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  2. grep - Wikipedia

    en.wikipedia.org/wiki/Grep

    grep is a command-line utility for searching plaintext datasets for lines that match a regular expression. Its name comes from the ed command g/re/p (global regular expression search and print), which has the same effect.

  3. Regular expression - Wikipedia

    en.wikipedia.org/wiki/Regular_expression

    Blue highlights show the match results of the regular expression pattern: /r[aeiou]+/ g (lower case r followed by one or more lower-case vowels). A regular expression (shortened as regex or regexp ), [ 1 ] sometimes referred to as rational expression , [ 2 ] [ 3 ] is a sequence of characters that specifies a match pattern in text .

  4. ngrep - Wikipedia

    en.wikipedia.org/wiki/Ngrep

    ngrep (network grep) is a network packet analyzer written by Jordan Ritter.It has a command-line interface, and relies upon the pcap library and the GNU regex library.. ngrep supports Berkeley Packet Filter logic to select network sources or destinations or protocols, and also allows matching patterns or regular expressions in the data payload of packets using GNU grep syntax, showing packet ...

  5. Help:Searching - Wikipedia

    en.wikipedia.org/wiki/Help:Searching

    Article title grep: searches page titles using regular expressions. This search is much slower than standard search. In particular this tool can search for exact strings of characters, including punctuation and with case sensitivity. For example the pattern \(& Co\. Ltd\. will find only titles containing (& Co. Ltd. exactly as shown. Regular ...

  6. Comparison of regular expression engines - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_regular...

    The matching algorithms of the library are based on the PCRE library, but not all of the PCRE library is interfaced and some parts of the library go beyond what PCRE offers. Currently PCRE version 8.40 (release date 2017-01-11) is used. Erlang: erlang.org: Apache 2.0: Standard library includes PCRE-based re module. The matching algorithms of ...

  7. Perl Compatible Regular Expressions - Wikipedia

    en.wikipedia.org/wiki/Perl_Compatible_Regular...

    Such matching is slower than the normal (ASCII-only) non-UCP alternative. Note that the UCP option requires the library to have been built to include Unicode support (this is the default for PCRE2). Note that the UCP option requires the library to have been built to include Unicode support (this is the default for PCRE2).

  8. Toybox - Wikipedia

    en.wikipedia.org/wiki/Toybox

    grepShow lines matching regular expressions. groups — Print the groups a user is in. gunzip — Decompress gz files. halt — Restart, halt or powerdown the system. head — Copy first lines from files to stdout. help — Show usage information for toybox commands. hexedit — Hexadecimal file editor. hostname — Get/set the current ...

  9. find (Unix) - Wikipedia

    en.wikipedia.org/wiki/Find_(Unix)

    grep is a command-line utility for searching plain-text data sets for lines matching a regular expression and by default reporting matching lines on standard output. tree is a command-line utility that recursively lists files found in a directory tree, indenting the filenames according to their position in the file hierarchy.