Shell Special Symbols

~ Home Catalogue ls ~

"Inside the inverted quote is the command echo ' ls ' | ' Echo ls ' | echo ' echo ls ' | ' echo ' echo ls ' replace command $ ()

! Take sung with the historical Command (!123) 123 is the history display

#代表注视信息

$ take Variable Value

% job number Kill%123

& Background Run

* Wildcard Characters

() means to execute in a sub-process.

| Pipeline

\ transfer Character

{} enumeration Touch file{1,2,3}

[] Test

: it means nothing.

; Separating multiple commands

"" (\ ' $!: Execute) ' (\ ' $!: Display character) explains the space of Echo a B C | echo a b C | echo "You cost $5.00" | Echo ' You cost $5.00 '

< files < < Keywords < < < strings

> >>.   ..   ? /root

2> Error Output &> all error outputs

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Shell Special Symbols