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→Complex / Extended Regular Expressions
:'''Repetition: ''' <span style="color:blue;font-family:courier;font-weight:bold;">{min,max}</span><br>Allows for more precise repetitions. Using braces, you can specify<br>the '''minimum''' and/or '''maximum''' number of repetitions.
:'''Grouping: ''' <span style="color:blue;font-family:courier;font-weight:bold;">( )</span><br>Perhaps you want to search for repetition for a group of characters, a word, or a phase.<br>You can enclose them within brackets ( ) to specify a group.
:'''or Condition: ''' <span style="color:blue;font-family:courier;font-weight:bold;">|</span><br>Can be used with grouping to match a variety of character(s), words or phases.<br>The | symbol is used to separate the variety of character(s) within a group.<br><br>
Examples of how to use these complex regular expressions with the '''egrep''' command are displayed below:<br><br>