Global Expressions
by Sanju[ Edit ] 2009-11-03 13:21:20
GLOBAL EXPRESSIONS
Global expressions are mostly used in combination with the command "ls" ( list files ).
I suppose you know that the "*" sign is a wild-card and can stand for one or more characters. The "?" is a wild-card for only 1 character. The "!" excludes the characters that follow.
Examples
$ ls [a-e]*
This will only list the files that start with a, b, c, d or e. ( Not A or B ! )
$ ls [a-eA-E]*
Will do the same but then also A, B ,C ,D and E
$ ls *[a-e]us
The files that end with: aus, bus, cus, dus and eus
$ ls ?[a-e]re
Will show the files; dare, acre, mere, bare, . . . etc.
$ ls *[!a-b]re
Shows files that end with "re", but not the ones on "are" or "bre"
$ ls *.{jpg,png,gif}
List all the files that end with .jpg, .png and .gif
Notice the difference in { } and [ ] !!!
