CentOS tr & amp; cut command explanation

Tr
-D. Delete matching characters.
-S: delete consecutive identical characters
'[String1] ''[string2]' replace string 1 with string 2

Cut
-B is counted as one byte, letter, and space, and Chinese characters are counted as three Bytes:
For example, 1-3 (the first three bytes) Or, 1-3, 8 (the first three bytes plus the eighth byte ),
-3, 8-(before the third byte, after the eighth byte)
-C: Only one character is used as the character and only one Chinese space is used.
-D-f #/-f #-# use a combination of tabulation operators to intercept rows or multiple rows. This option is not applicable when the number of spaces and tabulation operators between each row is different.