All Issues
24,993 verified issues
How to TRIM/DISCARD a whole SSD partition on Linux?
My partition on an SSD drive doesn't contain any filesystem, but it contains garbage. How do I do a TRIM/DISCARD operation on the whole partition?
How to mount and unmount hard drives under Windows (the unix way)
On my work computer I have two USB hard drives that I use rarely. They have a power save mode that sends them into sleep after a couple of minutes of them being idle. Whenever I open a context menu on a file, the drives are woken up (most likely caused by the "send to" handler). So I eject the driv…
Store the output of date and watch command to a file
I am a newbie to linux and I am trying to watch a command and try to log it into a file. I tried watch -t -n 10 "(date '+TIME:%H:%M:%S' ; ps aux | grep "pattern" | wc -l)" >> logfile and am expecting a result like to be stored in logfile. However, when the logfile has unprintable characters in in. …
Which command in the Linux/UNIX sh shell returns my current directory?
Using the shell (not ), which command in Linux/UNIX prints out my current directory?
What is the difference between a kibibyte, a kilobit, and a kilobyte?
This question got me wondering about the differences between these three ways of measuring size: a kibibyte, a kilobit, and the conventional kilobyte. I understand that these measurements have different uses (data transfer rate is measured in bits/sec), but I'm not quite sure if I can tell the diff…
What if the hard disk is partitioned into more than 26 sections in Windows?
As we know, in Windows the partition location is prefixed with . What happens if there are more than 26 partitions?
How to make ^ and ` non-dead-keys on Windows 7 with German keyboard layout
In the default German keyboard layout and backtick/forwardtick are deadkeys. However, as a programmer I usually do not need to write áccênts, but the characters itself. Being required to press the key twice and backspace or the key and space is pretty annoying in this case. So I'd like to know if (…
List of Hidden / Virtual Windows User Accounts
I’m trying to find a way to get a comprehensive list of user accounts on a Windows 7 system, including hidden ones. The User Accounts dialog ( ) only shows the normal user accounts, and even the Local User and Groups editor only shows normal user accounts and standard hidden/disabled ones like Admi…
How do I decrypt a password-protected PDF on OSX?
I have a PDF that requires a password to view. I know what the password is. I frequently open this PDF to print it, and find entering the password each time incredibly annoying. How can I remove the password from the PDF? Since I need to print it, simply taking a screenshot isn't a good solution. I…
What is "virtualapp/didlogical"?
I was rooting around in my credential manager and found a credential for "virtualapp/didlogical". I didn't put it there, I don't recognize it and I am finding conflicting info about it. It may be a keylogger, or used by Windows Live or Google Talk or any of a number of other programs, depending on …
How can I install objdump on Mac OS X?
I want to get the source code of a small command line tool using objdump on Mac OS X. I've used arm-linux-objdump on Linux and find it a great tool. Is there any way to install objdump on OS X? I've searched Google and found information about arm-apple-dawin9-objdump, but failed to find anything to…
Have Windows "Run" dialog run as Admin?
Windows has this nifty little shortcut for running commands. Press Windows+r. Problem is, is there an easy way to have the commands I run in that dialog to prompt for a UAC credentials dialog and get consent from a admin user. Right now, I'm trying to run this command in the Run dialog It works whe…
Users don't appear in /etc/passwd on Mac OS X
By examining the file, I should get a list of all users in the system. However, when dumping the file on Mac OS X I don't see my current username but many entries like these: How come I can log into the shell with my username and see that username when I do ?
How to adjust monitor's backlight brightness in Windows
My monitor is more than an arm's length away from me, so adjusting its backlight brightness is quite inconvenient. Is there a way in Windows to adjust the backlight using the keyboard and/or mouse only. If so, how?
How can I list only non-empty files using ls?
How can I list (using ) all files that are not empty (size > 0) using linux?
Add to a 7-Zip archive: How to exclude certain file types/extensions?
I want to archive a folder, but I want to exlude all media files. How do I leave out *.avi and *.flac when archiving?
Where should I put my script?
Say I have created a bash script, which will make an ftp user, mount some paths for that user, etc. Where in the file system it would be proper to place? It would be good to have some resource clearly explaining the file system hierarchy.
ZSH only displaying last 16 or so commands with history. HISTSIZE & SAVEHIST are 500
In ZSH when I type I'm only displayed the last 16 or so commands. I would like to display all the existing commands in the history file. When I look in my .zsh_history (my history file) I see all the 500 previous commands that should be there. I looked in the man page, but I don't see anything that…
How can I convert from hex to base64?
Can anyone recommend a straightforward way/tool to convert hex to base64? I'm using Linux and OS X.
What is the "Google Update" Firefox add-on?
Browsing through Firefox's Add-ons list, I've discovered that there is one named Google Update, which I don't remember installing. How did it get on Firefox's list of installed Add-ons, or plugins, and what is it doing there?