All Questions
504,879
questions
506
votes
9
answers
57k
views
Did I just get hacked?
I am developing a consumer product, and it is supposed to be connected to the Internet, so as expected, it is connected to the Internet so that I can properly develop it.
I went away for an hour or ...
501
votes
15
answers
2.4m
views
How to enable execution of PowerShell scripts?
When I try to execute my PowerShell script I get this error:
File C:\Common\Scripts\hello.ps1 cannot be loaded because the execution of scripts is disabled on this system. Please see "get-help ...
500
votes
30
answers
450k
views
How to check if a binary is 32 or 64 bit on Windows?
Is there an easy way to check if a binary is 32 or 64 bit on Windows? I need to check before I move the program to a 32bit machine and experience a spectacular failure.
493
votes
18
answers
709k
views
How to clear the contents of a file from the command line?
I have a log file that has a bunch of stuff in it that I don't need anymore. I want to clear the contents.
I know how to print the contents to the screen:
cat file.log
I know how to edit the file, ...
490
votes
20
answers
385k
views
How can I make Chrome stop caching redirects?
I am working on a web application that is using redirects (for pretty URLs).
I am trying to debug logic in the way the redirects are working. However Google Chrome keeps remembering the redirects and ...
486
votes
7
answers
254k
views
What is the difference between executing a Bash script vs sourcing it?
What is the difference between executing a Bash script like A and sourcing a Bash script like B?
A
> ./myscript
B
> source myscript
484
votes
5
answers
486k
views
How to open files in vertically/horizontal split windows in Vim from the command line
There must be a way, something like this:
vim -[option] <file-list>
to open files from command prompt and not from within Vim.
split windows vertically or/and horizontally
in separate tabs
484
votes
11
answers
1.2m
views
What is the home directory on Windows Subsystem for Linux?
When I start bash on Windows Subsystem for Linux, it drops me in the directory
/mnt/c/Users/<username>
When I ls this directory, I see the directories Desktop, Documents, etc. that I can see ...
483
votes
16
answers
1.1m
views
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,...
480
votes
6
answers
790k
views
How do I exit telnet?
I start telnet by telnet host port. How do I stop it in Windows? Shockingly, Ctrl+C doesn't work.
477
votes
21
answers
1.7m
views
How to download files from command line in Windows like wget or curl
How can I download something from the web directly without Internet Explorer or Firefox opening Acrobat Reader/Quicktime/MS Word/whatever?
I'm using Windows, so a Windows version of Wget would ...
477
votes
14
answers
88k
views
Does e-mail address obfuscation actually work? [closed]
Most of the time when I see someone post their email address online, especially if it's a personal address, they use something like
me [at] example [dot] com
instead of the actual email address (me@...
474
votes
18
answers
465k
views
An SSH tunnel via multiple hops
Tunneling data over SSH is pretty straight-forward:
ssh -D9999 [email protected]
sets up port 9999 on your localhost as a tunnel to example.com, but I have a more specific need:
I am working ...
474
votes
2
answers
268k
views
How do I rename a session in tmux?
When I first started using tmux, I didn't give my first session a name. Then, as I started creating different sessions for different tasks (work, play, etc), I started naming my sessions.
Now I have ...
474
votes
9
answers
1.0m
views
How can I free up drive space from the Windows installer folder without killing Windows?
On my SSD machine, the C:\Windows\Installer folder is massive and takes up about 15% of my total disk space.
Is there a way to clean up that folder without killing Windows 8.1/10? Tucking away the ...
471
votes
18
answers
844k
views
How do I compare binary files in Linux?
I need to compare two binary files and get the output in the form
<fileoffset-hex> <file1-byte-hex> <file2-byte-hex>
for every different byte. So if file1.bin is
00 90 00 11
in ...
468
votes
18
answers
327k
views
How can I remove malicious spyware, malware, adware, viruses, trojans or rootkits from my PC?
What should I do if my Windows computer seems to be infected with a virus or malware?
What are the symptoms of an infection?
What should I do after noticing an infection?
What can I do to get rid of ...
466
votes
4
answers
159k
views
What is randomart produced by ssh-keygen?
When you generate a key, you get "randomart" from newer versions of OpenSSH. I am unable to find an explanation of why, and what I'm supposed to use it for.
Generating public/private rsa key pair.
...
462
votes
14
answers
378k
views
Mac OS X equivalent of the Ubuntu "tree" command
Is there an equivalent to the Ubuntu tree command for Mac OS X?
462
votes
1
answer
512k
views
How to remove one or all auto-complete text entries in Chrome? [duplicate]
Ok... so this is embarrassing.
I typed in "boobs" on EncyclopediaDramatica's search because, well, it's a really funny page.
But now I've got a problem... EVERY TIME I click a search field in Chrome ...
461
votes
18
answers
835k
views
Windows SSH: Permissions for 'private-key' are too open
I've OpenSSH 7.6 installed in Windows 7 for testing purposes. SSH client & server work just fine till I tried to access one of my AWS EC2 box from this windows.
It seems like I need to change the ...
460
votes
16
answers
1.2m
views
How can I download an entire website?
How can I download all pages from a website?
Any platform is fine.
454
votes
11
answers
545k
views
How do I add text to the beginning of a file in Bash?
Hi I want to prepend text to a file. For example I want to add tasks to the beginning of a todo.txt file. I am aware of echo 'task goes here' >> todo.txt but that adds the line to the end of ...
450
votes
11
answers
1.8m
views
How to rename the User folder in Windows 10?
After installing Windows 10 on my Surface Pro 3 it took my user name 'Jeremy' and created a user folder named C:\Users\jerem.
I want to rename the folder C:\Users\Jeremy. The procedure for Windows 8 ...
449
votes
8
answers
77k
views
Why don't websites immediately display their text these days?
I've noticed that recently many websites are slow to display their text. Usually, the background, images and so on are going to be loaded, but no text. After some time the text starts appearing here ...
448
votes
6
answers
589k
views
How can I resume a stopped job in Linux?
How can I resume a stopped job in Linux? I was using emacs and accidentally hit ctrl-z which blasted me back to the console. I can see it when I type 'jobs'
[*****]$ jobs
[1]+ Stopped ...
441
votes
18
answers
180k
views
How to prevent Gnome-shell's Alt+Tab from grouping windows from similar apps?
I love pretty much everything about how Gnome Shell handles app-switching through Alt+Tab. My one gripe with it, though, is how it forces the user to use Alt+` (or Alt+ whatever key above the Tab key ...
438
votes
7
answers
1.3m
views
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 181.169.1.2 -p 5566
After the connection is established and I write the message and send it I can’...
436
votes
9
answers
950k
views
How to save a remote server SSL certificate locally as a file
I need to download an SSL certificate of a remote server (not HTTPS, but the SSL handshake should be the same as Google Chrome / IE / wget and curl all give certificate check fail errors) and add the ...
434
votes
18
answers
1.0m
views
Is there a way to "auto login" in PuTTY with a password?
Is there a way to configure a password for a stored session in PuTTY?
I know there is the capability to specify an "auto-login username" (under Connection/Data), but is there a way to do the same ...
433
votes
8
answers
650k
views
How to merge audio and video file in ffmpeg
I want to merge an audio file (.wav or .au format) with a video file (.mp4 format).
Please suggest me how to achieve this. I want to merge these file to new .mp4 video file. An ffmpeg command would ...
432
votes
25
answers
543k
views
How to delete directories with path/names too long for normal delete
Windows seems to have a length limit on file names when trying to delete, though it won't prevent those files from being created.
Our build process creates a number of temporary files (many build off ...
426
votes
20
answers
671k
views
How to encode base64 via command line?
Is there a terminal command in Mac OS X which will base64 encode a file or stdin?
426
votes
9
answers
869k
views
How to get the summarized sizes of directories and their subdirectories?
Let's say I want to get the size of each directory of a Linux file system. When I use ls -la I don't really get the summarized size of the folders.
If I use df I get the size of each mounted file ...
425
votes
11
answers
339k
views
Selecting columns in Visual Studio Code
Does Visual Studio Code support selecting columns of text?
I have not yet found this feature, so I am wondering if it is hidden somewhere. I am familiar with holding down Alt while selecting text, but ...
425
votes
11
answers
820k
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?
420
votes
13
answers
509k
views
How can I delete a symbolic link in Windows?
I created a symlink using mklink. Now I need to change it but I can't figure out how to delete it so I can recreate it correctly.
414
votes
9
answers
711k
views
Rebooting Ubuntu on Windows without rebooting Windows?
Is it possible to reboot the Ubuntu sub-system without restarting my system?
I tried to use the shutdown command after installing some updates, but that doesn't seem to be an option here.
The ...
411
votes
11
answers
537k
views
How to check which apache modules are enabled/installed?
Which is the most elegant way to check which apache modules are enabled?
411
votes
4
answers
377k
views
How to remove an entry from Chrome's Remembered URLs from the url bar?
I've got a URL in Chrome "local.mysite.com" that autopopulates when I start typing "local.my" into the URL bar.
Note that this URL DOES NOT EXIST in my browser history (at chrome://history/#e=1&p=...
410
votes
5
answers
1.1m
views
What are PATH and other environment variables, and how can I set or use them?
Questions about
setting environment variables
the PATH
are very common here, and in most cases the answers are very similar to each other. In the future it would be nice to have a good Q/A for this....
408
votes
6
answers
264k
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?
404
votes
25
answers
260k
views
Switching back to last *used* tab on Chrome
How do I toggle back to the last tab used in Chrome on Mac? Ctrl-Tab and Ctrl-Shift-Tab navigates the tabs in order. But I want to switch back and forth between two tabs similar to how how Cmd-Tab ...
400
votes
3
answers
964k
views
What is the Windows equivalent of the Unix command cat?
I want to do exactly what unix "cat" does, but on my PC. Is there a simple equivalent command for the Windows command line?
Specifically I want to create a file from all the files of a given type in ...
399
votes
10
answers
437k
views
In Mac OS, what is the keyboard shortcut to switch between windows of the same application?
I often use the Cmd+Tab shortcut to switch between different applications (for example: Xcode and Google Chrome), but is there a shortcut to switch between different windows of the same application (...
398
votes
15
answers
243k
views
Why are we still using CPUs instead of GPUs?
It seems to me that these days lots of calculations are done on the GPU. Obviously graphics are done there, but using CUDA and the like, AI, hashing algorithms (think bitcoins) and others are also ...
397
votes
7
answers
277k
views
Find what package a file belongs to in Ubuntu/Debian?
I frequently find myself missing a program, man page, or other file when working on my Ubuntu 8.04 system. Is there any simple way to look up what package contains a given file (whether it is ...
396
votes
7
answers
1.0m
views
How can I make chown work recursively?
I've got a directory called pdfs that contains a bunch of sub- and sub-sub-directories. I want to change ownership on all PDF files in all of the subfolders. I just tried this:
chown -R someuser:...
396
votes
14
answers
552k
views
How to disable the "Get Windows 10" icon shown in the notification area (tray)?
This icon showed up in my taskbar notification area today and I cannot seem to get rid of it:
Clicking on it displays the following screen:
So how do I disable or remove the "Get Windows 10&...
395
votes
21
answers
544k
views
How do I detach a process from Terminal, entirely?
I use Tilda (drop-down terminal) on Ubuntu as my "command central" - pretty much the way others might use GNOME Do, Quicksilver or Launchy.
However, I'm struggling with how to completely detach a ...