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  2. grep - Wikipedia

    en.wikipedia.org/wiki/Grep

    The pcregrep command is an implementation of grep that uses Perl regular expression syntax. [17] Similar functionality can be invoked in the GNU version of grep with the -P flag. [18] Ports of grep (within Cygwin and GnuWin32, for example) also run under Microsoft Windows. Some versions of Windows feature the similar qgrep or findstr command. [19]

  3. Regular expression - Wikipedia

    en.wikipedia.org/wiki/Regular_expression

    This originates in ed, where / is the editor command for searching, and an expression /re/ can be used to specify a range of lines (matching the pattern), which can be combined with other commands on either side, most famously g/re/p as in grep ("global regex print"), which is included in most Unix-based operating systems, such as Linux ...

  4. pgrep - Wikipedia

    en.wikipedia.org/wiki/Pgrep

    List of Unix commands; pidof — find the process ID of running programs; pkill — signal processes based on name and other attributes; ps — display the currently running processes; grep — search for lines of text that match one or many regular expressions

  5. Comparison of regular expression engines - Wikipedia

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

    NOTE: An application using a library for regular expression support does not necessarily support the full set of features of the library, e.g., GNU grep uses PCRE, but supports no lookahead, though PCRE does.

  6. find (Windows) - Wikipedia

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

    Findstr, Windows and ReactOS command-line tool to search for patterns of text in files. find (Unix), a Unix command that finds files by attribute, very different from Windows find; grep, a Unix command that finds text matching a pattern, similar to Windows find; forfiles, a Windows command that finds files by attribute, similar to Unix find

  7. agrep - Wikipedia

    en.wikipedia.org/wiki/Agrep

    agrep (approximate grep) is an open-source approximate string matching program, developed by Udi Manber and Sun Wu between 1988 and 1991, [1] for use with the Unix operating system. It was later ported to OS/2, DOS, and Windows.

  8. Perl Compatible Regular Expressions - Wikipedia

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

    Perl Compatible Regular Expressions (PCRE) is a library written in C, which implements a regular expression engine, inspired by the capabilities of the Perl programming language.

  9. sed - Wikipedia

    en.wikipedia.org/wiki/Sed

    Conversely, for simpler operations, specialized Unix utilities such as grep (print lines matching a pattern), head (print the first part of a file), tail (print the last part of a file), and tr (translate or delete characters) are often preferable. For the specific tasks they are designed to carry out, such specialized utilities are usually ...