Using the pattern match !("file1") does not work within a bash script but will work on the command line. For example: ls !("file1"|"file2") This will list all files in directory except file1 a...

Problem The behaviour of !(pattern-list) does not work the way I would expect when used in parameter expansion, specifically ${parameter/pattern/string} Input a="1 2 3 4 5 6 7 8 9 10" ...