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]] | |
− | + | *Single or double quotes can be used. | |
− | + | *Quotes can be omitted if there are no spaces in the search term. | |
− | + | ||
+ | *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.'' | ||
− | + | OPTIONS: | |
+ | -i ignore case | ||
+ | -r recursive files inclusion | ||
+ | -F Fast search using literal search term, not regEx | ||
+ | -n print line #s | ||
+ | -l just show filenames | ||
+ | -x exact matches only | ||
+ | -w match whole words only | ||
+ | -m, --max-count=NUM stop after NUM matches | ||
+ | -a text files only | ||
+ | |||
+ | -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 | |
− | + | ||
− | + | 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. |