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open files

BIND: Max open files (1024) is smaller than max sockets (4096) Error and Solution

While going though my logs I found that BIND9 on Debian version 5.x is giving a warning which read as follows:

max open files (1024) is smaller than max sockets (4096)

How do I fix this problem?
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Can’t re-open pipe to command substitution (fd 4): No child processes error and solution

Q. I’m running Debian Linux 64 bit server. I’m getting an error which read as follows:
Can’t re-open pipe to command substitution (fd 4): No child processes

How do I fix the problem?

A. This error occurs when Linux server run out of open files maximum limit i.e system cannot create or open a new file due to number of open files reached the maximum limits of files.

To solve this problem just configure the system to accept the more open files. Please see previous faq:

Linux Increase The Maximum Number Of Open Files / File Descriptors (FD)

How do I increase the maximum number of open files under CentOS Linux? How do I open more file descriptors under Linux?
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