8.10 Shell Special Symbol cut command 8.11 sort_wc_uniq command 8.12 tee_t

8.10 Shell Special Symbol Cut command

• : Represents any arbitrary character
  ？ : Represents any single character
  #: Denotes comment characters
  \ denotes a de-semantic character
  | Represents a pipe character
  The Cut command is used to intercept a field
  -D specify delimiter, delimited by double quotation marks (-D ":" To specify colon delimiter)
  -C: Specify the number of characters
  -F: The number of blocks to be followed
  
  

8.11 Sort_wc_uniq Command
The sort command is primarily used for sorting
-T: followed by delimiters (as with the cut-d delimiter)
-N: Indicates a purely numeric sort
-R: Reverse Sort
-U: means to go heavy
Wc-l: Command represents count Rows
UNIQ-C: Command representation

8.12 tee_tr_split Command

TR command: Replacement character tr [A-z] [a-z] lowercase to uppercase



8.13 Shell Special Symbol
$ variable prefix,! $, regular inside means end of line
Multiple lines of command are written to one line, separated by semicolons.
~ User home directory, followed by regular expression to indicate match
& put the command behind the command and throw it backstage.
[0-9] [A-Z][A-Z][ABCD] One of the specified characters
|| and && used between commands

8.10 Shell Special Symbol cut command 8.11 sort_wc_uniq command 8.12 tee_t