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memcached: Failed To Set rlimit For Open Files Error and Solution

I'm using RHEL 6 / CentOS 6.x and install the memcached server. However, whey I try to start the server using service memcached start command, I get the following error:

Starting memcached: failed to set rlimit for open files. Try running as root or requesting smaller maxconns value. [FAILED]

How do I fix this problem?
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HowTO: Linux Disable a User Account Command

How do I disable a user account under Linux operating systems? How can I completely disable a user account Linux server?
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Mediawiki Fix Internal Server Host Names / Redirection In shared Hosting or Proxy Setup

Our customer support wiki runs on an internal host (ip:, hostname a-node100.:300) and it is behind the nginx reverse proxy server. However, our Apache server end up displaying internal server name http://a-node100.:300/, which results into an unexpected redirection and timeouts as http://a-node100.:300/ is not accessible over the Internet. How do I force nginx or apache to use the base URL of our server (http://support.example.com/wiki/)?

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How To Run Linux Web Server / Service on Private IP Network

Q. I've only one public IP address assigned by my ISP using metro Ethernet connection. eth0 has public IP and eth1 is connected to our network switch. How do I configure Linux box to forward traffic to my web server hosted at IP address?
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