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1500 questions
57
votes
8 answers
How to remove Private Key Password from pkcs12 container?
I extracted certificate using Chrome's SSL/export command.
Then provided it as input to openvpn - in the config for openvpn:
pkcs12 "path/to/pkcs12_container"
When calling openvpn ~/openvp_config it asks for a password for private key (wich I…
Ayrat
- 673
57
votes
7 answers
What is swap memory?
I am using RAM for storing some of my database tables and the others are stored in hard disk.
Today I came to know that my processes are using swap memory.
Now what is swap memory and how can I detect that which process is using swap memory and how…
developer
57
votes
11 answers
Unable to install .net 3.5 on Windows server 2012
I am trying to install .Net 3.5 on Windows Server 2012 and it constantly keeps failing. I am using "Add or Remove Features" and my Internet is already there. I've read that if alternate source couldn't be found, the installer tries to download…
Tim Tom
- 681
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- 7
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57
votes
4 answers
Why is my rsync so slow?
My Laptop and my workstation are both connected to a Gigabit Switch. Both are running Linux. But when I copy files with rsync, it performs badly.
I get about 22 MB/s. Shouldn't I theoretically get about 125 MB/s? What is the limiting factor…
iblue
- 844
57
votes
4 answers
nginx proxy pass redirects ignore port
So I'm setting up a virtual path when pointing at a node.js app in my nginx conf. the relevant section looks like so:
location /app {
rewrite /app/(.*) /$1 break;
proxy_pass http://localhost:3000;
proxy_redirect off;
proxy_set_header Host…
Paul
- 998
57
votes
3 answers
Do I need to refresh or restart anything after I add/update a crontab in Ubuntu Server 8.04?
When you change something in Apache you need to reload or restart apache. Does anything need to be refreshed or restarted in Ubuntu Server 8.04 after I add/update the crontab? Thanks a bunch for your help.
RayJamesFun
- 573
57
votes
2 answers
Ubuntu Server message says packages can be updated, but apt-get does not update any
Possible Duplicate:
updates in amazon-ec2 ubuntu 10.04 server
When I log into an Ubuntu 10.04.2 LTS server, I see the message:
42 packages can be updated.
18 updates are security updates.
But when I try to update this, nothing gets upgraded as…
Mike T
- 751
- 2
- 8
- 10
57
votes
8 answers
how to restart/clear memcache without restarting the whole web server?
/opt/eduserver/eduserver gives me options:
Usage: /opt/eduserver/eduserver
{start|stop|startphp|startwww|startooo|stopphp|stopwww|stopooo|restartphp|restartwww|restartooo|status|restart|reload|force-reload}
where memcache is php module there is…
Radek
- 1,153
57
votes
6 answers
What's the best fire suppression for a server room?
What is the state of the art in fire suppression for server rooms? What are the top priorities in choosing a good system?
Dennis Williamson
- 62,879
57
votes
9 answers
How do I run a local bash script on remote machines via ssh?
I am looking for a way to push configuration from one central machine to several remote machines without the need to install anything on the remote machines.
The aim is to do something like you would find with tools like cfengine, but on a set of…
tremoloqui
- 1,333
- 1
- 10
- 9
57
votes
7 answers
Is it okay to use a SSH key with an empty passphrase?
When I first learned how to make ssh keys, the tutorials I read all stated that a good passphrase should be chosen. But recently, when setting up a daemon process that needs to ssh to another machine, I discovered that the only way (it seems) to…
mozillalives
- 1,033
56
votes
4 answers
DIMMs: Single vs. Double vs. Quad Rank
What difference does the 'Rank' of DIMMs make to server memory? For example, when looking at server configurations I see the following being offered for the same server:
2GB (1x2GB) Single Rank PC3-10600 CL9 ECC DDR3-1333 VLP RDIMM
2GB (1x2GB) Dual…
MikeyB
- 39,673
56
votes
3 answers
How to fix 'logjam' vulnerability in Apache (httpd)
Recently, a new vulnerability in Diffie-Hellman, informally referred to as 'logjam' has been published, for which this page has been put together suggesting how to counter the vulnerability:
We have three recommendations for correctly deploying…
56
votes
6 answers
What is the recommended CIDR when creating VPC on AWS?
I have been creating AWS VPCs and I am wondering if there is a recommended CIDR value when creating VPCs. What are the factors that I must consider when choosing a CIDR and does the CIDR value affect the performance of the network?
Gene Diaz
- 717
56
votes
4 answers
nice sudo or sudo nice?
is there any difference between running an intensive task over sudo with the following commands?:
nice sudo [intensive command here]
sudo nice [intensive command here]
BTW this is for Linux 3.x.
Nicolas Laplante
- 671