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1500 questions
71
votes
17 answers

Does orientation affect hard drive lifespan?

Are there any studies or evidence which show that mounting a hard drive horizontally is better than vertically for the lifespan of the device? Or upside down, or any direction for that matter.
Bob
  • 2,957
71
votes
4 answers

Better logging for cronjobs? Send cron output to syslog?

I am looking for a better way to log cronjobs. Most cronjobs tend to spam email or the console, get ignored, or create yet another logfile. In this case, I have a Nagios NSCA script which sends data to a central Nagios sever. This send_nsca script…
Stefan Lasiewski
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  • 42
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  • 188
71
votes
19 answers

Is Round-Robin DNS "good enough" for load balancing static content?

We have a set of shared, static content that we serve up between our websites at http://sstatic.net. Unfortunately, this content is not currently load balanced at all -- it's served from a single server. If that server has problems, all the sites…
Jeff Atwood
  • 13,264
70
votes
15 answers

Are IP addresses "trivial to forge"?

I was reading through some of the notes on Google's new public DNS service: Performance Benefits Security Benefits I noticed under the security section this paragraph: Until a standard system-wide solution to DNS vulnerabilities is universally…
Jeff Atwood
  • 13,264
70
votes
12 answers

The following signatures couldn't be verified because the public key is not available: NO_PUBKEY

My environment: # uname -a Linux app11 4.9.0-5-amd64 #1 SMP Debian 4.9.65-3+deb9u2 (2018-01-04) x86_64 GNU/Linux # # cat /etc/*release PRETTY_NAME="Debian GNU/Linux 9 (stretch)" NAME="Debian GNU/Linux" VERSION_ID="9" VERSION="9…
alexus
  • 13,667
70
votes
5 answers

Why can't I cd to a directory with docker run?

I need to run an application from a specific directory. $ sudo docker run -P ubuntu/decomposer 'cd /local/deploy/decomposer; ./decomposer-4-15-2014' 2014/10/09 21:30:03 exec: "cd /local/deploy/decomposer; ./decomposer-4-15-2014": stat cd…
schmmd
  • 803
70
votes
3 answers

Is the PHP option 'cgi.fix_pathinfo' really dangerous with Nginx + PHP-FPM?

There has been a lot of talking about a security issue relative to the cgi.fix_pathinfo PHP option used with Nginx (usually PHP-FPM, fast CGI). As a result, the default nginx configuration file used to say: # NOTE: You should have…
Totor
  • 3,048
70
votes
16 answers

Is FreeNAS reliable?

FreeNAS seems like a great product with a full checklist of features, even iSCSI. But how reliable is it? There are a few scary stories about lost data, for example here. Here is another example. If you have used freeNAS for a longer period of time…
Console
  • 447
70
votes
7 answers

Extracting files from Clonezilla images

Is there a way to browse Clonezilla images and extract individual files from them without restoring the whole image?
Ferruccio
  • 2,863
70
votes
11 answers

Disable a service from starting at all runlevels?

I have a service foo which currently starts at runlevel 3 and above. How can I stop it from doing so, without using update-rc.d foo stop 3 ., which (if I understand it correctly) would turn off the service at each runlevel change. (ie., if I was at…
lfaraone
  • 1,641
70
votes
3 answers

php cli memory limit

I am getting a memory error in a php cron job: Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 71 bytes) in /opt/matrix/core/lib/DAL/DAL.inc on line 830 The applicable parts of the crontab are: $ sudo crontab -u…
Ryan H
  • 1,518
70
votes
6 answers

How can I query my system via command line to see if a KB patch is installed?

I'm looking to find out if a KB is installed via command line.
MathewC
  • 7,147
70
votes
9 answers

How can I get a list of shared directories on local Windows server?

If I have a Windows server (typically 2000, 2003 or 2008), is there a simple way to list all local directories shared on that server? I can find the shares themselves easily enough, but I would love a quick way to find the local directories they…
Rune Jacobsen
  • 805
70
votes
9 answers

How can I check from the command line if a reboot is required on RHEL or CentOS?

I'm using CentOS and Red Hat Enterprise Linux on a few machines without the GUI. How can I check if recently installed updates require a reboot? In Ubuntu, I'm used to checking if /var/run/reboot-required is present.
Jim Hunziker
  • 1,872
69
votes
2 answers

Apache ProxyPass with SSL

I want to proxy requests from an SSL site via a non-SSL site. My Apache httpd.conf looks like this: ServerName foo.com ProxyPass / https://bar.com/ So, when I visit http://foo.com, I expect apache to…
tylerl
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