Goal :
to understand the shell wildcard
familiar gadgets and cut the shell using wildcards
What is the cut
cut column is taken tool for intercepting the column.
(1) grammar
# Cut options file name
(2) Common Options
-c divided in units of characters, taken
-d custom delimiter, default tab \ t
used in conjunction with -d -f, specifies which region taken
For example
cut-d: -f1 1.txt to: colon split, truncated column first content
cut -d: -f1,6,7 1.txt to: colon segmentation, 1,6,7 column content of interception
cut -c4 1.txt taken per line in the first 4 characters
cut -c1-4 1.txt taken documents 1-4 characters per line
cut -c4-10 1.txt intercept file 4-10 characters per line
cut -c5-1.txt from all five characters after the character begins intercepting
Combat :
1. Specific Requirements: Interception ":" The first character segmentation
2. Specific requirements: intercepting ":" Split 1 to 7
3. Specific Requirements: intercepting characters 1-5
4. Specific requirements: taken after 10 characters
5. specific needs: intercepting 5-10 characters
6. Specific requirements: cut interception spaces
cut -d' ' -f1
7. Specific requirements: Lists the current system run level
