# basic system information
lsb_release -a
uname -a
uptime
whoami
who
w
 
# hardware information
lshw # doesn't work
lscpu
lsblk
lspci
lsusb # doesn't work on vultr server
 
# memory usage
free -h
vmstat
vmstat -SM 45 10
top
htop
 
# disk usage
df -h
du -h
 
# internet
ip a
netstat
sudo iftop -i eth0 # doesn't work on vultr

Further reading

EOF