Commands

Logging

  1. journalctl -f
    • [f]ollow new messages (like `tail -f` for traditional syslog):
  2. journalctl -u kibana -f
  3. journalctl –since now|today|yesterday|tomorrow –until YYYY-MM-DD HH:MM:SS
    • Filter messages within a time range (either timestamp or placeholders like “yesterday”):
  4. journalctl _PID=pid
    • Show all messages by a specific process:

Process

Files

Users

Kernel

  1. lsmod Shows the status of linux kernel modules.
  2. modprobe Add or remove modules from the Linux kernel.