Difference between revisions of "Grep"
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| − | '''grep''' ('''G'''lobal '''R'''egular '''E'''xpression '''P'''rint) is a [[:Category:Linux Command Line Tools|command line utility]] that for a given a list of files or standard input to read, grep searches for lines of text that match one or many regular expressions, and outputs only the matching lines. | + | '''grep''' ('''G'''lobal '''R'''egular '''E'''xpression '''P'''rint; g/re/p; global / regular expression / print) is a [[:Category:Linux Command Line Tools|command line utility]] that for a given a list of files or standard input to read, grep searches for lines of text that match one or many regular expressions, and outputs only the matching lines. |
==See also== | ==See also== | ||
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*[http://www.jedsoft.org/jed/ rgrep] — ''recursive grep'' | *[http://www.jedsoft.org/jed/ rgrep] — ''recursive grep'' | ||
*[[wikipedia:pgrep|pgrep]] — displays the processes whose names match a regular expression | *[[wikipedia:pgrep|pgrep]] — displays the processes whose names match a regular expression | ||
| − | *[http://robur.slu.se/jensl/ugrep/ ugrep] & | + | *[http://robur.slu.se/jensl/ugrep/ ugrep] — only do basic regexp string matching |
*[http://search.cpan.org/src/CWEST/ppt-0.14/html/commands/grep/tcgrep.html tcgrep] — rewrite of grep which uses [[Perl]] [[regular expression]] syntax | *[http://search.cpan.org/src/CWEST/ppt-0.14/html/commands/grep/tcgrep.html tcgrep] — rewrite of grep which uses [[Perl]] [[regular expression]] syntax | ||
*[http://apachegrep.sourceforge.net/ apachegrep] — a Perl program to help webmasters go through their [[apache]] logs | *[http://apachegrep.sourceforge.net/ apachegrep] — a Perl program to help webmasters go through their [[apache]] logs | ||
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*[http://www.linuxfocus.org/~guido/ webgrep] — a set of 7 search utilities for web-masters | *[http://www.linuxfocus.org/~guido/ webgrep] — a set of 7 search utilities for web-masters | ||
===Other=== | ===Other=== | ||
| − | *[http://www.cs.helsinki.fi/u/jjaakkol/sgrep.html Structure grep] | + | *[http://www.cs.helsinki.fi/u/jjaakkol/sgrep.html Structure grep (sgrep)] |
| − | *[http://www.dcc.uchile.cl/%7Egnavarro/software/ Nondeterministic reverse grep] | + | *[http://www.dcc.uchile.cl/%7Egnavarro/software/ Nondeterministic reverse grep (NR-grep)] |
*[http://www.grouse.com.au/ggrep/ Grouse Grep (ggrep)] | *[http://www.grouse.com.au/ggrep/ Grouse Grep (ggrep)] | ||
*[http://www.vdesmedt.com/%7Evds2212/grep.html Python Grep (pygrep)] | *[http://www.vdesmedt.com/%7Evds2212/grep.html Python Grep (pygrep)] | ||
| − | *[http://www.ff.iij4u.or.jp/%7Enrt/lv/ Multilingual Grep] | + | *[http://www.ff.iij4u.or.jp/%7Enrt/lv/ Multilingual Grep (lv)] |
==External links== | ==External links== | ||
| − | *[http://www.gnu.org/software/grep/ GNU grep] | + | *[http://www.gnu.org/software/grep/ GNU grep] — the grep that usually comes with Linux distributions |
*[http://unixhelp.ed.ac.uk/CGI/man-cgi?grep GNU grep] man page | *[http://unixhelp.ed.ac.uk/CGI/man-cgi?grep GNU grep] man page | ||
*[http://www.linfo.org/grep.html The grep Command] - by The Linux Information Project (LINFO) | *[http://www.linfo.org/grep.html The grep Command] - by The Linux Information Project (LINFO) | ||
Latest revision as of 08:45, 17 October 2017
grep (Global Regular Expression Print; g/re/p; global / regular expression / print) is a command line utility that for a given a list of files or standard input to read, grep searches for lines of text that match one or many regular expressions, and outputs only the matching lines.
See also
- agrep — approximate grep to facilitate fuzzy string searching
- fgrep — fixed pattern searches
- egrep — for searches involving more sophisticated regular expression syntax
- ngrep — network grep
- rgrep — recursive grep
- pgrep — displays the processes whose names match a regular expression
- ugrep — only do basic regexp string matching
- tcgrep — rewrite of grep which uses Perl regular expression syntax
- apachegrep — a Perl program to help webmasters go through their apache logs
- rexgrep — GUI frontend to grep
- webgrep — a set of 7 search utilities for web-masters
Other
- Structure grep (sgrep)
- Nondeterministic reverse grep (NR-grep)
- Grouse Grep (ggrep)
- Python Grep (pygrep)
- Multilingual Grep (lv)
External links
- GNU grep — the grep that usually comes with Linux distributions
- GNU grep man page
- The grep Command - by The Linux Information Project (LINFO)
- "The Treacherous Optimization" — article on tradeoffs in grep to favor best-case over worst-case scenarios
- Egrep for linguists — an introduction to egrep.
- Tony Abou-Assaleh's list of Greps
- TCGrep
