• ShellAccounts
• SystemLimits

System Limits

System limits are best configured in /etc/security/limits.conf.

In the case of codd, we have added two groups, med-mem and high-mem. limits.conf looks like this:

@med-mem                -               memlock                         404800
@med-mem                -               rss                             404800
@med-mem                -               as                              404800

# One day 'unlimited' might work as a value, see Debian bug #122400
@high-mem               -               memlock                         1024000
@high-mem               -               rss                             1024000
@high-mem               -               as                              1024000

# Don't limit root, ever.
root                    -

# Default hard limits.
*                       -               nproc                           150

*                       -               memlock                         51200
*                       -               rss                             51200
*                       -               as                              51200

So, everyone is limited to 150 processes.

• high-mem users get about 1GB of memory.
• med-mem users get around 400MB of memory.
• Everyone else gets about 50MB of memory.