Show open UDP sockets linux
All UDP listening sockets with process info
ss -ulnp
more linux
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Bind process to CPU cores
taskset -cp 0,1 <pid>
Show hardware interrupts
watch -n1 'cat /proc/interrupts | head -30'
Show process limits
cat /proc/<pid>/limits
Increase system file descriptor limit
ulimit -n 1048576 && echo '* soft nofile 1048576
* hard nofile 1048576' >> /etc/security/limits.conf
Show inode usage
df -i