98
votes
3answers
139k views

ps aux output meaning

When typing ps aux, what does each column of the output mean? For example $ ps aux timothy 29217 0.0 0.0 11916 4560 pts/21 S+ 08:15 0:00 pine root 29505 0.0 0.0 38196 2728 ? ...
97
votes
13answers
28k views

What is the exact use of a MAC address?

I understand that IP addresses are hierarchical, so that routers throughout the internet know which direction to forward a packet. With MAC addresses, there is no hierarchy, and thus packet forwarding ...
97
votes
10answers
248k views

What can I do if I forgot my Windows password?

I got a brand new Windows 7 machine, installed the operating system, created one account and forgot its password. What can I do? There is no external CD, the operating system is loaded from somewhere ...
96
votes
20answers
116k views

Is there a built-in checksum utility on Windows 7?

Is there a built-in checksum/hash utility on Windows 7?
96
votes
14answers
214k views

How to move windows that open up offscreen?

I have a dual monitor setup, and I recently played around with the positioning settings, and some of my single window applications do the favour of preserving where they were last closed, and opening ...
96
votes
7answers
420k views

How do I change the default font of Sticky Notes?

How can the default font be changed for the Windows 7 Sticky Notes application? I can't stand that faux handwriting font it uses.
96
votes
4answers
56k views

Chrome: remove URL from autocomplete which doesn't show up in history?

I accidentally visited gist.gihub.com (note the missing t), and now that URL auto completes each time I start typing gist.…. How can I remove this URL? I've tried removing it from my history, but ...
96
votes
2answers
60k views

How do you run a SSH server on Mac OS X?

How do you run a ssh server on Mac OS X?
96
votes
8answers
219k views

A DownThemAll equivalent for Chrome [closed]

I'm looking for a Chrome extension / add-on that's like DownThemAll in functionality. Basically an add-on that will allow me to bulk download files with the same extension and/or pattern from a web ...
96
votes
11answers
126k views

How to sync bookmarks between Firefox, Chrome, and Safari on multiple computers?

There are some similar question on bookmark syncing, but most answers point to Delicious or Google bookmarks. However, as Chrome doesn't have the Google toolbar, how would those sync? I use several ...
95
votes
16answers
63k views

How to delete all files in a directory except some?

I need to delete all files in a directory, but exclude some of them. For example, in a directory with the files a b c ... z, I need to delete all except for u and p. Is there an easy way to do this?
95
votes
7answers
21k views

How can I create a file with a specific size from a command line?

How can I create a file (e.g. using the touch command or another similar way), but with a specific size (e.g. 14 MB)? The use case is to test FTP with various file sizes. If we can create a file with ...
95
votes
13answers
13k views

Why doesn't “add more cores” face the same physical limitations as “make the CPU faster”?

In 2014, I hear a lot of programming languages touted for their concurrency features. Concurrency is said to be crucial for performance gains. In making this statement, many people point back to a ...
95
votes
3answers
76k views

How to compact VirtualBox's VDI file size?

I've a VirtualBox VM which configured a very large hard disk size (bigger than host). By my mistake, a program on the VM generated lots of log files and the VDI file size keeps growing until there is ...
95
votes
1answer
141k views

What is port forwarding and what is it used for?

There are a lot of questions on 'port forwarding' but there doesn't seem to be one that clearly states what it is and what it's used for. So: What is Port Forwarding? What is it used for, and why ...
95
votes
8answers
56k views

Turn on the link hover statusbar in Google Chrome

I want to turn on the feature where whenever I hover over a hyperlink and in the bottom lefthand corner it shows a light blue hover tooltip about where that link goes. It looks like that since some ...
95
votes
1answer
14k views

I accidentally plugged my USB mouse into my eSata port… it works?

I'm on a Thinkpad T510 and I accidentally plugged my Razor USB mouse into the eSata port not realizing my error because it has been working fine this whole time. Does this seem a little odd?
95
votes
4answers
185k views

How do I install the Sun/Oracle Java SDK on Ubuntu?

Since 11.10 Ubuntu does not provide the sun-java-jdk, how do I install it?
95
votes
4answers
31k views

What is the difference between shell, console, and terminal?

I'm confused with the terminology. What is the difference between shell, console, and terminal?
94
votes
9answers
8k views

Why is dial up so slow?

On a dial-up Internet connection, why is the speed is limited to 56 kbits/s compared to a broadband Internet connection which may carry 10 times as much as dial up through that same telephone line? ...
94
votes
13answers
9k views

Must TCP use IP?

Is it true that TCP is short for TCP/IP and they mean the same thing? Is it possible for TCP to be built on top of another protocol besides IP?
94
votes
9answers
9k views

What is the rationale behind safely removing USB media from windows PCs? [duplicate]

Quite often when I'm in a rush, I automatically pull out a USB pendrive or USB cable from an external hard drive from my desktop PC or laptop, without right-clicking on the safely remove icon in the ...
94
votes
8answers
41k views

Running upstart jobs as unprivileged users

What's the canonical way to have an upstart job change its userid and run the script as an unprivileged user? Obviously one can use su or sudo, but this seems hacky (and can generate needless log ...
94
votes
8answers
84k views

View files in ZIP archive on Linux

How can I view the files in a ZIP archive without decompressing it?
94
votes
7answers
74k views

How to make SUBST mapping persistent across reboots?

Does Windows (XP or later) have a built-in way to create persitent drive mappings, like the ones SUBST creates? I found a 3rd party tool psubst. Is there a way to do it without 3rd party tools?
94
votes
3answers
57k views

What Tiling Window Manager for Windows do you recommend? [closed]

What is the best tiling window manager for Windows? I'm looking for something like awesome. It would be nice if it removes the title bar and has "comfortable" shortcut keys (for me that's vi keys, ...
93
votes
12answers
63k views

How to get information about an image (picture) from the Linux command-line?

Am working on a web-app, and currently am migrating some stuff from an old app, but I hate that I have to open an image editor to get some info about images I am migrating. Things like image ...
93
votes
6answers
238k views

How can I give write-access of a folder to all users in linux?

I installed apache2 on Ubuntu just now, and noticed that the /var/www folder is protected. I can just sudo everything but I would rather just give it write access. How can I do this? I tried sudo ...
93
votes
7answers
32k views

How do I get rid of all caps ribbon titles in Office 2013?

Installed Office 2013 on Windows 8 today. It's great, except for one thing, the all caps ribbon titles are inconsistent with the title case titles everywhere else in Windows 8. Is there a registry ...
93
votes
10answers
265k views

How can I read my hard drive's SMART status in Windows 7?

How can I read the S.M.A.R.T. state of my HDDs while using Windows 7, either automatically or manually?
93
votes
5answers
55k views

Which linux filesystem works best with SSD

From wiki: The vital TRIM function is supported by the Linux OS starting with 2.6.33 kernel (available early 2010). However, support amongst various filesystems is still inconsistent or not ...
93
votes
5answers
35k views

Is it possible to use the IE10 App without making Internet Explorer the default browser?

Windows 8 comes with two versions of Internet Explorer: the normal desktop version, which looks just like IE9, and the Modern UI version, which is a full-screen tablet-style app. By default, links ...
92
votes
5answers
20k views

Why is serial data transmission faster than parallel?

Intuitively, you would think that parallel data transmission should be faster than serial data transmission; in parallel you are transferring many bits at the same time, whereas in serial you are ...
92
votes
9answers
21k views

Can a 7 days full 100% CPU load “burn-in” / “stress test” damage a modern notebook? [duplicate]

When I buy new computers, I usually do a "burn-in" with 100% CPU load for, say, seven days, in a well ventilated place. This is to find out if the computer has problems before I invest time into ...
92
votes
6answers
90k views

How to install rmagick on Ubuntu 10.04?

Here's what I've done so far: sudo apt-get install imagemagick libmagickcore-dev This did not throw any errors, so I think that ImageMagick is installed fine. Then I tried installing the gem: sudo ...
92
votes
8answers
891k views

How can I check the temperature of my CPU in Windows?

Does Windows provide a means to check my CPU temperature natively? If not, are there any software tools which can reveal this information?
92
votes
8answers
26k views

Is there a convenient way to edit PATH in Windows 7?

I do not understand why Windows 7 is still adopting this stuffy dialog box? I feel uncomfortable when editing and looking-up a path in this narrow text box. Is there a convenient way to edit PATH ...
92
votes
4answers
35k views

Why should I use Vagrant instead of just Virtualbox?

I've been using Virtualbox for many years to create a development environment. A lot of my colleagues are talking about Vagrant and many people seem very excited about it but I just can't seem to ...
92
votes
6answers
57k views

How can I use encryption with Gmail?

I'm currently reading Cory Doctorow's novel Little Brother which includes a part about encrypted messaging, and even wrapping messages first in my private key and then your public key. I'd like to ...
91
votes
10answers
94k views

Too many authentication failures for *username*

I have a hostgator account with ssh access enabled and when trying to upload the generated .pub key file with this command: rsync -av -e "ssh -p2222" /home/user/.ssh/key.pub ...
91
votes
12answers
102k views

Where is SVN on OS X Mountain Lion?

I upgraded to OS X Mountain Lion and found out SVN is no longer present. I use Netbeans 6.9.1 in conjunction with Apache's SVN. How can I get it back and working?
91
votes
9answers
187k views

Command prompt (Windows 7) grep equivalent?

Is there a command prompt (Windows 7) grep equivalent? That is, I want to filter out the results of a command: Bash use: ls | grep root What would it be from a Windows command prompt?
91
votes
2answers
7k views

Is there a standard name for the “standard” computer screw?

I have the unfortunate task of writing a technical document, and I know the government is a stickler for unnecessary detail. Is there standard name for the standard computer screw? Also, what is the ...
91
votes
12answers
61k views

Mass deleting files in Windows

I have a directory, that contains ~ 3 million files in certain subdirectories on a Windows 2008 server. Manually deleting the files via SHIFT+DEL on the root dir takes ages. Is there any other way to ...
91
votes
1answer
42k views

How do I get Notepad++ to associate a file type with a language? [duplicate]

I have associated .wxs files with Notepad++. So far so good. However, it doesn't remember that it should use XML syntax highlighting. How do I associate a file-type with a Language?
91
votes
8answers
171k views

How do I view and edit Cookies in Google Chrome?

I wish to view and edit the cookies of my google chrome. Can anyone suggest to me a way to do it?
91
votes
4answers
86k views

VirtualBox shared clipboard?

Where is the configuration option for sharing clipboards (copy & paste) between the host OS and the guest OS?
91
votes
7answers
35k views

How do I disable the profiles button in Chrome?

Since Chrome version 38, there's a pretty ugly button in the title bar of the Chrome window that allows you to switch profiles quickly. Since I'm the only one that uses my computer, this is not ...
91
votes
1answer
11k views

Windows 7 and Vista Activation FAQ: How do language, version, 64-bit or 32-bit, and source affect ability to install and transfer Windows licenses?

We get a lot of questions on Super User about Windows activation and licensing. This question is an attempt to answer the most common questions in one place with a canonical answer. When ...
90
votes
9answers
134k views

How to delete a file in Windows with a too long filename? [duplicate]

Possible Duplicate: Tool for deleting directories with path/names too long for normal delete (How to delete a file with a path too long to be deleted) ...

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