[Linux max open files] #linux

max_open_files.sh

ulimit -a
ulimit -n

# check hard limit
ulimit -Hn

# check soft limit
ulimit -Sn

# current session change
sysctl -w fs.file-max=500000
# check the value
cat /proc/sys/fs/file-max

# permanently change
vim /etc/sysctl.conf
> fs.file-max=500000

# check the value
cat /proc/sys/fs/file-max

# apply the changes
sysctl -p

vim /etc/security/limits.conf
<domain>  <type>  <item>  <value>
* soft nproc 65535
* hard nproc 65535
* soft nofile 65535
* hard nofile 65535

# relogin or reboot check the value again.

# ref: https://www.tecmint.com/increase-set-open-file-limits-in-linux/