Posts

Showing posts from October, 2009

Common Unix - Shell Features

Overview of common shell features.  The following features are standard in every shell. List is as follows - Command     Meaning >     Redirect output >>     Append to file <     Redirect input <<     "Here" document (redirect input) | Pipe     output &     Run process in background. ;     Separate commands on same line *     Match any character(s) in filename ?     Match single character in filename [ ]     Match any characters enclosed ( )     Execute in subshell ` `     Substitute output of enclosed command " "     Partial quote (allows variable and command expansion) ' '     Full quote (no expansion) \     Quote following character $var     Use value for variable $$     Process id $0     Command name $n     nth argument (n from 0 to 9) $*     All arguments as a simple word #     Begin comment bg     Background execution break     Break from loop statements cd     Change directories continue     R