Questions tagged [configuration]

Configuration is a general term that can refer to the arrangement of functional units according to their nature and characteristics. Also, it can refer to software configuration which more suitable for server-related topics.

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288
votes
8answers
598k views

How to bind MySQL server to more than one IP address?

Is there a secret way to bind MySQL to more than one IP address? As far as I can see the bind-address parameter in the my.cnf does not support more than one IP and you can't have it more than once.
216
votes
13answers
79k views

Any benefit or detriment from removing a pagefile on an 8 GB RAM machine?

I'm running Windows 7 on a dual core, x64 AMD with 8 GB RAM. Do I even need a page file? Will removing it help or hurt performance? Would it make a difference if this is a server or a desktop? ...
200
votes
5answers
337k views

command for checking Apache configuration

I'm looking for a command that checks the validity of the config files in Apache server on both Debian and RHEL distros. I need to do this prior to restart, so there will be no downtime.
140
votes
4answers
104k views

Difference in sites-available vs sites-enabled vs conf.d directories (Nginx)?

I have some experience using linux but none using nginx. I have been tasked with researching load-balancing options for an application server. I have used apt-get to install nginx and all seems ...
98
votes
6answers
252k views

Adding a directory to $PATH in CentOS?

We just got our new server(s) up and we're running CentOS on them all. After successfully installing Ruby Enterprise Edition, I would now like to add the REE /bin (located at /usr/lib/ruby-enterprise/...
78
votes
4answers
189k views

How to disable timeout for nginx?

On a local development machine, I have a nginx reverse proxy like so: server { listen 80; server_name myvirtualhost1.local; location / { proxy_pass http://127.0.0.1:8080; } server { ...
67
votes
7answers
21k views

How to check for modified config files on a Debian system?

How to find all Debian managed configuration files which have been changed from the default?
59
votes
8answers
7k views

Why would I need a firewall if my server is well configured?

I admin a handful of cloud-based (VPS) servers for the company I work for. The servers are minimal ubuntu installs that run bits of LAMP stacks / inbound data collection (rsync). The data is large ...
57
votes
3answers
59k views

Do Apache config files support block commenting?

You can use # to comment out individual lines. Is there a syntax for commenting out entire blocks? I've tired surrounding the block (specifically a <Directory> block) with <IfModule asdfasdf&...
51
votes
9answers
76k views

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 ...
51
votes
2answers
8k views

Why do I have to edit /etc/sudoers with visudo?

I've noticed that the sudoers file and cron config files act in a special way compared to other config files on Linux. They need to be edited with a special wrapper rather than any text editor. Why is ...
49
votes
1answer
190k views

nginx server directive is not allowed here

I know there are dupes of this out there, but I can't seem to solve this in my situation. I'm following an article on setting up nginx as reverse proxy with apache. And I get this error: nginx: [...
48
votes
7answers
58k views

How can I prevent a DDOS attack on Amazon EC2?

One of the servers I use is hosted on the Amazon EC2 cloud. Every few months we appear to have a DDOS attack on this sever. This slows the server down incredibly. After around 30 minutes, and ...
39
votes
4answers
34k views

Directly editing IIS 7 applicationHost.config configuration file

I know that IIS 7+ now uses XML config files instead of the metabase. I also know that if I edit a web.config file for a given site, IIS automagically detects the changes and implements any ...
38
votes
1answer
71k views

Declaring multiple ports for the same VirtualHosts

Declare multiple ports for the same VirtualHosts: SSLStrictSNIVHostCheck off # Apache setup which will listen for and accept SSL connections on port 443. Listen 443 # Listen for virtual host requests ...
37
votes
7answers
58k views

Linux: how to restore config file using apt-get/aptitude?

I've occasionally lost my config file "/etc/mysql/my.cnf", and want to restore it. The file belongs to package mysql-common which is needed for some vital functionality so I can't just purge &&...
34
votes
1answer
32k views

Understanding the nginx proxy_cache_path directive

Suppose I have this nginx config file proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=myCache:8m max_size=100m inactive=1h; What does the keys_zone=myCache:8m mean? There's not much said to ...
33
votes
1answer
33k views

Redis Cluster: (error) MOVED

I have a Redis cluster with the following nodes: 192.168.0.14:6379 master (slots from 0 to 16383) 192.168.0.15:6379 slave (slots from 0 to 16383) 192.168.0.16:6379 master (without slots) ...
32
votes
6answers
8k views

Automatically Configure New Computers

My company is in the process of upgrading all of our users from old Windows XP computers to newer quad-core Win7 computers. This is a good thing - it's long overdue that we upgrade our workstations - ...
31
votes
3answers
28k views

Passing default answers to apt-get package install questions?

I'm trying to write a configuration script for new servers, and one of the first steps is to install a series of required packages, such as MySQL, phpMyAdmin, etc. using apt-get install However, when ...
31
votes
2answers
23k views

Comments in OpenVPN client config files?

Is it possible to put comments in the client config files (those in the path specified by "client-config-dir") for OpenVPN, i.e. something beginning with "#" or "//" or the like? If so, what is the ...
29
votes
2answers
41k views

Merging variable with string in config file

I the have following setup in my conf file upload_set_form_field $upload_field_name.name "$upload_file_name"; But I want change chosen param name to: upload_set_form_field ($upload_field_name+"[...
27
votes
5answers
32k views

Nginx set_real_ip_from AWS ELB load balancer address

I have a set of Nginx servers behind an Amazon ELB load balancer. I am using set_real_ip (from the HttpRealIpModule) so that I can access the originating client IP address on these servers (for ...
27
votes
2answers
40k views

nginx split large configuration file

My nginx default configuration file is becoming huge. I'd like to split it to smaller config files, each including only one, maximum 4 locations to each file, so that I can enable/disable them quickly....
27
votes
3answers
163k views

How to stop Remote Desktop from closing my session due to inactivity?

I'm connecting from a windows vista desktop to a server running windows server 2003. I'm using Remote Desktop and I'm running some very long running processes on the remote server. My problem is that ...
25
votes
5answers
50k views

verify sshd configuration

How I can verify the configuration of sshd? For example, I want to make sure that these settings are set and applied: AllowUsers user1 user2 PasswordAuthentication no PermitRootLogin no Is the ...
25
votes
3answers
8k views

How to write a DRY, modular nginx conf (reverse proxy) with named locations

I'm using nginx mostly as a reverse cachining proxy in front of several gunicon/mod_wsgi applications and of course to server static files. I find that quickly my nginx confs become impossible to ...
24
votes
8answers
42k views

How to check if Apache compression is working?

I just added the following to my Apache config file: AddOutputFilterByType DEFLATE text/html text/plain text/xml How do I check if it is actually working? Nothing on the browser tells me if the page ...
24
votes
1answer
16k views

How to show the host/configured/default ssh “configuration”?

According to my ssh_config file... Configuration data is parsed as follows: command line options user-specific file system-wide file With that said, (and yes, I know, I could scour man ssh_config ...
24
votes
6answers
6k views

What are the advantages of putting secret values of a website as environment variables?

The devops guidelines at https://12factor.net/config suggest to put website secrets (database passwords, api keys, etc.) into environment variables. What advantages does that have instead of using ...
24
votes
5answers
25k views

How do I set the date format to ISO globally in Linux?

I would like to globally set the Linux date format to ISO, which looks roughly like this: YYYY-MM-DD HH:MM:SS 2009-03-16 15:20:00 With varying levels of detail, such as omitting time, seconds, etc. ...
23
votes
6answers
25k views

How to use a custom .bashrc file on SSH login

I've found that with the new company I'm working with I often have to access linux servers with relatively short lifetimes. On each of these servers I have an account, but whenever a new one is ...
21
votes
2answers
57k views

How should I use the <If> directive in .htaccess?

I'm trying to add a conditional statement using Apache's If directive in my .htaccess file. I have referenced this page http://httpd.apache.org/docs/trunk/mod/core.html#if but it doesn't elaborate ...
21
votes
2answers
26k views

What is the difference between using upstream and location for php-fpm?

I've been searching around but couldn't find a straight answer, if someone could please clarify this, would be greatly appreciated, thanks! location ~ \.php$ { try_files $uri = 404; ...
21
votes
1answer
15k views

Changing SSH Port: Should I modify only sshd_config, or also ssh_config?

I would like to change my SSH port running Linux CentOS 6. From what I've read on forums, people recommend changing my /etc/ssh/sshd_config file to use a different port number, then restarting the ...
21
votes
1answer
22k views

How to rotate log based on an interval unless log exceeds a certain size?

From the man page of logrotate: minsize size Log files are rotated when they grow bigger than size bytes, but not before the additionally specified time interval (daily, weekly, monthly, or ...
21
votes
3answers
15k views

What is needed to use anycast IPs?

So, there're a bunch of questions on SF about the uses and how anycast IPs are cool. My approach is something more practical. What specifically I need to have to use one of those addresses? Do I need ...
21
votes
1answer
10k views

Override default nginx http configuration without changing default nginx.conf

My intention: I would like to override default configuration defined in /etc/nginx/nginx.conf (in debian 8). The idea is to keep this file completely untouched to ease future system updates and be ...
20
votes
10answers
42k views

Reloading PostgreSQL after configuration changes

I've made some changes to pg_hba.conf and I want them to take affect. I've found several places where people say that I can tell PostgreSQL to reload, but there are several different techniques listed,...
20
votes
8answers
93k views

How do I disable SSLv3 support in Apache Tomcat?

I am trying to reconfigure my Apache Tomcat server to only use TLSv1. However, it is still falling back to SSLv3 using certain browsers. I setup the <connector> tag with the following settings: ...
19
votes
6answers
94k views

Location of postgresql.conf and pg_hba.conf on an Ubuntu server

Where are the files postgresql.conf and pg_hba.conf on a Linux server running PostgreSQL 8.4 installed from Ubuntu repos?
19
votes
3answers
112k views

Configure domain name in CentOS

How do I configure domain names in Cent OS? I am actually connecting to the servers via SSH remote terminal and I also have root credentials. Does configuring the /etc/sysconfig/network and /etc/...
18
votes
2answers
34k views

How to migrate LDAP (database,schema,configuration) to other machine

I'm using openldap 2.4.40, and i need to migrate my existing ldap database, configuration, and schema (basically everything ldap server related) to a new machine. the problem is, I use cn=config ...
18
votes
2answers
64k views

nginx rewrite for an url with parameters

I have an URL of this type: http://www.example.com/?param1=val1&param2=&param3=val3&param4=val4&param5=val5 And I want to redirect it to this one: http://www.example.com/newparam/...
17
votes
3answers
8k views

How to fetch ./configure parameters used at last time?

I am upgrading LAMP stack on customer's server and need to ./configure mysql and apache with exact last settings they were compiled with last time. Where do I get these? PHP configure string can be ...
17
votes
3answers
14k views

Is there a Linux kernel boot parameter to configure an IPv6 address?

I know there is a parameter named ip which lets you configure IPv4 addresses on the Linux kernel through the boot loader. That looks like the following: ip=192.0.2.1::192.0.2.62:255.255.255.192::eth0:...
17
votes
1answer
7k views

overriding nginx access_log directive - duplicate log entries

I'm using the default nginx package on Ubuntu 14.04 server. It is using /etc/nginx/nginx.conf as the main config, and then includes configs from /etc/nginx/conf.d/*.conf and /etc/nginx/sites-enabled/*....
16
votes
4answers
30k views

How do you conditionally include files in Nginx vhost?

In the lines below, I might have a site-specific configuration file that contains additional fastcgi_params unique to that site. If this file exists I want to load it. server { listen 80 ...
16
votes
6answers
43k views

How to parse and convert ini file into bash array variables?

I'm trying to convert an ini file into bash array variables. The sample ini is as below: [foobar] session=foo path=/some/path [barfoo] session=bar path=/some/path so these become: session[foobar]=...
16
votes
2answers
14k views

What is the difference between “route” and “ip route”?

I tried to understand the networking tools on Linux. I am confused now about what I should use to manipulate the static routing: route or ip route?: route - show / manipulate the IP routing table ip ...

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