Usefull Oneliners

vim

• Set tab to 4 spaces:

  set tabstop=8 softtabstop=0 expandtab shiftwidth=4 smarttab
  

Shell

• Find my public IP:

  dig +short myip.opendns.com @resolver1.opendns.com
  

• Check if private and public ssh keys match:

  diff <(cat ~/.ssh/id_rsa.pub | cut -d' ' -f 2) <(ssh-keygen -y -f ~/.ssh/id_rsa | cut -d' ' -f 2)'
  

References

• https://stackoverflow.com/questions/1878974/redefine-tab-as-4-spaces
• https://serverfault.com/questions/426394/how-to-check-if-a-rsa-public-private-key-pair-matched