778 reputation
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bio website
location Rio De Janeiro, Brazil
age
visits member for 5 years, 3 months
seen Jan 30 at 21:40

Jul
27
comment Our security auditor is an idiot. How do I give him the information he wants?
Looks like you have a problem with these kinds of people: serverfault.com/questions/268542/…
Jul
17
comment Why is Internet access and Wi-Fi always so terrible at large tech conferences?
@dlamblin: there are 4 non-overlapping channels: 1, 5, 9, 13.
Jul
5
comment Ping “replies” from same computer with 'Destination host unreachable' (no route to other computer)
I have seen an AP where if you set "Group Key Update Period" to a nonzero value (enabling it), after some time (probably after it had changed the group key) it started causing problems with ARP, which only went away if you rebooted the AP. Took me some time to figure out "hm, so THAT is why it was zero by default - a nonzero value does not work correctly on this AP, so they simply changed the default!"
Jan
2
comment With what tool should I format a hard drive as UDF?
Related question: superuser.com/questions/39942/using-udf-on-a-usb-flash-drive
Jan
2
comment With what tool should I format a hard drive as UDF?
Do not forget to zero the MBR first (dd if=/dev/zero of=/dev/sdx bs=512 count=1), to avoid confusion with any leftover partition table (since UDF does not use the first sector).
Oct
27
comment Mount hybrid ISO (ISO 9660/HFS+) under Linux
A related blog post I saw recently: rwmj.wordpress.com/2009/10/25/…
Oct
16
comment What does the “//” in “http://serverfault.com/questions/ask” stand for?
Can you really have a clock running counterclockwise, as clockwise is by definition the direction a clock runs?
Oct
16
comment Linux - What directories should I exclude when backing up a server?
WARNING: only do this if the partition is unmounted or mounted read-only. Dumping the raw contents of a partition while it is being written to can end up with a badly inconsistent filesystem on the backup (because blocks near the beginning of the filesystem are copied "earlier" than blocks near the end, and the filesystem algorighms do not expect this; you can avoid this problem if you can somehow do an atomic snapshot of the filesystem). fsck will not help you, since its algorithms also depend on the order the filesystem writes to the disk.
Oct
16
comment What does the “//” in “http://serverfault.com/questions/ask” stand for?
Another relevant slashdot comment: tech.slashdot.org/comments.pl?sid=1404183&cid=29744723
Aug
3
comment Building a local time server
@mas: there is another radio broadcast time source which should work in most of the world: GPS
Jul
29
comment How do I delete a locked file in Windows?
Be careful with solutions which close the file handle, since they might cause unpredictable corruption. See technet.microsoft.com/en-us/magazine/… for details.
Jul
29
comment Force file deletion on Windows
Be careful with solutions which close the file handle, since they might cause unpredictable corruption. See technet.microsoft.com/en-us/magazine/… for details.
Jul
5
comment Is X.Y.Z.0 a valid IP address?
These must be using firewalls configured by the same kind of people who block all ICMP and end up breaking PMTUD, or block all "invalid" TCP flags and end up breaking ECN.
Jun
30
comment Have you ever used Sneakernet?
Direct link to the original article: notes.co.il/benbasat/10991.asp
Jun
30
comment Where do I find other drives on Ubuntu?
It's not just Ubuntu, it's in the FHS: pathname.com/fhs/pub/fhs-2.3.html#MEDIAMOUNTPOINT
Jun
24
comment Memory usage per user in Linux?
smem (mentioned in my answer) solves the shared memory problem with its PSS and USS measurements (PSS proportionally distributes the shared memory between the processes which share it).
Jun
14
comment How to convert text file from Windows line breaks to Unix ones on Unix/Linux?
Be careful when using that if the file does not already have a line break at the last line; vim will add one unless you know how to tell it not to.
Jun
14
comment How do you get the Linux kernel boot command after boot?
Note that /proc/cmdline is much more reliable, since the dmesg buffer size is limited.
Nov
10
comment How can I run a server on Linux on port 80 as a normal user?
That is the same as running as root, unless the app knows how to drop priviledges.
Nov
10
comment How can I run a server on Linux on port 80 as a normal user?
@Sunny: upvotes are not for the fastest gun in the west, but for the best responses. Yours is the best so far (I only mentioned iptables; you actually provided the full command line). The only thing mine has yours doesn't is the caveat about other users also being able to bind to port 8080.