Reputation
8,306
Top tag
Next privilege 10,000 Rep.
Access moderator tools
Badges
6 23
Newest
 Scholar
Impact
~530k people reached

Feb
25
answered Only two 2GB memory available on 64-bit Linux kernel
Feb
25
comment How can I dump the full system memory?
So you are going to dig through gigabytes of data looking for a few kb of text that may not even be there? Needle, meet haystack. In the time you spent on this you could have just retyped the text. If there was that much in the first place, then you should make sure your text editor is configured to periodically save a backup so you don't lose much if it crashes.
Feb
25
comment Does the sudo user need a home directory?
Of course the user has to have a home directory, or you couldn't log in as this user in the first place, so you couldn't run sudo. Also you know when you have the power to break the box not because of who you are logged in as, but because you ran sudo to obain that power.
Feb
24
comment How does kernel swapping / INT 13h interrupts work?
int 13h is just the bios disk read service.
Feb
24
comment How to turn off DELL BIOS beeping through Ubuntu?
Not if it is being produced by the bios. That module lets the kernel make beeps.
Feb
23
comment Is there any performance penalty to having multiple segments for one volume in LVM?
@jhfrontz, that could happen if the gap is small enough, but in practice, it is going to be many mb, which will be far enough that it won't be on the same cylinder.
Feb
22
answered zmodem not working without minicom
Feb
22
comment How does mdraid resync work?
+1 for figuring out why the drive was dropped.
Feb
22
answered Automatically run kpartx during boot
Feb
22
comment How to safely enlarge a gzipped file?
Why? And you could simply try it and see.
Feb
22
answered Is there any performance penalty to having multiple segments for one volume in LVM?
Feb
21
comment Is there any performance penalty to having multiple segments for one volume in LVM?
Actually there is a performance hit to having multiple PVs on the same device. At least last I checked, LVM does not realize they are on the same spindle, so will try to stripe volumes across both PVs. If they actually are on the same spindle, then this will cause a seek storm. Also the second allocation to extend the root almost certainly will be discontiguous since the other volumes allocated after the root will have used up the space following the root.
Feb
21
comment Is there any performance penalty to having multiple segments for one volume in LVM?
Wait, what do you mean by segments? You mean you created multiple partitions and used them as physical volumes, or you mean you used lvcreate to create the volumes, and LVM allocated a different chunk of the pv to each, and extended the root lv would allocate a second chunk, not contiguous with the first?
Feb
21
awarded  Necromancer
Feb
19
comment Setting the root password vs. sudo -i
@timpeterson, yes.. if you want a root shell instead of just prefixing an individual command with sudo, then sudo -i or sudo -s is the way to go. The difference between the two is that -s preserves your environment so for instance, ~ still refers to YOUR home directory, instead of root's. This is usually the preferred behavior. The su equivalent to this difference is su vs su -.
Feb
19
comment Setting the root password vs. sudo -i
@timpeterson, sudo is configured via /etc/sudoers, and the installer puts the initial user it prompts you to create in the admin group automatically. You should read the sudo man page for details.
Feb
19
answered Setting the root password vs. sudo -i
Feb
19
comment Setting the root password vs. sudo -i
I can't make any sense out of your mention of hash value.
Feb
19
comment Why does mount require root privileges?
The reason it's irrelevant is because how some devices work has nothing to do with why users normally aren't given access to them, and more importantly for the purposes of this question, why users can't mount a filesystem on them even if they are given access to the device.
Feb
19
awarded  linux