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Feb
6
comment Why does plugging my ethernet cable into my PC crash the rest of my internet?
It matters because of the twists. The twisted pairs in the cables are there to eliminate noise. So on a given pair send signal one will be a negative, and a positive with respect to ground. By having them be opposite with respect to the ground the electronics can detect and handle some errors caused by EMF interference. See: en.wikipedia.org/wiki/Differential_signaling Each pair is a set, each of the four pairs, have a different twist frequency (twists per inch).
Feb
6
answered How can I inform Mac OS and iOS clients of VPN routes?
Feb
3
comment Find a student with select grades
@BigChris I would use a structure like this. i.stack.imgur.com/V1Cqh.png You want to do this because a student name might change in the future, or you might have multiple students with the same name. You don't want to have to mass-update your scores table when a student name changes, you just want to update the Student table. Likewise, the value of your Subjects might change, or you might add more. You want to be able to change those without mass updating the scores table.
Feb
3
answered Find a student with select grades
Feb
3
comment Find a student with select grades
Your database schema is poorly designed. With a properly normalized schema this could be very easy.
Jan
27
comment Script to check for files newer than argument, help using -nt
Add a set -x to the top of your script? The output should give you a pretty strong idea about what the problem is.
Jan
24
awarded  Guru
Jan
20
comment User vs. System Environment Variables: Do System Variables Override User Variables?
When you change variables you often have to completely restart Windows. Changing a variable in the settings will not change running processes. New processes copy the environment from running processes (depending on how they are started), so simply starting a process doesn't mean you get a new environment.
Jan
9
awarded  Famous Question
Jan
8
comment How to recover a pairing bluetooth pin code?
It somewhat depends on the specific bluetooth device. A google search for 'remove bluetooth device windows 7' has several potentially useful articles.
Jan
8
comment Why can't I view the arp table on my VPS server?
Some VPS and virtualization technologies do some weird networking voodoo as you suggested. I am curious why you would care about the arp table on a VPS.
Jan
8
comment [root@localhost /]# touch 1 touch: cannot touch ‘1’: No space left on device
Honestly I think you need to acquire a livecd meant for repair your system (e.g. sysresccd.org) and then boot off that and attempt your scanning.
Jan
8
comment How to recover a pairing bluetooth pin code?
Remove the pairing on the PC also, then you should be able to do the setup as if it was brand new.
Jan
8
comment [root@localhost /]# touch 1 touch: cannot touch ‘1’: No space left on device
Use fsck /dev/mapper/centos-root not fsck / to check the root filesystem.
Jan
5
revised Implications of using 192.168.1.255 for second access point
added 98 characters in body
Jan
5
answered Implications of using 192.168.1.255 for second access point
Jan
5
comment Implications of using 192.168.1.255 for second access point
because it is the default broadcast address on a network - Completely depends on your subnet mask. If you happened to have a /22 mask it would be a perfectly valid address.
Jan
5
comment tripwire should ignore /etc when /etc/ntp.drift is the only change
I suggest that you simply modify your configs so ntp.drift gets stored under /var instead of /etc.
Dec
23
reviewed Leave Open Is it possible to connect 2 separate VPNs?
Dec
23
reviewed Close custom outlook reminder addin or VBA