superblock on /dev/sdc5, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so Failed to open /proc/filesystems: No such file or directory
[Code]..
I have a PC104 running debian. I have 3 hard drives (in addition to the one booting) mounted in fstab by UUID. I use the options defaults,error=remount-ro. However, this means that when I boot with the hard drives not attached, I have to press Ctrl-D to bypass when the boot discovers the drives are missing. Is there a timeout commandoption I can add to fstab so that it automatically continues booting even if the hard drives are not attached? I could not find anything on a timeout command. (I tried adding timeout=1000 but no-random guess)
View 5 Replies View RelatedA week ago I opened this thread viewtopic.php?f=17&t=61580 in "Board index ‹ Help ‹ Installation" and asked for a moderator to move this to here. Because it hasnt happened up to know, I am reopening the thread here. It would be reeeeally great if somebody could help me with my problem!
I own two computers, one netbook and one laptop. I want to boot my netbook as a diskless client via PXE.I set up a dhcp-, tftp and nfs-server on my laptop but when i boot my netbook, the follwoing messages are displayed:(to make it more clear, i uploaded the whole output and shortened the output below)
[Code]...
I am using Squessze and Gnome. When I try to use the gui System>Administration>Network or Users and Groups I get the error The configuration could not be loaded. You are not allowed to access the system configuration.Everything was working before. I read around a bit. In some cases,it was caused by mismatching group and password files after using the gui. I do not know how to check if they are matching. Of course I do not know for sure that is the problem in my case.
View 14 Replies View RelatedI searched the forum for this, but didn't find anything about it: when I try to shut down the computer, it returns to the login screen. When I log back in and shutdown again, it shuts down.Squeeze works perfectly, but this is the only thing that doesn't work like it should. Is this a setting I should change somewhere?
View 6 Replies View RelatedOn my squeeze installation, when I shutdown my computer, there is an error message saying that "...cannot shutdown mysqld". I ignored it and there does not seem to have any ill effect.
edit: here is the exact message: "Stopping msql-server: mysqld failed"
Working with 8.2 DVD installation for about 5 days, Debian newbie. As subject says, screen goes dark and hangs indefinitely.
This guide: [URL]... similar to others I've read. I've done everything there to section: Status and Logs of Services, and that's as far as I've gotten.
Guide suggested posting some files, so here they are:
Code: Select all#
# Grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
[Code] ....