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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.
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 .
/I Specifies that the search is not to be case-sensitive. /X Prints lines that match exactly. /V Prints only lines that do not contain a match. /N Prints the line number before each line that matches. /M Prints only the filename if a file contains a match. /O Prints character offset before each matching line. /P Skip files with non-printable ...
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 ...
Like -i, but ignore only tabs and spaces. No Yes No No No No No -z,--zero-terminated: End lines with 0 byte, not newline No No No Yes Yes No No --help: Display help and exit No No No Yes Yes No No --version: Output version information and exit No No No Yes Yes No No /R: Reverses the result of comparisons. No No No No No Yes No /S
The commands can be used to ignore the success or failure of a sequence of other commands, as in the example: make … && false Setting a user's login shell to false , in /etc/passwd , effectively denies them access to an interactive shell, but their account may still be valid for other services, such as FTP .
xargs (short for "extended arguments") [1] is a command on Unix and most Unix-like operating systems used to build and execute commands from standard input.It converts input from standard input into arguments to a command.
In Unix-like operating systems, find is a command-line utility that locates files based on some user-specified criteria and either prints the pathname of each matched object or, if another action is requested, performs that action on each matched object.