When SSH'd locally into my computer (don't ask, it's a workaround), I can't start graphical applications without running: export DISPLAY=:0.0 If I run this first and then run a graphical application, things work out. If not, it doesn't work, there's no display to attach to. Is there a comman...

I use KVM to manage my virtual machines. I am trying to limit the resources provided for VMs. I am able to limit the CPU and memory allocated for VMs using libvirt/cgroups. Now I want to control the disk time allotted for each VM by applying some weights. I looked at blkio control from cgroups. S...

The above question can also be rephrased to, what is the use of the sudo command? man pages for sudo in the bash shell has the following description. sudo, sudoedit - execute a command as another user. This doesn't make any sense to me. Don't I have to be the root user to install from terminal?...

How to launch a GUI application (e.g. gedit) from terminal and detach it from there in one step?

I have installed Safari browser in ubuntu 10.10 using wine tricks. Now I wish to run a website which has flash contents. I am trying to install adobe flash but it is not working. Altho Is there any work around for this?

Here is what I do tree -R /Applications/NetBeans/NetBeans\ 7.0.app/ | perl -e 'while (<>) { print if /java$/ }' but of course this doesn't return the result I want. What I want is to display an executable java file along with its recursive directory so that I would know where that java ...

I sometimes download .deb packages from the internet and install them with dpkg -i package.deb If the packages have unmet dependencies. How can I install the dependencies automatically (similar to apt-get install package, and mark these dependencies as installed automatically instead of manually.

Are there any tools that improve the readability of ps in the same spirit as ack for grep? This would be especially on OS X where ps does not even have options such as --sort user. So far the nicest formatting I could come up with is alias p="ps -m -o pid,user,%mem,args" and pa="p -a" px="p ...

I have a monospace .ttf font I really like (UbuntuBeta Mono). Is there any way I can use it (or convert first and then use, if needed) for the console in freeBSD? I know there is usr/share/syscons/fonts, but it looks like they might be a different format? Once I install the font, how do I tell th...

I am trying to get virtualbox to install on a very touchy box. It keeps complaining. /etc/init.d/vboxdrv setup KERN_DIR=/root/linux-2.6.18.5 That runs and gives this error: Attempting to install using DKMS Creating symlink /var/lib/dkms/vboxhost/4.1.0/source -> /usr/src/vb...

Is there a way, either with grep or something else, to (in effect) combine grep -v and grep -A? That is, rather than include everything for x lines after a string, exclude everything. Quick reminder for those who forget their grep switches: cat file.txt | grep -v blah filters out 'blah', the...

okay all my looking around on the normal kernel site ftp can't find it. I need specifically, the PAE version. I am compiling virtualbox and if you don't use the right source you get this lovely: vboxdrv: disagrees about version of symbol struct_module

I have a lot of trouble lately installing on a box that i can't reboot or change the kernel. Is there any other package that supports gre tunnels (if the os supports ) that i can run on linux? Basically i want linux on linux. I can't yum upgrade or reboot.

Short version: In what circumstances is dd safe to use for copying data, safe meaning that there is no risk of corruption due to a partial read or write? Long version — preamble: dd is often used to copy data, especially from or to a device (example). It's sometimes attributed mystical propertie...