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1500 questions
70
votes
9 answers
gpg --gen-key hangs at gaining enough entropy on centos 6
Trying to generate a key for a server.
gpg --gen-key
We need to generate a lot of random bytes. It is a good idea to perform
some other action (type on the keyboard, move the mouse, utilize the
disks) during the prime generation; this gives…
stormdrain
- 1,469
- 7
- 28
- 53
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
3 answers
What does [::] mean as an ip address? Bracket colon colon bracket
When I run netstat there are some entries such as TCP [::]:8010 computername LISTENING
What does that mean? It is impossible to search for...
carpat
- 1,065
70
votes
9 answers
Convert from P7B to PEM via OpenSSL
On Ubuntu, I cannot convert certificate using openssl successfully.
vagrant@dev:/vagrant/keys$ openssl pkcs7 -print_certs -in a.p7b -out a.cer
unable to load PKCS7 object :PEM
routines:PEM_read_bio:no start line:pem_lib.c:696:Expecting:…
Kevin Meredith
- 1,309
- 2
- 15
- 21
70
votes
6 answers
How to diagnose a 500 Internal Server Error on IIS 7.5 when nothing is written to the event log?
I've just deployed an update to an existing ASP.NET MVC3 site (it was already configured) and I'm getting the IIS blue screen of death stating
HTTP Error 500.0 - Internal Server Error
The page cannot be displayed because an internal server error…
Greg B
- 1,608
70
votes
9 answers
Unknown/unsupported storage engine: InnoDB | MySQL Ubuntu
I recently upgraded from the previous LTS Ubuntu to Precise and now mysql refuses to start. It complains of the following when I attempt to start it:
╰$ sudo service mysql restart
stop: Unknown instance:
start: Job failed to start
And this shows in…
Garrett
- 833
70
votes
4 answers
What is the "slash" after the IP?
In Amazon EC2, where I set "security groups", It says: Source:
0.0.0.0/0
And then it gives an example of: 192.168.2.0/24
What is "/24"?
I know what port and IP is.
Alex
- 8,591
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
- 6,987
70
votes
4 answers
What is the difference between iisreset, recycle, refresh and restart?
In IIS7, there are numerous things you can do that seem to restart the website. I am unclear about exactly how they are all related.
run iisreset from the command line
refresh a website
recycle an app pool
restart a website
Can someone explain…
jimconstable
- 905
70
votes
3 answers
How do I enable non-free packages on Debian?
How can I enable non-free packages on Debian? I want to install Sun's Java JDK but it's not available to me.
Quiffner
- 703
70
votes
7 answers
DNS A vs NS record
I'm trying to understand DNS a bit better, but I still don't get A and NS records completely.
As far as I understood, the A record tells which IP-address belongs to a (sub) domain, so far it was still clear to me. But as I understood, the NS record…
Tiddo
- 1,029
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
3 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
- 23,975
- 42
- 135
- 187
70
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
- 13,174
- 20
- 75
- 93
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
- 15,155