Shell Special Symbols

*-----Wildcard (multi-bit)

?-----wildcard character (one bit)

#-----Comment (Explanatory Note)

\-----caret (\ #1. txt, let #1.txt become a file name, so that the special symbol behind the loss of meaning)

|-----Give the result of one command to another command

$-----As a prefix for variables

!! ----represents the previous command

!$----Last parameter of the previous command

!950----Run No. 950 command

;-----The middle of two commands

~----User Home Directory

&-----Background Run

2>----Error Redirection

2>>----Error Append redirect

>-----Redirection

>>-----Additional redirects

[]-----indicates the range

&&-----The left command executes successfully before executing the command on the right

| | -----Left command does not execute successfully, the right command is executed

;:-----The command on the left executes successfully or not, subsequent commands will execute

Shell Special Symbols