Linux String Matching

Source: Internet
Author: User
The beginning and end of a string
% X = aabbaarealwwvvww
% Echo "$ {x % W * w }"
% Echo "$ {x % W * w }"
% Echo "$ {X # A * }"
% Echo "$ {X # A * }"

Where, # indicates the header, because # on the keyboard is on the left of $.
Here, % indicates the tail, because % on the keyboard is on the right of $.
A single operator represents the minimum matching, and a double operator represents the maximum matching.
That is to say, when there are multiple matching schemes, select the maximum length or the minimum length of the matching.

Change the extension of all files in a directory to. C:
For I in *; do sudo MV $ I $ {I}. C; done

How to remove. C from the. c file;
For I in *; do sudo MV $ I $ {I %. c}; done

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.