Understanding user limits

On Linux systems, there are limitations that every process is held to. These limits are in place to prevent processes from utilizing too many system resources.

While these limits are enforced on every user, it is possible, however, to set different limits per user. To check what limits are set on the vagrant user by default, we can use the ulimit command:

$ ulimit -a
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 3825
max locked memory       (kbytes, -l) 64
max memory size         (kbytes, -m) unlimited
open files                      (-n) 1024
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 3825
virtual memory...