Linux Process Monitoring/Diagnosis

PSTREE

• pstree -p
  • Show procress tree with process number

PS

• ps ww 1234
  • Show complete command

journalctl

https://wiki.ubuntuusers.de/systemd/journalctl/

Usage

• journalctl -k
  
  • log of the last boot equivalent to dmesg
• journalctl -k --since "2 hours ago"
  
  • all dmesg output in the last 2 hours
• journalctl --list-boots
• journalctl -p err -b
  
  • show errors

Persist log

https://askubuntu.com/questions/859816/where-did-the-functionality-of-var-log-dmesg-go-in-xenial-16-04

• vi /etc/systemd/journald.conf
  
  • #Storage=auto
    Storage=persistent
• systemctl restart systemd-journald

atop 

nice top with more features

dstat

Memory info

• dstat -sv