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1500 questions
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2 answers

Are EC2 security group changes effective immediately for running instances?

I have an EC2 instance running, and it belongs to a security group. If I add a new allowed connection to that security group through AWS Management Console, should that change be effective immediately? Or perhaps only after restart of the…
Jonik
  • 3,021
56
votes
7 answers

Force SSH to use a specific shell

Is there any way to force SSH to use a particular shell on the remote end, regardless of what the user's default shell is? I've tried solutions akin to: ssh host.domain.com /bin/bash -c 'complicated, multi-line command' but unfortunately the…
plinehan
  • 705
56
votes
10 answers

How to Chown a directory recursively including hidden files or directories

Seems like chown with the recursive flag will not work on hidden directories or files. Is there any simple workaround for that?
toby
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56
votes
4 answers

how to run cron job every 3 months?

What would be the crontab entry look like for a job that runs on the first day of every third month?
haim evgi
  • 753
56
votes
6 answers

How to configure basic authentication in Apache httpd virtual hosts?

I'm trying to configure mercurial access using Apache http. It requires authentication. My /etc/apache2/sites-enabled/mercurial looks like this: NameVirtualHost *:8080 UseCanonicalName Off ServerAdmin …
Jader Dias
  • 4,745
56
votes
4 answers

How do you get e2fsck to show progress information?

I'm running e2fsk on a very large (1TB+) ext3 disk with e2fsck -v /dev/sda1 from RIPLinux booted with PXE. I get e2fsck 1.41.6 (30-May-2009) /dev/sda1 contains a file system with errors, check forced. Pass 1: Checking inodes, blocks, and sizes and…
Tim Abell
  • 1,391
56
votes
2 answers

CNAME record/alias in windows hosts file?

Is it possible to enter some sort of CNAME record or alias in the windows hosts file (C:\Windows\System32\drivers\etc\hosts)? Basically I want to forward all requests made to host A to host B, without having to hard code the IP address (which…
MEMark
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56
votes
4 answers

What does 'nice' mean on CPU utilization graphs?

On Ubuntu server load graphs I see 4 types of CPU consumption: User, System, Nice and Idle. What does Nice type mean?
Niro
  • 1,451
55
votes
11 answers

IIS7: can't set host name on site with SSL cert and port 443

Consider a Win 2008 SP2 machine with IIS7. The task is to apply a certificate and host name to the one and only Site on this machine. The site's host headers need to be abc.123.example.com The first step was installing the .pfx to the Personal…
p.campbell
  • 4,437
55
votes
6 answers

Puppet vs Chef, pro and contra from users and use cases

I already googled and read the "to-puppet-or-to-chef-that-is-the-question" article. I'm interested in use cases, real world implementations in which people had choosen one or the other on real problems bases. I'm particularly interested in…
drAlberT
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55
votes
3 answers

What is the difference between SQL Server standard and web edition?

Is there any technical difference between these 2 editions or is it just how they are licenced?
Shiraz Bhaiji
  • 2,249
55
votes
5 answers

How do I show the actions that installing a .deb package will take?

I would like to be able to view the scripts/triggers associated with a package due for upgrade so that I can tell, for example, whether it will result in the web server being restarted. I can't find an aptitude option to show me that (or apt/dpkg);…
Sam Brightman
  • 865
55
votes
8 answers

Chrome S3 Cloudfront: No 'Access-Control-Allow-Origin' header on initial XHR request

I have a webpage (https://smartystreets.com/contact) that uses jQuery to load some SVG files from S3 through the CloudFront CDN. In Chrome I will open an Incognito window as well as the console. Then I will load the page. As the page loads, I will…
SunSparc
  • 1,038
55
votes
4 answers

Does Wi-Fi traffic from one client to another travel via the access point?

Consider a Wi-Fi network with one access point and two clients, operating in marginal conditions due to range, etc. Client 1 is communicating with Client 2. Obviously the Access Point (AP) must be in range of both (assuming no fancy mesh modes,…
Pete
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55
votes
6 answers

"No command specified" from re-imported docker image/container

I am trying to take a docker container from one machine and run it on another and encountering this error: "Error response from daemon: No command specified". Below is a simplified example showing the problem: docker --version Docker version 1.10.1,…
Greendrake
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