Contents
What happens if there is no wildcard in shell script?
If your shell has a nullglob option and it’s turned on, a wildcard pattern that matches no files will be removed from the command line altogether. This will make ls see no pathname arguments, list the contents of the current directory and succeed, which is wrong.
How are wildcards used to match filenames in Linux?
There are three main wildcards in Linux: 1 An asterisk (*) – matches one or more occurrences of any character, including no character. 2 Question mark (?) – represents or matches a single occurrence of any character. 3 Bracketed characters ( [ ]) – matches any occurrence of character enclosed in the square brackets.
How to pass a wildcard parameter to a bash file?
If you’re truly sure you want to get the script to expand the *, you have to make sure that * is passed to the script (enclosed in quotes, as in the other answers), and then make sure it is expanded at the right point in the processing (which is not trivial). At that point, I’d use an array.
Is there a way to match all filenames?
This command that follows will match all filenames beginning with users-i, followed by a number, a lower or upper case letter or number, then a lower or upper case letter and ends with one or more occurrences of any character. 10. You can as well negate a set of characters using the ! symbol.
How to pass wild cards to a script?
I don’t often use $@ without the double quotes, but this is one time when it is more or less the correct thing to do. The tricky part is that it won’t handle wild cards with spaces in very well. That works fine. But try passing that as a wild-card to the script and well, let’s just say it gets to be tricky at that point.
How to search for filenames in Bash wildcard?
The following command will search any files with extension ‘.bash’ or ‘.PNG’ You can use asterisk (*) for matching any filename partially. The following command will remove the file which contains ‘img’ word in any part of the filename. Use of question mark (?)