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1500 questions
64
votes
4 answers

How to change sshd port on Mac OS X?

I want to change which port sshd uses on a Mac server. For example, let's say from port 22 to port 32. Editing /etc/sshd_config does not seem to work. Does anyone know how to change it? I'd prefer a method that's compatible with all OSX versions…
Alexander Artemenko
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64
votes
4 answers

Is there a maximum size for content of an HTTP POST?

Is there a maximum size for an HTTP POST? And if there is a max size, is it determined by the protocol or is it at the discretion of the server?
user11480
63
votes
4 answers

Purpose of Debian "sites-available" and "sites-enabled" directories?

Can anyone tell me—in a nutshell—what the purpose of these two directories are in Debian? /etc/apache2/sites-enabled /etc/apache2/sites-available I notice that diffing sites-available/000-default and sites-enabled/default shows they are…
aaaidan
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63
votes
1 answer

Server Aliases on NGINX

I'm moving a site to a new server running on NGINX. The old site's Apache2 VirtualHost has ServerAlias configured that I want to replicate in the NGINX configuration. From what I've read on the NGINX Docs this seems to be simply achieved with…
Holly
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63
votes
9 answers

Is it OK to set up passwordless `sudo` on a cloud server?

I love the idea of accessing servers via keys, so that I don't have to type in my password every time I ssh into a box, I even lock my user's (not root) password (passwd -l username) so it's impossible to log in without a key. But all of this…
Dmitry Pashkevich
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63
votes
8 answers

Deploying a folder of template files using ansible

Is there an easy way to deploy a folder full of template .j2 folder to a linux box, using the same name as the template, but without the .j2 extension, rather than using the template module for each file? Right now i have a long list of: - name:…
Trololololol
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63
votes
12 answers

Loopback to forwarded Public IP address from local network - Hairpin NAT

This is a Canonical Question about Hairpin NAT (Loopback NAT). The generic form of this question is: We have a network with clients, a server, and a NAT Router. There is port forwarding on the router to the server so some of it's services are…
adopilot
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63
votes
10 answers

Can I run a cron job more frequently than every minute?

Is it possible to run a cron job every 30 seconds without a sleep command?
user15336
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63
votes
5 answers

How to delete domain user profile from a computer?

I'm wondering how to safely remove a domain user profile from a computer that is a part of a domain. I don't want to delete the account from the domain itself, I just need to remove the profile from this computer, to do some cleanup. I'm currently…
Zlatko
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63
votes
8 answers

How to change owner of mount point

We have moved mysql data directory to another disk, so now /var/lib/mysql is just a mount point to another partition. We set the owner of the /var/lib/mysql directory to mysql.mysql. But everytime we mount the partition, the ownership changes to…
Arie K
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63
votes
7 answers

Best Practices in Username Standards: Avoiding Problems

I'm interested in finding out what people's experiences with standard usernames is. I've always been in places that used {firstInitial}{lastname} (sometimes with a length-limit). Now I've users that want {firstname}.{lastname} - and now it comes up…
Mei
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63
votes
10 answers

How to extinguish a small fire in a server rack to minimize damage to surrounding equipment?

Suppose I have a rack with several servers and other stuff. One of servers overheats severely and either starts smoking or catches fire while there's a serviceman nearby. If anything similar happens in an apartment and there's a fire extinguisher…
sharptooth
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63
votes
3 answers

How to install libpq-dev on Centos 5.5

In order to develop one web application based on postgresql, i need to install libpq on my centos. I can install it by "apt-get install libpq-dev" on ubuntu, but i can not install it on centos by "yum install libpq". Who can tell me how to install…
larry
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63
votes
2 answers

Multiple "ServerName" per VHost?

In Apache2 is it possible to set multiple ServerNames in one VHost? I want to setup a "wiki" vhost for an internal wiki. My network has a ".lan" suffix. How do I get Apache to answer both "wiki" and "wiki.lan" on the same vhost?
Soviero
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63
votes
14 answers

Why would you use IPv6 internally?

Of course, I realize the need to go to IPv6 out on the open Internet since we are running out of addresses, but I really don't understand why there is any need to use it on an internal network. I have done zero with IPv6, so I also wonder: Won't…
KCotreau
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