egrep AND运算符

Question

我知道egrep有一个非常有用的方法,通过使用以下两个表达式:

egrep "pattern1.*pattern2"|egrep "pattern2.*pattern1" filename.txt|wc -l

但是,在搜索三个表达式时,有一种简单的方法可以使用egrep的AND运算符,因为随着添加额外表达式,排列会呈指数增长.

我知道另一种方式,sort|uniq -d 但我正在寻找一个更简单的解决方案.

编辑:

我目前的搜索方式将产生五个总结果:

#!/bin/bash
pid=$$
grep -i "angio" rtrans.txt|sort|uniq|egrep -o "^[0-9]+ [0-9]+ " > /tmp/$pid.1.tmp
grep -i "cardio" rtrans.txt|sort|uniq|egrep -o "^[0-9]+ [0-9]+ " > /tmp/$pid.2.tmp
grep -i "pulmonary" rtrans.txt|sort|uniq|egrep -o "^[0-9]+ [0-9]+ " > /tmp/$pid.3.tmp
cat /tmp/$pid.1.tmp /tmp/$pid.2.tmp|sort|uniq -d > /tmp/$pid.4.tmp
cat /tmp/$pid.4.tmp /tmp/$pid.3.tmp|sort|uniq -d > /tmp/$pid.5.tmp
egrep -o "^[0-9]+ [0-9]+ " /tmp/$pid.5.tmp|getDoc.mps > /tmp/$pid.6.tmp
head -10 /tmp/$pid.6.tmp

mumps@debianMumpsISR:~/Medline2012$ AngioAndCardioAndPulmonary.script 
1514 Structural composition of central pulmonary arteries. Growth potential after surgical shunts.
1517 Patterns of pulmonary arterial anatomy and blood supply in complex congenital heart disease
with pulmonary atresia
3034 Controlled reperfusion following regional ischemia.
3481 Anaesthetic management for oophorectomy in pulmonary lymphangiomyomatosis.
3547 A comparison of methods for limiting myocardial infarct expansion during acute reperfusion--
primary role of unload

而:

mumps@debianMumpsISR:~/Medline2012$ grep "angio" rtrans.txt|grep "cardio" rtrans.txt|grep "pulmonary" rtrans.txt|wc -l
185

产生185行文本,因为它只是在肺部而不是所有三次搜索中获取搜索的值.

Answer 1

怎么样

grep "pattern1" file|grep "pattern2"|grep "pattern3" 

这将给出那些包含p1,p2和p3的行.但任意顺序.