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271 votes
19 answers
333k views

Unix/Linux find and sort by date modified

How can I do a simple find which would order the results by most recently modified? Here is the current find I am using (I am doing a shell escape in PHP, so that is the reasoning for the variables): ...
user avatar
271 votes
9 answers
668k views

Get a list of Open Ports in Linux

I need a Linux command to list all free open ports for use in an application lsof -i TCP| fgrep LISTEN Does not seen to be helping as the Ports it lists are not necessarily free for use. How do I ...
Stanley Mungai's user avatar
271 votes
3 answers
163k 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.
moinudin's user avatar
  • 3,064
271 votes
11 answers
167k views

Can you GPG sign old commits?

Git now has the ability to sign commits with git commit -S, which is great, but sometimes I forget the flag to commit, and sometimes I mail myself patches which I apply with am, and that command doesn'...
Magnus's user avatar
  • 4,376
269 votes
8 answers
880k views

Get Last Modified Date of File in Linux

I'm new to Linux. I'm using the command-line. I'm trying to view the last modified date of a file. How do I do that in Linux from the Command Line?
user70192's user avatar
  • 2,819
266 votes
11 answers
614k views

Is it possible to ping an address:port?

I am not into networking, and I have the following question related to the Linux ping command. Can I only ping an address? For example: miner@raspberrypi ~ $ ping onofri.org PING onofri.org (67.222....
AndreaNobili's user avatar
  • 7,141
266 votes
27 answers
250k views

What can I do to stop the Play / Pause button from opening iTunes?

In Snow Leopard the Play / Pause media button (on the F8 key) opens up iTunes. How can I disable that? Preferably keeping the old Leopard behaviour, so I can use it to control other media applications ...
265 votes
3 answers
488k views

How to connect to a website that has only IPv6 addresses without a domain name?

If a server has only IPv6 addresses without a domain name, how can I connect to the server from my web-browser?
Eonil's user avatar
  • 5,714
264 votes
10 answers
43k views

Why is Google so much faster than a hard-drive search?

When I search a file on my HD in Windows 7 or Windows XP it takes some minutes to finish the process. If I fill in a search term in Google, the answer is on my screen in milliseconds How is it ...
Arne's user avatar
  • 1,787
264 votes
5 answers
89k views

Which Unicode characters do smilies like ٩(•̮̮̃•̃)۶ consist of?

How do I make Unicode texts like the one in the title, or like the following, without resorting to copy+paste? ٩(-̮̮̃-̃)۶ ٩(●̮̮̃•̃)۶ ٩(͡๏̯͡๏)۶ ٩(-̮̮̃•̃). As an aside, note that in your browser the ...
Anirudh Goel's user avatar
  • 2,971
263 votes
13 answers
343k views

Is there a fix for the "Too many open files in system" error on OS X 10.7.1?

I need to get rid of the pesky "Too many open files in system" limit on OS X 10.7.1.  Is there a way?
John Wilund's user avatar
  • 2,647
263 votes
6 answers
127k views

Choosing between .bashrc, .profile, .bash_profile, etc [duplicate]

This is embarrassing, but after many years of using POSIX systems full time, I still have a hard time figuring out if a shell customization should go in .bashrc, .profile, or somewhere else. Not to ...
Avdi's user avatar
  • 2,810
262 votes
12 answers
805k views

How can I execute a Windows command line in background?

How can I execute a windows command line in the background, without it interacting with the active user?
Mohammad AL-Rawabdeh's user avatar
262 votes
12 answers
1.2m views

How do I get different background images on my dual monitors?

Is there a way to set two different background pictures for my two monitors in Windows 7? By default the same background picture is used for both displays. I am looking for a solution without ...
balint's user avatar
  • 2,803
262 votes
1 answer
231k views

How can I clear cookies for a single site? [duplicate]

Sometimes a webapp breaks for whatever reason, and I need to clear my cookies in order to use it again. I wind up clearing all of my cookies, which is a pain, because I then have to log back in to all ...
Louis Waweru's user avatar
  • 24.6k
262 votes
10 answers
316k views

How to use Markdown in Notepad++

I love writing in Markdown and would like to be able to write and preview Markdown content in Notepad++. Are there any WYSIWYG Markdown plugins for Notepad++?
srk's user avatar
  • 2,821
261 votes
7 answers
278k views

What is the difference between a certificate and a key with respect to SSL?

Whenever I try to understand anything about SSL I always have a hard time keeping track of what "key" and "certificate" refer to. I fear many people use them incorrectly or interchangeably. Is there ...
drs's user avatar
  • 2,813
261 votes
4 answers
314k views

How can I install 7zip so I can run it from Terminal on OS X

I would like to be able to run 7zip from the command line on Mac. Does anyone have instructions on how to set this up?
Paul Sheldrake's user avatar
261 votes
7 answers
264k views

When should I use /dev/shm/ and when should I use /tmp/?

When should I use /dev/shm/ and when should I use /tmp/? Can I always rely on them both being there on UNIX?
Deleted's user avatar
  • 5,108
259 votes
4 answers
261k views

How to list Chocolatey packages already installed and newer version available from the command line

I have the following packages installed with Chocolatey. choco list > choco list Chocolatey v0.9.9.2 adobereader 11.0.10 ...
Joel Handwell's user avatar
258 votes
9 answers
543k views

How do I change the language of all Powerpoint slides at once?

I want to change the proofing language of all my slides in a Powerpoint. I've tried setting the language via the Language Preferences menu, however this only changes it for new powerpoints.
liamzebedee's user avatar
  • 3,207
258 votes
10 answers
2.6m 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?
Chris Bye's user avatar
  • 3,165
257 votes
5 answers
375k views

How to find files with certain text in the Terminal

I'd like to find all files that contain a certain string of text. How would you do that in the Terminal?
Svish's user avatar
  • 39.4k
256 votes
12 answers
381k views

How do I start Chrome using a specified "user profile"?

I use the new built-in "Users" feature of Chrome to switch between Home/Work accounts easily. However, Chrome remembers the "last" user profile you had selected when launching new windows. This is a ...
Danny Tuppeny's user avatar
254 votes
8 answers
189k views

Way to avoid ssh connection timeout & freezing of GNOME Terminal

When I connect via ssh to certain servers, it timeouts and "freezes" the terminal (doesn't accept input, doesn't disconnect, can't Ctrl-C to kill the ssh process or anything). This is in Ubuntu's ...
Kzqai's user avatar
  • 2,878
254 votes
13 answers
832k views

How to search inside files on Windows 7?

In Windows XP we can search for files that contain a defined keyword (inside all files types). Windows 7 can look inside files for a keyword, but only for text files. (*.doc, *.txt, *.inf, ...), not (...
user avatar
253 votes
5 answers
780k views

How to reinstall a package using 'apt-get'?

It seems that my aptitude is somehow broken: sudo aptitude update 0% [Working]Segmentation fault dmesg [223282.616599] aptitude[30972]: segfault at 67707f ip 7f954dcfae5d sp 7ffff5a5f950 error 4 in ...
Vokuhila-Oliba's user avatar
253 votes
12 answers
137k views

Is there a way for one SSH config file to include another one?

In case it matters: OS: Ubuntu 10.04 SSH: OpenSSH_5.3p1 Debian-3ubuntu5 I'd like one SSH config file to include another one. The use case would be to define whatever I want in my default .ssh/...
Joe Casadonte's user avatar
253 votes
10 answers
503k views

Mac OS X: Best Way to Make an ISO from a CD or DVD

Both command-line and screen-oriented pointers appreciated! update: I verified the disk utility, hdiutil, and dd methods. dd seems the fastest, 30 minutes on my macbook pro vs. 40 minutes for ...
253 votes
2 answers
226k views

Vertically stack multiple images using ImageMagick

I would like to combine multiple images into one image using ImageMagick. To explain a little better, I want the result to look similar to this: That is, I have a number of screenshots, and I want to ...
Petter's user avatar
  • 2,641
253 votes
4 answers
335k views

Connect to the host machine from a VirtualBox guest OS?

I'd essentially like to access my host computer from the guest in VirtualBox. Is there an IP address given for my host which I can use from the guest? Are there extra steps required to set this up? I'...
Naftuli Kay's user avatar
  • 9,621
253 votes
8 answers
387k views

Read the contents of a zipped file without extraction?

How can I read the contents of a particular file in an archive without extracting the .zip it is contained within? I'm using the Linux command line. An earlier question asks about viewing the ...
Shrikanth's user avatar
  • 2,531
252 votes
4 answers
448k views

How to convert .ppk key to OpenSSH key under Linux?

I know that is possible to convert .ppk under puttygen in Windows, but how to do that on Linux? Is this possible ?
marioosh's user avatar
  • 3,561
252 votes
8 answers
24k views

What do the parentheses and number after a Unix command or C function mean?

I keep seeing parentheses and a number after a command in Unix or Linux or C function. For example: man(8), ftok(2), mount(8), etc. What do these mean? I see them in man too.
Malfist's user avatar
  • 3,049
251 votes
10 answers
900k views

How to fix the wrong number of unread emails flag in Outlook?

I have an annoying problem in Outlook 2013. My inbox is flagged with "1" unread message, but this is not the case. Even when I empty my inbox folder, this bold "1" stays next to my folder, new as it ...
Rabskatran's user avatar
  • 4,769
251 votes
5 answers
446k views

Linux Bash Script, Single Command But Multiple Lines?

I have the following script I wrote by searching Google, and it backs up my Linux system to an archive: #!/bin/bash # init DATE=$(date +20%y%m%d) tar -cvpzf /share/Recovery/Snapshots/$HOSTNAME_$...
Jay LaCroix's user avatar
  • 2,531
249 votes
32 answers
447k views

Windows equivalent of the Linux command 'touch'?

What do you use when you want to update the date-modified field of a file on Windows? commands accessible via C++, .NET, C#, or something native to Windows (Vista preferably) tools/applications ...
249 votes
16 answers
528k views

How do I extract files from an MSI package?

We have some old patches that we want to get the files from but don't wish to spend the time installing them to a machine. Can anyone advise a way to extract files from an MSI installation package?
Martin's user avatar
  • 4,194
249 votes
10 answers
199k views

Is there any program or way to make Mac OS X's ⌘-Tab behave like Windows' Alt-Tab? [closed]

Is there any program or way to make Mac OS X's ⌘Tab(Command-Tab) behave like Windows' AltTab? That is, instead of switching between applications, to switch between windows of all applications? I do ...
Pablo Fernandez's user avatar
248 votes
35 answers
289k views

Is there a way to display a countdown or stopwatch timer in a terminal?

How can I display a real-time countdown timer on the Linux terminal? Is there an existing app or, even better, a one liner to do this?
tir38's user avatar
  • 2,721
248 votes
8 answers
203k views

How to make an SSH tunnel publicly accessible?

Referring back to this question, I am executing the below via OpenSSH (Client: Mac OS X 10.6 | Server: Linux Mint), however the port that is being tunneled is not working publicly: ssh -R 8080:...
Trevor Rudolph's user avatar
247 votes
15 answers
336k views

Looking for HTTP debugging proxy for Mac similar to Fiddler on Windows [closed]

In previous jobs when I've worked on a Windows machine, I've used Fiddler for viewing HTTP transactions and debugging. I'm specifically looking to monitor the HTTP transactions for an ajax site I'm ...
247 votes
4 answers
30k views

My cat sat on my laptop, now the right side of my keyboard types the wrong characters

My cat sat on my laptop and now if I type either L or P, it inputs 3 or * instead. The rest of my keyboard still works correctly. The problem is bad enough that I had to use the touch screen of my ...
user660920's user avatar
  • 1,775
246 votes
8 answers
275k views

How can I avoid SSH's host verification for known hosts?

I get the following prompt everytime I try to connect a server using SSH. I type "yes", but is there a way to aovid this? The authenticity of host '111.222.333.444 (111.222.333.444)' can't be ...
shantanuo's user avatar
  • 2,763
246 votes
12 answers
359k views

What to do when Ctrl + C can't kill a process?

Ctrl + C doesn't always work to kill the current process (for instance, if that process is busy in certain network operations). In that case, you just see "^C" by your cursor and can't do ...
Dustin Boswell's user avatar
246 votes
11 answers
1.0m views

Kill a process which says "Access denied"

I have a process that I can't kill with either Task Manager or Process Explorer - I get the error "Access denied". The process isn't a Windows executable. How can I kill it? Is there some tool I ...
Tony_Henrich's user avatar
  • 11.7k
245 votes
9 answers
856k 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 ...
Carson Myers's user avatar
  • 3,101
245 votes
6 answers
460k views

Cut part from video file from start position to end position with FFmpeg [duplicate]

I have a video file of 30 minutes, but I want to extract a video from 00:09:23 to 00:25:33. I can define the startposition with -ss, but I couldn't find one for the end position. Any help please?
x74x61's user avatar
  • 2,841
245 votes
11 answers
197k views

Windows equivalent of whereis?

Is there an equivalent of the Unix whereis command in Windows? So that I could figure out where commands I can run actually is.
Svish's user avatar
  • 39.4k
244 votes
9 answers
317k views

Unix zip directory but excluded specific subdirectories (and everything within them)

I'm trying to zip a directory (on Unix via SSH) but I need to exclude a couple of subdirectories (and all files and directories within them). So far I have this: zip -r myarchive.zip dir1 -x dir1/...
sulman's user avatar
  • 5,121

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