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System-wide File Descriptor Limit

• Get current value: sysctl fs.file-max

• modify max fd limit: sysctl -w fs.file-max=10000

User File Descriptor Limit

• Get current value: ulimit -n

• modify max fd limit: ulimit -n 10000

• use ulimit -a to print all limits of a user, such as fd, processes, etc.

Based on http://www.cyberciti.biz/faq/linux-increase-the-maximum-number-of-open-files/

Ref:

http://unix.stackexchange.com/questions/29577/ulimit-difference-between-hard-and-soft-limits http://ss64.com/bash/ulimit.html

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