Defining a Shell Script File
- The file permissions are set to include Execute (x)
- The first line of the script includes the path of the script interpreter (the Bourne shell)
- The script contains valid commands
Wild cards (Filename Shorthand or meta Characters)
Note: [..-..] A pair of characters separated by a minus sign denotes a range. Example: $ ls /bin/[a-c]* Will show all files name beginning with letter a,b or c like
/bin/arch /bin/awk /bin/bsh /bin/chmod /bin/cp /bin/ash /bin/basename /bin/cat /bin/chown /bin/cpio /bin/ash.static /bin/bash /bin/chgrp /bin/consolechars /bin/csh
But
$ ls /bin/[!a-o] $ ls /bin/[^a-o]
If the first character following the [ is a ! or a ^ ,then any character not enclosed is matched i.e. do not show us file name that beginning with a,b,c,e...o, like
