Ubuntu Servers :: Force Kernel Selection Time-out?
Aug 7, 2011
I have set the kernel selection time out to 3 seconds. However, sometimes it just hangs indefinitely on the kernel selection screen until I manually select the kernel. This is bad news since it is a VM started up from a script and _has_ to start automatically. The VM is a re-constructed cloud backup made by rsync and re-running grub.
Is there any way to force Ubuntu to NEVER, under any circumstances, not time out on kernel selection.
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Jan 13, 2010
i use fedora9 and windows xp on my system when i reboot my system it comes a screen to select OS but i have just 2 seconds to select how can i change this time and also default OS
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Jun 26, 2010
First: I have just recently upgraded to 10.04 and I just noticed that my network icon in the top right tool bar disappeared. The one that monitors your wireless signal for laptops. How do I make that appear again?
Second question: How do I change the time selection at the beginning when I first turn on my laptop to choose between Windows or Ubuntu? Better yet, is it possible to make it infinite?
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Oct 14, 2010
Before I had to re-install, because I ran out of space on my partition and could not grow it, I had a setting that would not show the selection screen for the different kernels at start up.
Does anyone know how to set the start up as such that the selection screen does not show?
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Apr 13, 2011
Ubuntu hangs at start up.Im running 10.10 from a wubi installation - without any problems since. Now, I select the kernel, do ENTER, then I get the blinking big dos-like cursor (still normal)but when it should show the list of "checks".( I dont know how this is called where it checks services, battery state and comments everything with [OK]) it suddenly hangs. All I get is a small blinking cursor, but not more. I need to power down and turn my computer on again, then it usually works.
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Aug 23, 2010
I am currently running 9.10 ubuntu (gnome). I have a dual core intel chip at 3.00 ghz. My mobo is an ASUS P5ND2-SLI. My mobo will support up to 8gb of ram. Now, as we all know, 32-bit os/kernel will only support like 3.2gb, and 64-bit like 4gb. I'd like to install a pae kernel so I can get the most from my mobo, but honestly, I don't have a clue where to start looking for a pae kernel. I'd like to be able to select it from the list that already appears after the grub loads, and if I like it, be able to remove the rest from the list, or just make it default.
Question, in CPU-G, it says my architecture is i686. I don't know if that's the os/distro, or the kernel itself. it also lists the GCC version as 4.4.1 and Xorg as 1.6.4. my current kernel is Linux 2.6.31-22-generic. Again, I'm trying to find a pae kernel, but I don't know if my os/distro will make a difference, if the architecture is the kernel or os itself. I am still fairly new to ubuntu, and I must say, I've made the switch completely from windows.. which blows...
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Jul 31, 2011
I locked the screen, came back, typed the password, screen remained black, though cursor was visible and moving. Nothing I could do to rejuvenate the screen. Had to switch to tty6, sudo shutdown -r now. Then, on reboot obtained kernel selection, it proceeded to displaying kernel messages, but froze on sdb, after 3 secs. I figured it was the usb, so turned off, removed usb cables to external hard drives, but again it froze saying something about firewire mouse, the mouse is also usb. I tried several times, but no matter what kernel I chose, I couldn't get it to boot. So I loaded puppy live cd, but now it can't access some parts of the disk. I was running utorrent and the folder with partially downloaded files can be accessed but there's nothing there (there was), and some folders can't be accessed at all.
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Jun 27, 2010
installed Python 2.4 and then removed already present Python 2.6. After restart, when i selected the working kernel, that white ubuntu symbol splashed and screen went black with two small lines at the top.. it doesnt go beyond that. Please help me. I tried selecting other kernels. It did not work. I used "nomodeset" by editing the the kernel at the grub..
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Jun 18, 2010
How can I change the behavior of the selection buffer or a program that uses it ( I have xclip) to not send me text until the mouse button is released while clicking and dragging? This causes havok in the software I'm developing that tries to make use of the selection buffer. I need the full selection, not bits more bits more bits and then the full selection.EDIT: I cannot listen for mouse events such as button release outside of the GUI of my program.
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Oct 12, 2010
i have openSUSE 11.1 kde 3.5
I am wondering if there is a way that i can force all windows ( konuquor ) to open the same way every time such as detailed tree view
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Mar 4, 2010
I am having dual boot system(windows 7 and Fedora 12).When i switch on my system.It show the the timer 3 sec in order to get boot selection window(means window which asks that what to start fedora 12 or windows 7).I want to increase this time from 3 to 10 sec.
[URL]
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May 20, 2010
I have squid3 proxy and I want to define a default start web site that will be opened force only one time. Is something like it possible?
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Mar 23, 2010
what the recommended way to set up real-time (or near real-time) folder synchronization among 2+ servers. I looked a rsync but that doesn't sound real-time and it looks like its something that you might put in a cron once an hour.
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Feb 7, 2011
I just upgraded my storage server to maverick and it seems the 2.6.35-25 kernel doestn like the hardware im using
since im pretty sure its a hardware related problem and the previous kernel hastn the issue im currently booting this old kernel everytime i need the server by hand (using Shift during boot for the grub menu to appear)
well, it narrows down to the following question:
how can i exclude a specific grub entry - in my case the current kernel 2.6.35-25 - so only previous kernels OR future kernels from the next updates will have a chance to boot?
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Jan 20, 2015
Some weeks ago i hacked a old NCR all in one computer and installed modern hardware inside it, also installed and old VGA 13" B/W monitor inside (supports 800x600 max)
Then installed debian 7 i386 the installer runs fine, the problem is that after finishing the installation the monitor goes out of sync, the kernel load the i915 module and go out of sync.
So I have to connect another modern monitor and blacklist the i915 module, then get back to the internal VGA monitor.now the system boot fine to the linux console on text mode.
I plan to use this system from text mode (no x windows), the problem i found is that because i blacklisted the i915 module i don't have a /dev/fb0 so the console software i like to run like dosbox or scummvm canno't start because the framebuffer is missing.
What i need is to find a way to force the i915 module to a low resolution (640x480). This is what i tried.
vga=ask (or other options) this option is completele ignored by the kernel seem to by deprecated
passing grub options to the i915 module like video=VGA-1:1280x800 or modeset=1 also are ignored.
Theres some way to do this ?
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Jan 21, 2010
I have a loadable module, simple enough I believe it should run on any 2.6 kernel. I want to force the load and test that assumption. How can I do it?
ismod does not seem to notice the -f in 2.7 modprobe has -f but cannot locate the module.No go. So I read the manpage for modprobe which says: modprobe looks in the module directory /lib/modules/'uname -r'.So I copied MYMODULE.ko to /lib/modules/2.6.(the only directory in here) and type: modprobe -f MYMODULE.ko.Still can't locate MYMODULE.ko.I notice there are no other .ko modules in that directory; so I go in deeper to kernel/drivers/char, guessing about the char directory, and copy MYMODULE.ko there.
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Mar 29, 2010
I have several file servers in our offices and I am relatively new to Ubuntu / Linux. I get notices that there are updates for the server software from time to time. Is it typical to update everything when available or should I follow "If it ain't broke, don't fix it..." mentality?I would hate for everything to be working fine and then have an update throw me a curve.
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Apr 11, 2011
I am running my Ubuntu 32 bit server on top of Windows 7 64 bit with VirualBox. It's a 2 core Atom. It's been working good for about half a year. But the last about 6 weeks the system time only in Ubuntu is going slow. About -8 per 24 hours! I can only guess because I have more things running in my Windows 7 and Ubuntu.
I can set it right by coping the hareware time to system time with this command:
Code:
hwclock --hctosys
I want to run a crontab to have that command run every minute. But it don't seem to run.
[Code]...
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Mar 25, 2011
I installed Debian Squeeze on a laptop today, with the official i386 DVD1. At the end, I was very disappointed to notice the installer automatically chose the amd64 kernel (with i386 packages ? how does that work ?). The hardware is compatible, but I'd really like to use the i386 kernel instead. Earlier, you could choose the kernel during installation ; I looked in Expert install with no luck. Where is it ?
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Jan 11, 2011
I have a PCI compliance notice sitting here telling me to upgrade to Apache 2.2.17. Thing is, Ubuntu is quite happy sitting on 2.2.16 (Ubuntu).
I understand that the Ubuntu folks' reasoning in rolling security updates back to 2.2.16, but I need to get an automated scan to shut up.
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Mar 23, 2011
I have ubunto 10_4 X86-64 (I use putty to connect)
installed apps
screen
mysql server-client
my java program
open jdk* 64bit
apanche2 (the web server stuff)
and its aVPS machine
Xeon 2.0 64bit 4 GB ram
How can I make (or force) my java program to use more then 1 core? I would like it to be using just 5 of the 6 that I have. I use a .sh to run it this is the code for it.
Code:
#!/bin/bash
cd "${0%/*}"; java -Xshare:auto -Xmx2662M -jar craft.jar
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Feb 11, 2010
I have a system running openSUSE 11.2 with Desktop and XEN kernel, as well as Windows 7 (not by choice though...). I have noticed a strange time issue, with Windows 7 and the desktop kernel the time is correct (like for example now: 1:32 PM) but in the XEN kernel it is ahead several hours (6:32 PM). If it was an issue between openSUSE and windows then I would think that it is a problem with the system clock but I don't know what would cause a time issue between kernels like that.
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May 30, 2010
I have a 8.04 LTS server that i have installed a new 1TB drive. The server is running great but I am bit confused regarding the ln -s command and drive mounting. I have backuppc installed on the server and I am running out of storage space. To reolve this I moved the cpool and pool directories to the 1 TB drive and type from within the /var/lib/backuppc directory ln -s cpool /store/1TB/cpool this created the symbolic link to the new drive and everything works fine. I then rebooted the server and everything is runing fine but the drive does not show up in the df -h command, however the directories appear to be mounted fine.
I thought the drive would not be mounted automatically until it was defined in the fstab. Does the ln -s command force the system to automatically mount the directories but not the volume? This behaviour has caused me to delete my backup data becuase I was sure the disk was not mounted but is was!
[Code]....
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May 12, 2011
I'm trying to dump a mysql database on a small web server without killing performance. I tried using the nice command to give the mysqldump and gzip a low priority, but gzip is still taking up 100% CPU. Pages on the web server are loading incredibly slow. Here's my command:
Code:
nice -n 19 mysqldump -u USER -pPASSWORD DATABASE | nice -n 19 gzip -9 > OUTFILE.sql.gz How do I get gzip to run without taking up 100% CPU? I've attached a screenshot of top about 8 seconds into the dump.
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Mar 8, 2011
I'm a bit lost with the PHP/Sendmail configuration, maybe somebody could help me getting back on the right track. Following situation:
Postfix:
* accepts smtp on port 25 but from his own domains. Some policy and spamchecks through amavisd are made.
* accepts submission on port 587 and 465 from authenticated users only. Quota and spamchecks prevent outgoing spam.
So I'm enforcing a very strong outgoing spam-policy but the users are still able to use the php mail() function to send spam through the /usr/sbin/sendmail command.
My users have access to their own php.ini so my idea was to somehow enforce the delivery through the local postfix on port 587 or 465 and just let them enter their user/pass in their php.ini. (I suppose, their might be a cleaner-solution ).
Unfortunately, my configurations like smtp_host, port, user etc. are getting ignored if the sendmail_path line is active. But if I comment this line out, php just uses the default, which is the same as configured in the sendmail_path line - so it's active whether i use the line or not (setting it to an invalid command breaks the mail() function completely).
how can I enforce my anti-spam policy on the php mail() command?For my ssh users I just blocked the outgoing connection to localhost on port 25 which seems to work so far, but somehow the postfix-sendmail-wrapper just ignores this.
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Sep 30, 2010
I have a SSH server set up at home listening on port 22. I have hardened the server so it is pretty secure but I want to make it even safer by editing my iptables to rate-limit incoming connections and DROP false login attempts. I have tried these tutorials but I just cant get it to work:[URL]I want the debian-administration.org tutorial to work but when I try to add the first rule in terminal:sudo iptables -I INPUT -p tcp --dport 22 -i eth0 -m state --state NEW -m recent --setI get the following:Bad argument --set'I am new to iptables and I'm not sure if I'm doing something wrong when I try to set it up. I'm using Ubuntu 10.04.1 LTS with iptables v1.4.4.
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Nov 28, 2010
measure kernel space time and user space time?
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Apr 18, 2011
If there are users in a network who have desktop Linux (any variety), is there a way to configure their computers to "require" them to save documents to the network? Like for example, redirecting their /Home folders to a network file server or not allowing them to save files to their local hard drives?
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Apr 13, 2011
i have a vsftpd server running well but i want to make/force all users to use sftp and not just ftp is this possible?
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Sep 9, 2010
if I want to use an rt kernel in ubuntu studio, how do i use the kernel? say for instance, Ubuntu studio is installed with generic kernel.then i download the rt kernel.
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