UNIX for Dummies Questions & Answers

how can I search for two or more patterns in one line using grep?
for example if I want to show only the lines that have patterns "abc" and "123"?
and what if I want to show only the lines that have either "abc" or "123" in them?
any hint apprecited

egrep "pattern1|pattern2" filename

tnx but that doesnt work in grep.
but worked well with egrep.

hi, how does regular expression for "or" and "and" work in sed?
like if I want sed to find and do something only with the lines that contain "abc" or "123" pattern. or lines that have "abc" and "123" both.
I normally use this regular expression for that: ."*{abc,123}.*" but itdoesnt work in sed.
can anyone fix this line for me?
sed '.*{abc,123}.*/s# etc...' filename

showing lines that contain abc and 123 both (using Perl):

Code:

perl -nl -e 'print if (m/abc/  and  m/123/);' file