awk:awk_patterns
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| awk:awk_patterns [2020/07/15 09:30] – external edit 127.0.0.1 | awk:awk_patterns [2022/06/13 09:51] (current) – [Match using Multiple Patterns] peter | ||
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| Line 5: | Line 5: | ||
| < | < | ||
| 10 | 10 | ||
| - | 11 | + | 11 |
| 12 | 12 | ||
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| ===== Matching Patterns ===== | ===== Matching Patterns ===== | ||
| - | To only print out lines which **match** a specific search criteria, issue the following command: | + | To only print out lines which **match** a specific search criteria: |
| <code awk> | <code awk> | ||
| Line 22: | Line 22: | ||
| </ | </ | ||
| - | which will display something like: | + | returns: |
| < | < | ||
| Line 29: | Line 29: | ||
| </ | </ | ||
| - | This only prints out the lines from the file which contained the number 45. | + | <WRAP info> |
| + | **NOTE: | ||
| + | </ | ||
| ---- | ---- | ||
| Line 35: | Line 38: | ||
| ===== Multi-line Output with Patterns ===== | ===== Multi-line Output with Patterns ===== | ||
| - | To output onto multiple lines, issue the following command: | + | To output onto multiple lines: |
| <code awk> | <code awk> | ||
| Line 41: | Line 44: | ||
| </ | </ | ||
| - | which will display something like: | + | returns: |
| < | < | ||
| Peter Terence Roux | Peter Terence Roux | ||
| 10 45 | 10 45 | ||
| - | Virginia | + | Virginia |
| 11 45 | 11 45 | ||
| </ | </ | ||
| - | Again, this only prints out the lines from the file which contained the number 45. | + | <WRAP info> |
| + | **NOTE: | ||
| - | But also prints out a 2nd line because of the use of the semicolon. | + | * But also prints out a 2nd line because of the use of the semicolon. |
| + | |||
| + | </ | ||
| <WRAP info> | <WRAP info> | ||
| Line 63: | Line 69: | ||
| </ | </ | ||
| - | which will display something like: | + | returns: |
| < | < | ||
| Peter Terence Roux | Peter Terence Roux | ||
| 10 45 | 10 45 | ||
| - | Virginia | + | Virginia |
| 11 45 | 11 45 | ||
| 12 5 | 12 5 | ||
| Line 93: | Line 99: | ||
| </ | </ | ||
| - | which will display something like: | + | returns: |
| < | < | ||
| Line 102: | Line 108: | ||
| </ | </ | ||
| - | The pipe symbol **|** is used to provide multiple patterns. | + | <WRAP info> |
| + | **NOTE: | ||
| + | </ | ||
| ---- | ---- | ||
| Line 108: | Line 117: | ||
| ===== Match against specific field ===== | ===== Match against specific field ===== | ||
| - | To restrict the match to only a specific field, issue the following command: | + | To restrict the match to only a specific field: |
| <code awk> | <code awk> | ||
| Line 114: | Line 123: | ||
| </ | </ | ||
| - | which will display something like: | + | returns: |
| < | < | ||
| Line 122: | Line 131: | ||
| </ | </ | ||
| - | Note that this time Adam Ridley is not displayed even though the source file has a 48 as part of his record. | + | <WRAP info> |
| + | **NOTE: | ||
| - | The tilda ~ ties the match to a specific field. | + | * The tilda ~ ties the match to a specific field. |
| + | |||
| + | </ | ||
| ---- | ---- | ||
| Line 130: | Line 142: | ||
| ===== Match not against a specific field ===== | ===== Match not against a specific field ===== | ||
| - | To have the match be the opposite of matching a specific field, issue the following command: | + | To have the match be the opposite of matching a specific field: |
| <code awk> | <code awk> | ||
| Line 136: | Line 148: | ||
| </ | </ | ||
| - | which will display something like: | + | returns: |
| < | < | ||
| Line 144: | Line 156: | ||
| </ | </ | ||
| - | The **exclamation mark** and **tilda** (!~) together informs to not match to a specific field. | + | <WRAP info> |
| + | **NOTE: | ||
| + | </ | ||
| ---- | ---- | ||
| Line 150: | Line 165: | ||
| ===== Match in a Range ===== | ===== Match in a Range ===== | ||
| - | To have the match be the opposite of matching a specific field, issue the following command: | + | To have the match be the opposite of matching a specific field: |
| <code awk> | <code awk> | ||
| - | awk '/ | + | awk '/ |
| </ | </ | ||
| - | which will display something like: | + | returns: |
| < | < | ||
| Line 165: | Line 180: | ||
| </ | </ | ||
| - | This finds all fields with values between 42 and 48. | + | <WRAP info> |
| + | **NOTE: | ||
| + | </ | ||
| ---- | ---- | ||
awk/awk_patterns.1594805433.txt.gz · Last modified: 2020/07/15 09:30 by 127.0.0.1