11,002 reputation
43463
bio website mattdm.org
location Somerville, MA
age
visits member for 3 years, 11 months
seen 7 hours ago

I've been using Linux and Unix professionally since 1995, mostly in Linux-related sysadmin/systems architect jobs supporting academia. I generally know my stuff, but am very happy to learn something new and to be corrected when I'm wrong. Currently, I am the Fedora Project Leader.


Mar
9
comment Can a Gnome Terminal profile use UTF-8 by default?
gnome-terminal defaults to using one process in which all the windows run, in order to save resources. So that's how it was tricking you there.
Mar
9
answered How can I increase open files limit for all processes?
Mar
9
comment How to tweak Linux to run reliably on flash memory?
Not an answer but a reference outlining some of the current problems with the state of the art: lwn.net/Articles/428584
Mar
9
comment Does grep use a cache to speed up the searches?
unix.stackexchange.com/questions/8398/… :)
Mar
9
comment Can a Gnome Terminal profile use UTF-8 by default?
Before, it was only getting set in the shell inside gnome-terminal. Now, it's getting set in the environment under which gnome-terminal itself runs.
Mar
9
revised Can a Gnome Terminal profile use UTF-8 by default?
added 655 characters in body
Mar
9
comment Can a Gnome Terminal profile use UTF-8 by default?
Then I am way off base. :)
Mar
9
comment Does grep use a cache to speed up the searches?
@Shadur — there is a way. See unix.stackexchange.com/questions/8398/…
Mar
9
comment Does grep use a cache to speed up the searches?
If you're doing a recursive grep, the inode and dentry caches make a noticeable difference. In a test, a grep within /usr/include took ~16.4 seconds on my system with all caches dropped. With everything cached, about 0.3 seconds. If I drop just the page cache (which holds the buffer cache), it takes ~14.3 seconds. If I leave the page cache and drop the dentry/inode caches, it's about 12 seconds.
Mar
9
comment Can a Gnome Terminal profile use UTF-8 by default?
In that case, I suspect that the system you are on simply doesn't have the right fonts.
Mar
9
answered log out/in because of google-chrome-stable package update?
Mar
9
answered iptables log file
Mar
9
comment Is locking the screen safe?
@user4724: what did you expect to happen?
Mar
9
comment How to view and change kernel memory size?
Please clarify what you mean by "the kernel's share".
Mar
9
comment Installed Fedora in dual boot Windows desktop. Now I can't get full monitor resolution with my AMD Radeon HD 6450
@jonderry — You could replace it, but once that card is working it's probably going to actually be one of the best choices for Linux. The F15 beta is in a month, and final release in two months. My recommendation is to just live with the reduced resolution until then.
Mar
9
comment How do I disable remote root login via ssh?
Simple: I avoid logging on to my machine from other people's computers. If I don't have my laptop, I use my phone. But this is all really a separate question. Another approach would be to use one-time codes or a software/hardware token.
Mar
9
comment How do I disable remote root login via ssh?
@acidzombie24: that's definitely more convenient, but how do you know their terribly-maintained windows system doesn't have a botnet with a keylogger looking for ssh passwords? Passphrases are not redundant because they don't ever leave your system. And you can use ssh-agent to make them more convenient (ideally with that cleared on screen lock or after a duration).
Mar
9
comment How do I disable remote root login via ssh?
(And FWIW, ChallengeResponseAuthentication no is the solution to that "screw case".)
Mar
9
comment Reinstall Fedora, keep files?
@jonderry — to put /home on its own partition, follow instructions here: docs.fedoraproject.org/en-US/Fedora/14/html/Installation_Guide/…, and if that's not clear, ask a new question. :)
Mar
9
comment Reinstall Fedora, keep files?
@jonderry — can you report the Fedora 15 install error at bugzilla.redhat.com so we can get it fixed?