I'm looking into kernel exploits in recent years, approx 80% of them requires user.max_user_namespaces with a positive value.
This setting is disabled in CentOS since 6.X series, but enabled in all recent Ubuntu LTS releases.
The conclusion seems to be "Ubuntu is more easily exploitable" due to "user.max_user_namespaces" is enabled by default.
I'm wondering why won't Ubuntu disable that too? Is there any advantage to enable it in default settings?
Ubuntu keeps a symbol links for current vmlinuz and initrd.img, at /, but what's the point of doing so? And given that many people have their /boot on a different partition.
The default Ubuntu kernel -generic package doesn't seem to have symbols in it.
I'm trying to avoid compile a kernel with debug info manually.
Does Ubuntu provide a package with kernel debug symbols?
Upon my observation, seems new packages will first appear in security.ubuntu.com, but if you upgrade later, they will appear in XX.archive.ubuntu.com (depends on your config),
Was that true ?
How should I configure upstart runlevels ? Of course I could edit /etc/init/XX but that wasn't right way to do this, I think.
I can't find the manual for pthread_mutex_lock with man pthread_mutex_lock, is that something wrong with manpages-dev ? I got that package installed, but missing some manual.
Should I fire a bug to Ubuntu ?
Is it possible to drop built package from a PPA ? Without dropping the whole PPA ?
There's multiple package inside (not multiple version), I just want to remove one of them.
Another pressed config to find here .. auto reboot after installation
I remember there's some option allow you to fill current selection with colors , but I couldn't find it anymore
I'm using GIMP to copy some layer out of a PSD file, But the layers are badly named, So I want to select the correct layer by clicking on the item I wanted to copy.
Which tool should I use, And please provide a screenshot.
Another problem is that sometimes you just can't click anywhere on the image since its layered.
I copied a layer from another image file , and created a empty canvas to hold the image copied.
But when I create the new canvas , the default size was as same as the original canvas , where I copied this layer.
How can I resize the canvas size to exactly the size of the image I copied ? As you can see , it's already under selection , maybe there's some way out from here.
Or if anyone knows how to set the canvas size from layer , when you create the empty cavnas , it's a neat solution as well.
Is there a way to hide all other layers when you click on the 'eye' symbol ? It's like what Macormedia Flash does , display only the layer that you click on , all else is hidden.
Is there a shortcut key ?
I'm reading a PSD file with GIMP , now I want to save a single layer into a PNG file , but when I right click on the layer , there's no such option available.
I want the name of command running , e.g unzip to be visible through the title bar of gnome-terminal , but it seems to be impossible , if the application running doesn't set a title explicitly , even though I choose 'Replace initial title' option in the profile dialog.
I have a mic mute button on my Lenovo Thinkpad T420 , but it doesn't work.
So I tried xev command to monitor press event, and that key wasn't captured.
Is there anyway to fix it , like add raw key code ?
OS & Laptop
Ubuntu 12.04 , also hope it works on Arch Linux , but doesn't matter much ;-P
Thinkpad Module: X220 4290LY9
Kernel patch for Arch Linux
FINALLY
It's a little tricky , but with the kernel patch and acpid script , it works now.
The rest I need is a notify daemon like the one for output mute , but it doesn't matter much now.
How can I make part of the image transparent? I tried the "Color to alpha" option in GIMP, but it's not working.
I know in Photoshop you can erase the part you don't like, and make it transparent. Does GIMP support that?
After creating some text, how can I center it? I'm not talking about the text alignment inside the text box.
In Ubuntu 11.10 , i'm unable to see any USB device in VirtualBox , although i had the ext package installed , which is downloaded from oracle's site today.
Can i disable all libnotify related notification from Network Manager ? 'Edit Connection' dialog doesn't help out
I'm a big fan of Meta key , but in Unity interface , by pressing that key , unity's interface will show up , hindered further action with that key , e.g Meta + Tab.
Without hacking its source code , anyway to remove that shortcut key ?