modify the maximum number of files on the server
add vi / etc/ scurity/ limits.conf
* soft nofile 65536
* hard nofile 65536
/ etc/sysctl.conf file has been added
fs.file-max=65535
enter a command
sysctl -p
exit restart xftp link and enter ulimit-a
open files is still 1024. Ask how to modify it.
the system is ubuntu 16