How do I use grep to find a filename?
The grep command searches through the file, looking for matches to the pattern specified. To use it type grep , then the pattern we’re searching for and finally the name of the file (or files) we’re searching in. The output is the three lines in the file that contain the letters ‘not’.
Is grep faster than grep?
The grep utility searches text files for regular expressions, but it can search for ordinary strings since these strings are a special case of regular expressions. However, if your regular expressions are in fact simply text strings, fgrep may be much faster than grep .
How is grep similar to LS filename?
It’s a very quick operation, similar to ls filename (but recursive if filename is a directory). would allow find to generate a list of all names from the current directory and below, which grep would then filter. This would obviously be a much slower operation.
Which is the correct way to execute grep?
You can group all the name primaries in a single find statement then have find execute grep. -type f since you’re looking for files, it’s better to specify the type to get the result faster. Beside the correct answer is indeed using -o and -exec, here’s a general way to capture the output of a previous command and parse it line by line
Is there a quick way to find a file name?
This would look for filename as the name of a regular file anywhere in the current directory or below. This will be as quick (or comparably quick) as find | grep filename, but the grep solution would match filename against the full path of each found name, similarly to what -path ‘*filename*’ would do with find.
Is there a way to check for match in grep?
This also does not check whether the matched pathnames are for regular files or not, like a find would do with its -type f test. Also. if the pattern does not match anything, it will remain unexpanded. In general there are at least three ways to do a find + grep combination: