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Useful linux commands

  • chmod is the command and system call which may change the access permissions to file system objects (files and directories). It may also alter special mode flags. The request is filtered by the umask. The name is an abbreviation of change mode.
  • ls is used to list files
  • ps a is used to list the processes running
  • shutdown now is used to shutdown the system
  • sudo service lightdm  restart used to log out from the current user
  • sudo add-apt-repository ppa:<ppa_name>
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