88
votes
5answers
31k views

Restore tmux session after reboot

Is there any way to save a tmux session? In other words, if I reboot the computer, will I always lose the sessions?
88
votes
6answers
52k 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 ...
87
votes
13answers
5k views

Computer refresh - Are our IT consultants being honest with us? [closed]

I work as the "IT guy" for our business (60 users) by default as we generally outsourced IT previously, and I have a good handle on basic networking, security, support, etc. I've been given the task ...
87
votes
9answers
42k views

How can I search the bash history and rerun a command?

Can I search history in bash and run the result?
87
votes
5answers
154k views

How to recursively delete directory from command line in windows?

Is there a windows equivalent of sudo rm -r [directory-name]?
86
votes
14answers
184k 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 ...
86
votes
7answers
35k views

Upgrading and installing packages through the Cygwin command line?

I'm a blind computer user that uses Cygwin. The installation program isn't very accessible: upgrading, installing, and removing specific packages is quite hard to do since you have to use simulated ...
86
votes
4answers
42k views

Clear cache for specific domain name in chrome

I want to clear the cache for a specific domain name in Chrome. Is there an extension or other method that I can use to do this?
86
votes
7answers
29k 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 ...
86
votes
7answers
50k 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 ...
86
votes
4answers
26k 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?
86
votes
1answer
10k 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 ...
85
votes
16answers
51k 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?
85
votes
12answers
51k views

How to get information about an image(picture) from linux commandline?

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 am migrating. Things like image dimensions. ...
85
votes
3answers
31k views

Rename screen session

Is it possible to change the name of a GNU screen session? Say I called started it with "screen -S foo" and I want to rename it to bar.
85
votes
8answers
36k 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 ...
85
votes
8answers
73k views

Download all mail messages from Gmail including Sent folder items

How can I download all the messages from a Gmail account, including the Sent folder items, when a normal POP fetch will only grab the inbox items? My wife recently died, and she gave me access to her ...
85
votes
7answers
6k views

Does a computer use fewer resources when programs are minimized?

When programs are minimized in Windows 7, do they use less memory and CPU than leaving them maximized?
84
votes
3answers
5k views

How does the computer know that the PC was not properly shut down?

Actually, this question struck me because of power cuts in my house. When there is a power cut, there is a sudden loss of power from the computer. How does the computer know that the shutdown was ...
84
votes
9answers
7k views

Downloading software without bloatware

From time to time, I find myself needing a piece of software to perform a specific task. Download.com (CNET) used to be a good site. But now, I find that they bundle a lot of "evilware", i.e. ...
84
votes
14answers
240k views

“Show desktop” keyboard shortcut in Mac OS X

I am using a MacBook Pro with Mac OS X 10.5. Is there a similar function to "show desktop" (shortcut is WindowsD) on a Mac?  It should hide all applications and show a clean desktop.
84
votes
6answers
11k views

Tired of waiting for www.google-analytics.com — can a browser setting “opt me out”?

Recently (past few weeks) my web browsing is often very slow, and it is often the case at these times that the status bar reads "waiting for www.google-analytics.com". Is there any browser setting ...
84
votes
6answers
66k 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?
84
votes
4answers
49k 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 ...
84
votes
9answers
244k 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?
84
votes
2answers
55k views

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

How do you run a ssh server on Mac OS X?
83
votes
3answers
6k views

How are commercial DVD's burned? [closed]

I'm not talking about the DVD-R's here. When you buy retail software and DVD movies from the store for example, how is that DVD burned onto the original disc? What would I need if I want to burn those ...
83
votes
4answers
170k views

How to decompress a .bz2 file

I have a file as: filename.bz2, but I can't figure out how to decompress it. I tried several methods, none of them seems work. I have tried the command: tar xvjf filename.tar.bz2, but it didn't work ...
83
votes
7answers
11k views

Can I use vodka to clean my keyboard?

I spilled beer on my keyboard a while back, and some of the keys are sticky. It's driving me crazy, and I don't have any isopropyl. Can I use vodka to clean it?
83
votes
4answers
11k views

Why can't you uninstall multiple programs at once in Windows?

Why won't Windows allow you to uninstall or remove multiple programs at once? What is the reasoning behind this? Will it mess up an internal system? I am not looking for how to uninstall multiple ...
83
votes
2answers
122k 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 ? ...
83
votes
1answer
5k views

Strange dotless decimal notation of IP address… How does it work?

Earlier today I thought I had a URL in my clipboard, but I actually had four 9 digit integers copied from a spreadsheet, which were identification numbers from a proprietary system. Completely ...
82
votes
7answers
5k views

Why do some RJ45 plugs have the lock release clip under a rubber cover?

Some RJ45 plugs have an exposed lock release clip, like this: However, others place the release clip under a rubber cover, like this: I find that the rubber cover is almost never anything but a ...
82
votes
10answers
205k views

How do I get an entire directory in sftp?

I'm just learning to use sftp, and I want to copy a directory from the remote computer to my local computer. If I try get [directory] it gives me this error: Cannot download non-regular file: ...
82
votes
6answers
211k 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 ...
82
votes
1answer
117k 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 ...
82
votes
5answers
103k views

Windows 8 Hyper-V - how to give VM internet access?

I've got Windows 8 Pro on my home machine. I want to have a Windows 7 Professional VM running under Hyper-V, and I want the VM to have full internet access. My physical machine has a wireless network ...
82
votes
4answers
77k views

VirtualBox shared clipboard?

Where is the configuration option for sharing clipboards (copy & paste) between the host OS and the guest OS?
81
votes
8answers
22k views

My colleague often shuts down my machine through the LAN - how do I prevent it?

This might sound weird. My colleague and I were working on a Windows machine. He frequently shuts it down through the LAN. He usually follows these steps: Access command prompt, enter shutdown -i. ...
81
votes
4answers
67k views

Can a 32-bit OS machine use up all 8GB RAM + 20GB page file?

What I understand about 32-bit OS is, the address is expressed in 32 bits, so at most the OS could use 232 = 4G memory space -- I assume the unit is bytes, so 4GB. Does this mean if any machine with ...
81
votes
9answers
22k views

How can I wipe a broken hard disk drive before sending it back to the manufacturer for maintenance?

The hard drive of my laptop died, the manufacturer wants me to send it so that they can investigate, but I'm concerned that the drive might contain sensitive information. When I say the drive is ...
81
votes
2answers
6k views

How do web-servers “listen” to IP addresses, interrupt or polling?

I'm trying to understand the lower details of web servers. I am wondering if a server, say Apache, is continuously polling for new requests or If it works by some sort of interrupt system. If it is an ...
81
votes
14answers
189k views

How do I figure out which /dev is a USB flash drive?

I want to mount a USB drive, two of them and I need two different mount points. Unfortunately, the Linux kernel underwent a name change and I can't figure out which /dev location is the right one. Is ...
81
votes
3answers
21k views

less command with multiple files: How to navigate to next/previous

I just found out I can use less with multiple files. less status line tells me (END) - Next: file2.txt But how do I navigate previous/next from less?
81
votes
7answers
19k views

File extension for Markdown files?

Is there an official file extension for standalone Markdown files?
80
votes
7answers
12k views

Is CRT degaussing really dangerous for nearby laptops?

I have an old CRT connected to laptop as a secondary display. As you know, when CRT turns on it degausses itself; remember that sound when you turn it on, or force degaussing through menu. CRTs ...
80
votes
15answers
47k views

Can AVI files contain a virus?

I'm downloading an AVI file via a torrent, but my anti-virus detects something. Is it possible that the AVI file contains a virus? It is quite weird since the torrent has many positive reviews.
80
votes
13answers
352k views

How can I find out what motherboard is in my computer?

I want to find out the exact model of my computer's motherboard so that I can see what sort of memory chip, graphics cards and other components it supports. I'm using Windows 7 Ultimate 64-bit.
80
votes
5answers
142k views

How to uninstall Homebrew? (Mac OS X Package Manager)

I’ve got some problems with the package manager, Homebrew. I can’t find how to remove it! Is it safe to remove whole /usr/local? Homebrew was installed somewhere in that directory.
80
votes
5answers
25k views

How can I find out where an email really came from?

How can I know where an email really originated from? Is there any way to find it out? I have heard about email headers, but I don't know where can I see email headers, in Gmail, for instance. Any ...

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