Linux:grep multiple keywords "and" and "or"

1, or operation

' 123|ABC ' filename  //  Find file (filename) contains 123 or line '123|abc' containing ABC FileName    //  Egrep can also be used to implement '/123|abc/' filename   // how awk is implemented 2, and the Operation

2, with the operation

// displays rows that match both PATTERN1 and pattern2. 

3. Other operations

Grep-i pattern Files   // Search by case-insensitive. Default case sensitive,grep-l pattern files   // list only matching file names,grep-l pattern files   //  Lists the mismatched file names,grep-w the pattern files  // matches only the entire word, not part of the string (such as matching ' magic ' instead of ' magical '), // The matching context displays the [number] row, respectively,

Linux:grep multiple keywords "and" and "or"