Shulou(Shulou.com)06/02 Report--

This article mainly introduces "the usage of linux sh script commands". In daily operation, I believe many people have doubts about the usage of linux sh script commands. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the doubts about "the usage of linux sh script commands"! Next, please follow the editor to study!

Determine whether or not root

# Check if user is rootif [$(id-u)! = "0"] Then echo "Error: You must be root to run this script Please use root to install lnmp "exit 1fi#### id-u get user uid#-g user group id-G user group id#-n used with ugG-un user name-gn user group name-Gn all user group names #

Determine whether the file / folder exists

# if the file exists-e, leave a space. If requires fi ending if [- e / bin/cat]; then echo 123; fi# folder-dif [- d / usr/include/x86_64-linux-gnu/curl] Then ln-sf / usr/include/x86_64-linux-gnu/curl / usr/include/fi#-w writable-f file-L link-r readable-x executable # file1-nt file2 file1 is newer than file2 # file1-ot file2 file1 is older than file2 # at this point, the study on "the usage of linux sh script commands" is over, hoping to solve everyone's 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!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.