The usage of the Linux basic command look
This article mainly introduces "the usage of Linux basic command look". In daily operation, I believe many people have doubts about the usage of Linux basic command look. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "the usage of Linux basic command look"! Next, please follow the editor to study!
Look
Displays lines in the file that start with a specific string. When look performs a binary search, the lines in the file must be sorted. If no file is specified, the file "/ usr/share/dict/words" is used, comparing only alphanumeric characters and ignoring the case of alphanumeric characters.
The scope of this command: RedHat, RHEL, Ubuntu, CentOS, SUSE, openSUSE, Fedora.
1. Grammar
Look [options] string files
2. List of options
Option
Description
-- version
Display command version information
-- help
Show help documentation
-d
Compare only numbers and letters, and ignore others
-f
Ignore the case of characters
-a
Use the dictionary file / usr/dict/web2
-t
Specify string Terminator
3. Examples
Show lines that begin with hello
[root@localhost weijie] # cat 1.c / / View the file
Hello world
I am david.
I love linux
Love code.
[root@localhost weijie] # look hello 1.c / / displays lines starting with hello
Hello world
At this point, the study of "the usage of the Linux basic command look" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!
