Shell Special Symbol command

A wildcard character? Unit # blocked command \ Screen symbol
| Pipe character $ use variable ~ Home directory & put behind

>> 2> 2>>
Error redirection
[] Array

Cut segment
Cut-d:-f 3, 4 characters
Files under three and four columns
-C Line
-F column (start with-D definition)
Sort sorts
SORT-T:
-K By column
-N by number
-R Reverse Order
-U to repeat
-O Write file with name
-F ignores case
How many lines are in the Wc-l document
-W How many words
-m number of characters (line break at the end)
Uniq to repeat (limit clear adjacent duplicates clear before sorting resolved)
-C calculates the number of repetitions
-s Specifies to skip the first n characters
-W Specifies the maximum character to use for comparison
-D Find Duplicate rows
Tee redirects and displays
W.H.O. | Tee 11
TR Replacement
TR ""
-D Delete after match
-C Fetch complement set
-S compression matches the character to a
Split cutting Large files
-B by Size
-L by row
&& and the left command succeeds before executing
|| Or the left command is unsuccessful before it is executed.
To be executed without success.

Shell Special Symbol command