[Linux] special symbols

special symbols

• . : current directory
  • cp f1 ./f2 -- copy f1 to f2 in the current directory
• .. : parent directory
  • cp f1 ../f2 -- copy f1 to f2 in the parent directory
• > : standard output redirection
  • cat f1 > f3 -- display the content of f1 in f3 (same effect as “cp f1 f3”)
• | : pipe. redirect the standard output of the first program into the standard input of the second program
  • cat f1 | more
• * : match any file name
  • ls b* -- diplay all file/directory names that start with ‘b’