Shell Script if judgment file

Source: Internet
Author: User
-S file file is somefile 0 o'clock
[f]: Determines whether it is a file [-

X "/bin/ls"]: Determines whether/BIN/LS exists and has executable permissions

[-n "$var]": Judge $va      R variable has a value

["$a" = "$b"]: To determine if $a and $b are equal-          

r file users can read as true-

W file users can write as true

-X file Users can execute true-

f file file for the normal file is true-D file for the directory is true-c file for the character special files for the true-B file file for the

block special file for the true-

s file is not the same as the true. C12/>-t file is true when the device specified by the filename descriptor (default 1) is a terminal
Related Article

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: info-contact@alibabacloud.com 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.