ulimit file descriptors

notes.txt

su USER --shell /bin/bash --command "ulimit -n"

You need to edit /etc/pam.d/common-session* and add the following line to the end:

session required pam_limits.so

# cat /etc/security/limits.d/90-nproc.conf
*          soft    nproc     8192
root       soft    nproc     unlimited
*          soft    nofile    102400
*          hard    nofile    102400


https://gist.github.com/ekillaby/5880958
https://singztechmusings.wordpress.com/2011/07/11/ulimit-how-to-permanently-set-kernel-limits-in-linux/