UNIX Basic commands: grep
The grep command allows you to search one file or multiple files for lines that contain a pattern. Exit status is 0 if matches were found, 1 if no matches were found, and 2 if errors occurred.
Syntax
The syntax for the grep command is:
grep [options] pattern [files]
Options
| Option | Description |
|---|---|
| -b | Display the block number at the beginning of each line. |
| -c | Display the number of matched lines. |
| -h | Display the matched lines, but do not display the filenames. |
| -i | Ignore case sensitivity. |
| -l | Display the filenames, but do not display the matched lines. |
| -n | Display the matched lines and their line numbers. |
| -s | Silent mode. |
| -v | Display all lines that do NOT match. |
| -w | Match whole word. |
Example
grep -c tech file1
* Please note that there are many flavors of UNIX, so if in doubt, consult your man pages.
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