Linux - NewbieThis Linux forum is for members that are new to Linux.
Just starting out and have a question?
If it is not in the man pages or the how-to's this is the place!
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
By default grep command gives the filename and the line contains the search word. What command should i use to display only the filenames?
I have another question. What command should i use to display a count of all of filenames in my current working directory that start with the string "Foo" and end with an odd digit?
'ls -1' (that's the number one) gives you a listing of all the files in a single column, good for counting. A regular 'ls' will output the listing with spaces between the filenames, but the listing goes across so it's (slightly) harder to count the number of files.
the 'wc -l' command counts lines fed to it, as opposed to just counting words. You could use the regular 'ls' command and pipe the output to 'wc' with no -l option, but it would miscount files that had spaces in their names. If none of your files had spaces then you could use the command like this:
ls | grep '^Foo.*[13579]' | wc
However, the output of 'wc' without the -l option includes the number of lines, bytes, and words, so you'd have to know what to look at to pull out the value you need. The original method is more direct and could be fed to something else that just needed the line count.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.