ulimit:tldr:a3ab0

The command "ulimit -H -n" in a Linux terminal is used to display or set the maximum number of file descriptors that can be opened by a process. Here is the breakdown of each component:

• "ulimit" is a command-line utility in Linux used to set or display resource limits for the user's login session or restrict particular processes.
• "-H" is an option that tells the "ulimit" command to display or set the hard limit of a resource. Hard limits are the absolute maximum values set by the system administrator.
• "-n" is an option specific to the file descriptor limit. It represents the maximum number of file descriptors that a process can have open simultaneously.

So, when you execute "ulimit -H -n" in the terminal, it will display the hard limit for the number of file descriptors that can be opened.