KylinCommander

课程由阿里云大学免费提供0. 运行chmod +x <name>.sh./<name>.sh1. 变量赋值：直接赋值：A=aaaecho $AB="$A B"B='$A B'注意：1) 等号两边不能有空格; 2)单引号之间的内容原封不动地制定给了变量，双引号之间仅仅是取消了空格的作用，保留特殊符号的含义。命令的结果作为变量 :# 1.A=`date`echo $A# 2.B=$(ls -l)echo $B与其他变量或字符串组成新字

Configure your own Vimcd ~vim .vimrcKey mapnoremap a b​ nore means no recursion. remap a to b:map Q :q<CR>​ Map Q to :q and Enter.Other useful settingsset number : Show the number of line.set relativenumber: Show the relativenumber of line

This is the note that i took for the Class of the MIT : The Missing Semester of Your CS Education(2020).https://www.bilibili.com/video/BV1x7411H7wa/?p=11.ShellWhitespace seperates the arguments, if I need an argument as multiple words:1.Quote those w