GenWikiLinux
From birchyHistory
(→Create shortcuts in Linux (symbolic links)) |
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== GREP == | == GREP == | ||
| − | grep [ | + | grep [OPTIONS] "REGEXP" [FILES(s)] |
| − | + | *"REGEXP" can be any [[Regular Expression]] | |
| − | If file is omitted, all files in current dir are searched. | + | *Single or double quotes can be used. |
| − | Multiple files can be specified separated by spaces or wildcarded (*.txt) | + | *Quotes can be omitted if there are no spaces in the search term. |
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| + | *If file is omitted, all files in current dir are searched. | ||
| + | *Multiple files can be specified separated by spaces or wildcarded (*.txt) | ||
| + | *''While most tutorials assume that you are going to specify a file to search, using the search feature in vi makes more sense for working with a single file.'' | ||
| − | -i ignore case | + | OPTIONS: |
| − | -n print line #s | + | -i ignore case |
| − | -l just show filenames | + | -r recursive files inclusion |
| − | -x exact matches only | + | -F Fast search using literal search term, not regEx |
| − | -w match whole words only | + | -n print line #s |
| − | -m, --max-count=NUM stop after NUM matches | + | -l just show filenames |
| − | -a text files only | + | -x exact matches only |
| − | + | -w match whole words only | |
| + | -m, --max-count=NUM stop after NUM matches | ||
| + | -a text files only | ||
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| + | -iFr ignore case, simple string search, search current directory and subdirectories | ||
| + | '''egrep''' is replaced with '''grep -E''') | ||
| + | '''fgrep''' is replaced with '''grep -F''') | ||
| − | + | Can pipe the output of another command | |
| + | ls |grep blah lists all files in the current directory whose names contain the string "blah" | ||
| + | ==Create shortcuts in Linux (symbolic links)== | ||
| − | + | ln -s /pathToTarget nameOfTheLink | |
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| − | + | e.g. ln -s /var/www/html/public_html/ webDirectory | |
| − | + | ln creates hard and soft links. The -s option create soft (symbolic) links to resources in other directories, even other drives. | |
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