Super User Community Digest

Top new questions this week:

How many physical CPUs does my machine have?

I am a bit confused about the number of CPUs my server has. It is running on Intel(R) Xeon(R) Gold 6242R CPU @ 3.10GHz which according to official Intel docs contains 20 physical cores. The problem ...

cpu core  
asked by eddyP23 29 votes
answered by mtak 57 votes

3.5" Hard Drives with 'bumps' on the side. Is this normal?

Not sure if this is the right place to ask, but here goes .. I recently bought 2x WD Red Plus 8TB NAS hard drives, and while unboxing them I noticed that they have bumps on their sides, of varying ...

asked by Ahmad 27 votes
answered by Ro-ee 40 votes

Extreme drops in hard disk performance

Basic hardware information: The hard drive in question is a Seagate BarraCuda 4TB (model number: ST4000DM004). For more details, see the output of hdparm -I among the appendices at the end. ...

hard-drive performance hardware-failure  
asked by Taederias 16 votes
answered by Eugen Rieck 36 votes

Why are there ping replies from within

Today I accidentally discovered, that I can ping addresses in the subnet and get an ICMP reply. I tried a few random ones, it always got replies. After checking the routing table and a ...

networking ip standards  
asked by milgner 16 votes
answered by mtak 24 votes

Unexplainably Large (empty) Excel File

I have an Excel file that is ~30MB and it contains nothing but a blank sheet. It has no data, tables, pictures or formatting - it is simply a blank sheet. I'd like to understand why this has happened ...

asked by Ollie 8 votes
answered by Saaransh Garg 22 votes

Does DBAN Make a Drive Un-reusable?

I heard that a disk is reusable just after being wiped with DBAN. Just to make sure, is this true? Will I be able to use it again just as easily if I ran the autonuke command on it? I don't care about ...

hard-drive dban  
asked by G-Power 6 votes
answered by Mokubai 21 votes

Setting up a new mac to avoid "system" folders like Documents, Music, Desktop, etc

As a computational scientist, I spend a lot of time working on my macbook pro at the command line. I'm setting up a new laptop and it's time to rethink some of my setup. It's always bothered me that ...

macos zsh user-profiles home-directory  
asked by glwhart 3 votes
answered by Hogstrom 1 vote

Greatest hits from previous weeks:

How can I "turn on wireless capability" in Windows 7?

On my laptop I have a strange bug or something that fairly frequently causes wireless networking to become spontaneously disabled. Network connections drop out & all available APs disappear. ...

windows-7 wireless-networking troubleshooting shortcuts  
asked by Mark McDonald 17 votes
answered by Sam 22 votes

Can I completely disable Cortana on Windows 10?

Windows 10 has Cortana, which I don't like. I disabled it as soon as I could. However, looking in Task Manager, the process for Cortana is still running, and can't be effectively terminated: ending ...

windows-10 cortana  
asked by ArtOfCode 312 votes
answered by DrMoishe Pippik 29 votes

Test if a port on a remote system is reachable (without telnet)

In the old days, we used telnet to see if a port on a remote host was open: telnet hostname port would attempt to connect to any port on any host and give you access to the raw TCP stream. These days,...

linux networking port  
asked by Steve HHH 440 votes
answered by lornix 358 votes

How do I exit an SSH connection?

I’m connecting to a server via SSH to send a message to a socket server using a command like: ssh -p 5566 After the connection is established and I write the message and send it I can’...

linux ssh virtualbox  
asked by Andreea 364 votes
answered by Aaron Hall 333 votes

How can I download an entire website?

How can I download all pages from a website? Any platform is fine.

download website web  
asked by joe 411 votes
answered by Axxmasterr 381 votes

Path to current desktop backgrounds in Windows 10?

There is another question on here that allows users to find the path to their current background image through a cmd command. How could I find out the path to the current desktop image? In Windows ...

asked by cujo 125 votes
answered by xypha 194 votes

How can I "group by" and sum a column in excel?

I'm trying to figure out how to "group by" values in an Excel spreadsheet. Given the following example (this is an inventory sheet I use at my restaurant:) At the far right of the spreadsheet there ...

asked by Ian P 189 votes
answered by Scott Obert 99 votes

Can you answer these questions?

Modem redirecting HTTP sites to itself (

I have a Huawei E8372h-608 WiFi modem. I'm having a strange problem where whenever I try to access a site via HTTP I am redirected to the modem at I can load sites via HTTPS just fine but ...

networking wireless-networking router modem  
asked by Muon 1 vote

How to set full-pixel anti-aliasing in Firefox?

Is it possible to change the web pages font rendering method in Firefox on Windows to something other than sub-pixel? I want normal full-pixel antialiasing instead of sub-pixel, but I can't find an ...

windows firefox fonts rendering anti-aliasing  
asked by Mikhail V 1 vote

A process inside "System" causes periodic slowdown

I've read some other pages but most of them describe the process taking massive amounts of CPU constantly. I've encountered this on pretty much every computer that has been with me for a long time, so ...

windows-10 performance nvidia-graphics-card cpu-usage  
asked by Midaga 1 vote
answered by Oast 0 votes
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