grep

grep

Synopsis
grep [ -ir ] <expr> print matching lines
Details
The grep command reads from standard input and prints lines that contain the <expr> argument. The supported options are as follows:

-r
Treat the <expr> argument as a Java regular expression. (Without this option, <expr> is treated as a literal string.)
-i
Invert the sense of the command; i.e. print lines that do not match the pattern.
Bugs
The command line syntax is not compatible with Unix / Linux.
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