#2252

Limiting user processes is important for running a stable system. To limit user process resource, you have just to set shell limit by adding:

• a user name
• or group name
• or all users

to /etc/security/limits.conf file and impose then process limitations.

Example of /etc/security/limits.conf file

*               hard    nofile          65535
*               soft    nofile          4096
@student        hard    nproc           16384
@student        soft    nproc           2047

A soft limit is like a warning and hard limit is a real max limit. For example, following will prevent anyone in the student group from having more than 50 processes, and a warning will be given at 30 processes.

@student        hard    nproc           50
@student        soft    nproc           30

Hard limits are maintained by the kernel while the soft limits are enforced by the shell.

limits, linux, nofile, nproc

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