Tuesday, March 12, 2013

Dollars in Shell

As pointed out here (stackoverflow : link):
  • Positional parameters $1 ,2,3… and their corresponding array representation, count and IFS expansion @, #, and *.
  • - current options set for the shell.
  •  pid of the current shell (not subshell)
  • _ most recent parameter (or the abs path of the command to start the current shell immediately after startup)
  • IFS the (input) field separator
  • ? most recent foreground pipeline exit status
  • ! PID of the most recent background command
  • 0 name of the shell or shell script

No comments:

Post a Comment