When you try to analyze the problem or performance of your Linux OS, steps:
overview tools
top
vmstat
sar
hardware overview
after you find the problem on which part, use more specific tool
cpu
vmstae
mpstat
disk/IO
lsof
iostate
memory
network
ss
netstat
process
ps
ls -al /proce | grep pid
stat /proc/pid
OS version
uname
lscpu
lsblk
Last updated 6 years ago