ulimit -a

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Ubuntu 20.04 LTS ulimit default values:

ulimit -a
time(seconds)        unlimited
file(blocks)         unlimited
data(kbytes)         unlimited
stack(kbytes)        8192
coredump(blocks)     0
memory(kbytes)       unlimited
locked memory(kbytes) 65536
process              15638
nofiles              1024
vmemory(kbytes)      unlimited
locks                unlimited
rtprio               0

Alpine nats
ulimit -a
core file size (blocks)         (-c) 0
data seg size (kb)              (-d) unlimited
scheduling priority             (-e) 0
file size (blocks)              (-f) unlimited
pending signals                 (-i) 30943
max locked memory (kb)          (-l) 64
max memory size (kb)            (-m) unlimited
open files                      (-n) 1048576
POSIX message queues (bytes)    (-q) 819200
real-time priority              (-r) 0
stack size (kb)                 (-s) 8192
cpu time (seconds)              (-t) unlimited
max user processes              (-u) unlimited
virtual memory (kb)             (-v) unlimited
file locks                      (-x) unlimited

See also[edit]