Regular Expressions in grep
{"Image DocumentName": "Regular Expressions in grep", "Image ImageDescription": "Regular expressions are metacharacter patterns used in ways different. from how the shell uses them. Regular Expression Meaning.   0 or more of the previous character. . a single character. [pqr] a single p or q or r. [c1-c2] a single char in the ASCII range of c1 thru c2. [^pqr] a single character not p nor q nor r. ^abc abc at the beginning of line. abc  abc at the end of the line.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}